HP dc7700 - Convertible Minitower PC Use and care manual

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PRODUCT HOME
HP Compaq dc7700 Business PC - Removal and Replacement Procedures
-- Small Form Factor (SFF) Chassis
Security Clip
Installing a Cable Lock
Installing a Padlock
Cable Connections
DDR2-SDRAM DIMMs
Populating DIMM Sockets
Replacing Memory
Drive Positions
Optical Drive
External 3.5-inch Drive
Primary Hard Drive
Type 1 Battery Holder
Type 2 Battery Holder
Type 3 Battery Holder
Adherence to the procedures and precautions described in this chapter is essential for proper service. After completing all necessary removal and
replacement procedures, run the Diagnostics utility to verify that all components operate properly.
NOTE: Not all features listed in this guide are available on all computers.
1. Remove/disengage any security devices that prohibit opening the computer (Unlocking the Smart Cover Lock and External Security Devices).
2. Close any open software applications.
3. Exit the operating system.
4. Remove any diskette, compact disc. or media card from the computer.
5. Turn off the computer and any peripheral devices that are connected to it.
  CAUTION: Turn off the computer before disconnecting any cables. Regardless of the power-on state, voltage is always present
on the system board as long as the system is plugged into an active AC outlet. In some systems the cooling fan is on even when the
computer is in the “Standby,” or “Suspend” modes. The power cord should always be disconnected before servicing a unit.
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Preparation for Disassembly
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6. Disconnect the power cord from the electrical outlet and then from the computer.
7. Disconnect all peripheral device cables from the computer.
NOTE: During disassembly, label each cable as you remove it, noting its position and routing. Keep all screws with the units
removed.
  CAUTION: The screws used in the computer are of different thread sizes and lengths; using the wrong screw in an application
may damage the unit.
If you have locked the Smart Cover Lock use Computer Setup to unlock the lock. Refer to the Desktop Management Guide on the Documentation and
Diagnostics CD for more information about the Smart Cover Lock.
If you cannot access Computer Setup to unlock the cover you will need to remove the locking solenoid by using the Smart Cover FailSafe
Key (Spare part number 166527-001 or 166527-002). Once the solenoid has been deactivated or removed the access panel can be
removed.
The Smart Cover FailSafe Key will be needed in any of the following circumstances:
Power outage
Startup failure
Processor or power supply failure
Lost password
To open the computer cover with the Smart Cover Lock engaged:
1. Prepare the computer for disassembly (Preparation for Disassembly).
2. Using the Smart Cover FailSafe Key, remove the tamper-proof screw (1) that secures the Smart Cover Lock to the inside of the chassis.
3. Push the metal arm that wraps around the air vent grid up and back (2) to free the Smart Cover Lock from the chassis.
4. Remove the computer cover (Computer Cover).
To reattach the Smart Cover Lock:
1. Install the Smart Cover Lock assembly on the inside of the rear panel with the metal arm (1) wrapped around the air vent grid on the back of the chassis.
2. Use the supplied tamper-resistant screw (2) to secure the Smart Cover Lock to the chassis.
Unlocking the Smart Cover Lock
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1. Prepare the computer for disassembly (Preparation for Disassembly).
2. Remove the computer cover (Computer Cover).
3. Remove the special security clip (Security Clip) from the top corner of the power supply cage.
4. Raise the power supply to its full upright position.
5. Disconnect the hood sensor cable from the system board.
6. Slide the hood sensor switch mounted on the power supply towards the outside of the computer (1) and lower it through the slot (2).
To install the hood sensor, reverse the removal procedure.
The following security devices are used to prevent unauthorized access to the internal components of the computer and/or secure the computer to a fixed
object.
A special clip is required to secure the computer from intrusion. This clip must be installed before installing the computer cover.
Hood Sensor
External Security Devices
Security Clip
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The cable lock may be used to secure the computer access panel to the chassis and, at the same time, secure the computer to a fixed object.
Insert the cable lock in the location shown below.
A padlock may be used by itself to secure the access panel to the computer chassis. A padlock may also be used with a security cable to secure the
computer to a fixed object.
1. Prepare the computer for disassembly (Preparation for Disassembly).
  CAUTION: Before removing the computer cover, ensure that the computer is turned off and that the power cord is disconnected
from the electrical outlet.
2. Press the buttons on the left and right sides of the computer (1).
3. Slide the computer cover towards the front of the computer until it stops (2), then lift it up and off the chassis.
To install the computer cover, reverse the removal procedure.
Installing a Cable Lock
Installing a Padlock
Computer Cover
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1. Prepare the computer for disassembly (Preparation for Disassembly).
2. Remove the computer cover (Computer Cover).
3. Remove the drive bezel by pushing the top tab on the right side of the larger front bezel as shown (1) and rotating the drive bezel away from the larger
front bezel (2).
NOTE: The drive bezel will vary depending on the computer configuration.
4. Install a bezel or a bezel blank by pushing the bezel into place.
There are three drive bezel inserts that are available.
Front Drive Bezels
Item Description
1 Diskette drive bezel
2 Hard drive bezel
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The Small Form Factor chassis is a very compact computer and proper routing of the internal cables is critical to the operation of the computer. Follow
good cable management practices when working inside the computer.
Keep cables away from major heat sources like the heatsink.
Do not jam cables on top of expansion cards or memory modules. Printed circuit cards like these are not designed to take excessive pressure on them.
Keep cables clear of movable or rotating parts like the power supply and drive cage to prevent them from being cut or crimped when the component is
lowered into its normal position.
When folding a flat ribbon cable, never fold to a sharp crease. Sharp creases may damage the wires.
Some flat ribbon cables come prefolded. Never change the folds on these cables.
Do not bend any cable sharply. A sharp bend can break the internal wires.
Never bend a SATA data cable tighter than a 30 mm (1.18 in) radius.
Never crease a SATA data cable.
Do not rely on components like the drive cage, power supply, or computer cover to push cables down into the chassis. Always position the cables to lay
properly by themselves.
When removing the power supply power cables from the P1 connector on the system board, always follow these steps:
1. Squeeze on the top of the retaining latch attached to the cable end of the connector (1).
2. Grasp the cable end of the connector and pull it straight up (2).
  CAUTION: Always pull the connector - NEVER pull on the cable. Pulling on the cable could damage the cable and result in a failed
power supply.
System board connectors are color-coded to make it easier to find the proper connection.
Item Description
3 3.5” drive bezel
Cable Management
Cable Connections
Cable To Cable Designator
Power Supply System board, 24-pin P1
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The dx7300 and dc7700 series computers with Intel-based processors come with double data rate 2 synchronous dynamic random access memory (DDR2-
SDRAM) dual inline memory modules (DIMMs).
The memory sockets on the system board can be populated with up to four industry-standard DIMMs. These memory sockets are populated with at least
one preinstalled DIMM. To achieve the maximum memory support, you can populate the system board with up to 8 GB of memory configured in a high-
Cable To Cable Designator
Power Supply Diskette drive P2
Power Supply CPU power, 6-pin P3
Power Supply 1st SATA Hard drive P4
Power Supply 2nd SATA Hard drive P5
Power Supply Optical drive P7
Cable To PCA Designator
Diskette drive System board P10, FLOPPY (Black)
1st SATA Hard drive System board P60, SATA 0 (Dark Blue)
1st ODD or 2nd Hard drive if no ODD present System board P61, SATA 1 (White)
2nd SATA Hard drive if ODD present System board P62, SATA 2 (Light blue)
Serial port A System board P54, COM A
Serial port B System board P52, COM B
Hood lock solenoid System board P124, HLCK
Heatsink fan System board P8, CPU FAN
Hood Sensor System board P125, HSENSE
Front power button/LED System board P5, Pb/LED
Front I/O USB System board P24, FRNT USB (Yellow)
Speaker System board P6, SPKR
Front audio System board P23, FRTNT AUD, (Blue)
Chassis fan System board P9, CH FAN
Memory
DDR2-SDRAM DIMMs
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performing dual channel mode.
For proper system operation, the DDR2-SDRAM DIMMs must be:
industry-standard 240-pin
unbuffered PC2-4300 533 MHz-compliant, PC2-5300 667MHz-compliant, or PC2-6400 800 MHz-compliant
1.8 volt DDR2-SDRAM DIMMs
The DDR2-SDRAM DIMMs must also:
support CAS latency 4 (DDR2/533 MHz and DDR2/667 MHz) and CAS latency 5 (DDR2/667 MHz and DDR2/800 MHz)
contain the mandatory JEDEC SPD information
In addition, the computer supports:
256Mbit, 512Mbit, and 1Gbit non-ECC memory technologies
single-sided and double-sided DIMMs
DIMMs constructed with x8 and x16 DDR devices; DIMMs constructed with x4 SDRAM are not supported
NOTE: The system will not start if you install unsupported DIMMs.
There are four DIMM sockets on the system board, with two sockets per channel. The sockets are labeled XMM1, XMM2, XMM3, and XMM4. Sockets XMM1
and XMM2 operate in memory channel A. Sockets XMM3 and XMM4 operate in memory channel B.
Figure 1: DIMM Socket Locations
The system will automatically operate in single channel mode, dual channel mode, or flex mode, depending on how the DIMMs are
installed.
The system will operate in single channel mode if the DIMM sockets are populated in one channel only.
Populating DIMM Sockets
Item Description Socket Color
1 DIMM socket XMM1, Channel A Black
2 DIMM socket XMM2, Channel A White
3 DIMM socket XMM3, Channel B White
4 DIMM socket XMM4, Channel B White
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The system will operate in a higher-performing dual channel mode if the total memory capacity of the DIMMs in Channel A is equal to the total memory
capacity of the DIMMs in Channel B. The technology and device width can vary between the channels. For example, if Channel A is populated with two
256MB DIMMs and Channel B is populated with one 512MB DIMM, the system will operate in dual channel mode.
The system will operate in flex mode if the total memory capacity of the DIMMs in Channel A is not equal to the total memory capacity of the DIMMs in
Channel B. In flex mode, the channel populated with the least amount of memory describes the total amount of memory assigned to dual channel and
the remainder is assigned to single channel. For optimal speed, the channels should be balanced so that the largest amount of memory is spread
between the two channels. For example, if you are populating the sockets with one 1GB DIMM, two 512MB DIMMs, and one 256MB DIMM, one channel
should be populated with the 1GB DIMM and one 256MB DIMM and the other channel should be populated with the two 512MB DIMMs. With this
configuration, 2 GB will run as dual channel and 256 MB will run as single channel.
In any mode, the maximum operational speed is determined by the slowest DIMM in the system.
  CAUTION: The memory module sockets have gold metal contacts. When upgrading the memory, it is important to use memory
modules with gold metal contacts to prevent corrosion and/or oxidation resulting from having incompatible metals in contact with
each other. Static electricity can damage the electronic components of the computer or optional cards. Before beginning these
procedures, ensure that you are discharged of static electricity by briefly touching a grounded metal object. . When handling a
memory module, be careful not to touch any of the contacts. Doing so may damage the module.
1. If you have locked the Smart Cover Lock, use Computer Setup to unlock the lock (Unlocking the Smart Cover Lock).
2. Prepare the computer for disassembly (Preparation for Disassembly).
3. Remove the computer cover (Computer Cover).
  WARNING: To reduce risk of personal injury from hot surfaces, allow the internal system components to cool before touching.
4. Open both latches of the memory module socket (1), and insert the memory module into the socket (2).
NOTE: A memory module can be installed in only one way. Match the notch on the module with the tab on the memory socket.
5. Push the module down into the socket, ensuring that the module is fully inserted and properly seated. Make sure the latches are in the closed position
(3).
6. Repeat steps 4 and 5 for any additional modules that you want to install.
NOTE: The computer automatically recognizes the additional memory when the computer is turned on.
To reassemble the computer, reverse the removal procedure.
NOTE: If you normally lock the Smart Cover Lock, use Computer Setup to relock the lock and enable the Smart Cover Sensor.
Replacing Memory
Expansion Card Retainer
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1. If you have locked the Smart Cover Lock, restart the computer and enter Computer Setup to unlock the lock.
2. Turn off the computer properly through the operating system, then turn off any external devices.
3. Disconnect the power cord from the power outlet and disconnect any external devices.
4. Remove the computer cover (Computer Cover).
5. Release the slot cover retention latch that secures the PCI slot covers by lifting the green tab on the latch and rotating the latch to the full open position
(1).
6. Remove the single screw that keeps the card retainer in place (2) and slide the retainer to the left to remove it from the chassis (3).
To install the card retainer, reverse the removal procedure.
1. If you have locked the Smart Cover Lock, restart the computer and enter Computer Setup to unlock the lock.
2. Turn off the computer properly through the operating system, then turn off any external devices.
3. Disconnect the power cord from the power outlet and disconnect any external devices.
4. Remove the computer cover (Computer Cover).
5. Identify the slot into which you want to insert the expansion card.
6. Release the slot cover retention latch that secures the PCI slot covers by lifting the green tab on the latch and rotating the latch to the full open position
(1).
7. Remove the slot cover by sliding it up and out of the computer (2).
8. Install the expansion card by sliding the card under the slot cover retention latch then pressing the card down into the slot on the system board.
NOTE: Be sure not to scrape other components in the chassis when installing an expansion card.
PCI Expansion Card
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9. Rotate the slot cover retention latch back in place to secure the expansion card.
NOTE: When you install an expansion card, make sure the metal bracket on the card slides into the slot on the back of the computer
then press down firmly on the card so that the whole connector seats properly in the expansion card slot.
  CAUTION: All expansion card slots on the rear of the computer must contain either an expansion card or slot cover for proper
cooling of internal components during operation.
To remove a PCI Express expansion card:
1. If you have locked the Smart Cover Lock, restart the computer and enter Computer Setup to unlock the lock.
2. Turn off the computer properly through the operating system, then turn off any external devices.
3. Disconnect the power cord from the power outlet and disconnect any external devices.
4. Remove the computer cover (Computer Cover).
5. Release the slot cover retention latch on the back of the computer that secures the PCI slot covers by lifting the green tab on the latch and rotating the
latch to the open position.
6. Pull the retention arm on the back of the PCI Express expansion socket away from the card (on x16 card socket only) and carefully rock the card back and
forth until the connectors pull free from the socket. Pull the expansion card straight up from the socket then away from the inside of the chassis. Be sure
not to scrape the card against the other components.
7. If you are not installing a new expansion card, install an expansion slot cover to close the open slot.
8. Rotate the slot cover retention latch back in place to secure the expansion cards and expansion slot covers.
  CAUTION: All expansion card slots on the rear of the computer must contain either an expansion card or slot cover for proper
cooling of internal components during operation.
PCI Express Expansion Card
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1. If you have locked the Smart Cover Lock, use Computer Setup to unlock the lock (Unlocking the Smart Cover Lock).
2. Prepare the computer for disassembly (Preparation for Disassembly).
3. Remove the computer cover (Computer Cover).
4. Remove all PCI and PCI Express expansion cards from the PCI expansion slots (PCI Expansion Card and PCI Express Expansion Card).
5. Rotate the optical and diskette drive cage to its upright position.
6. Remove the security clip (Security Clip), rotate the power supply to its full upright position (1), then lift the power supply straight up and out of the
chassis (2).
7. Remove the SmartCover lock from the backwall of the chassis using the special security wrench and disconnect its cable from the system board
(Unlocking the Smart Cover Lock).
8. Disconnect the data and power cables from the system board.
9. Disconnect the “Serial A” cable from the system board, remove the two screws that secure the serial connector to the backwall, then remove the serial
connector.
PCI Riser Card Assembly and Backwall Need he
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10. Remove the fan shroud by lifting it up and out (Fan Shroud).
11. Remove the chassis fan (Chassis Fan).
12. Remove the long mounting screw that secures the system board tray to the chassis.
13. Slide the system board tray assembly towards the front of the chassis about 6 cm (1/4 inch) and lift the system board up and out of the chassis.
14. Remove the three screws that secure the backwall assembly to the chassis (1), then slide the backwall assembly a few millimeters/inches toward the
space vacated by the power supply and lift out (2).
15. Slide the new backwall onto the rear chassis (1). Secure it with the three screws removed from the old backwall (2).
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16. Install the serial connector into the new backwall using the two screws that were removed from the serial connector in a previous step. Reconnect the
“Serial A” cable to the system board.
17. Install the system board tray assembly. Be sure the keyhole slot on the system board sits properly over the locking pins. When the system board is in
position, replace the long mounting screw to secure the system board to the chassis.
18. Install the chassis fan and connect the control cable to the system board.
19. Reconnect all power and data cables to the system board. Be sure to use proper cable handling and placement precautions.
20. Install the power supply. Rotate it to its normal operating position. Be sure to use proper cable handling and placement precautions.
21. Install the full-height PCI expansion card in the available slot in the new PCI riser card cage assembly.
22. Install the new PCI riser card cage assembly on the new backwall by aligning the cage with the guide rails on the backwall. Press down firmly on the cage
to secure it in place on the backwall. Be sure the riser card in the cage is properly seated in the PCI expansion slot on the system board.
23. Rotate the drive cage back down to its normal position. Be sure to use proper cable handling and placement precautions.
  CAUTION: Cables are very sensitive. Overbending, creasing, or pinching can damage cables.
24. Replace the fan shroud on top of the fan.
25. Replace the computer cover.
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A Torx T-15 screwdriver is needed to remove and install the guide screws on a drive.
  CAUTION: Make sure personal files on the hard drive are backed up to an external storage device before removing the hard drive.
Failure to do so will result in data loss. After replacing the primary hard drive, you will need to run the Restore Plus! CD to load the HP
factory-installed files.
A 3.5-inch diskette drive, hard drive, or media card reader may be installed in this bay but the correct bezel must be installed to ensure
proper air flow.
To verify the type and size of the storage device installed in the computer, run Computer Setup.
  CAUTION: All removable media should be taken out of the drives before removing the drive from the computer.
NOTE: An optical drive is a CD-ROM, CD-R/RW, DVD-ROM, DVD+R/RW, or CD-RW/DVD Combo drive.
1. If you have locked the Smart Cover Lock, use Computer Setup to unlock the lock (Unlocking the Smart Cover Lock).
2. Prepare the computer for disassembly (Preparation for Disassembly).
3. Remove the computer cover (Computer Cover).
4. Rotate the drive cage to its upright position by pulling on the green-tabbed lip.
Drives
Drive Positions
Drive Positions
Item Description
1 3.5-inch, internal, standard hard drive bay
2 5.25-inch drive bay for optional drives
3 3.5-inch drive bay (1.44-MB diskette drive shown)
1
1
Optical Drive
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5. Disconnect the power and data cables from the rear of the optical drive.
6. Rotate the drive cage down to its normal position before trying to remove the drive.
7. Press the green drive retainer latch and slide the drive forward and lift it from the drive cage.
8. When replacing the drive, transfer the four screws from the old drive to the new one. The screws take the place of drive rails.
  CAUTION: Use only 5-mm long screws as guide screws. Longer screws can damage the internal components of the drive.
1. If you have locked the Smart Cover Lock, use Computer Setup to unlock the lock (Unlocking the Smart Cover Lock).
2. Prepare the computer for disassembly (Preparation for Disassembly).
3. Remove the computer cover (Computer Cover).
4. Remove the optical drive (Optical Drive).
5. Rotate the drive cage to its upright position by pulling on the green-tabbed lip.
6. Disconnect the signal (1) and power (2) cables from the drive. The other end of the cables should remain connected to the system board. (Diskette drive
is shown.)
External 3.5-inch Drive
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7. Rotate the drive cage down to its normal position before trying to remove the drive.
8. Press the green drive retention latch (1) located on the side of the diskette drive to disengage the drive from the drive cage and slide the diskette drive
forward approximately 6 mm (1/4 inch) (2).
9. Lift the rear of the drive up so that the rear guide screws clear the top of the drive cage (1). As the drive rises it automatically slides forward until it is free
from the drive cage (2).
To replace the drive, reverse the removal procedure making sure you rotate the rear of the drive down, pivoting on the front screws.
NOTE: When replacing the drive, transfer the four metric screws from the old drive to the new one. The screws take the place of drive
rails.
A Torx T-15 screwdriver is needed to remove and install the guide screws on a hard drive.
  CAUTION: Make sure personal files on the hard drive are backed up to an external storage device before removing the hard drive.
Failure to do so will result in data loss. After replacing the primary hard drive, you will need to run the Restore Plus! CD to load the HP
factory-installed files.
Primary Hard Drive
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  CAUTION: To prevent loss of work and damage to the computer or drive: If you are inserting or removing a hard drive, shut down
the operating system properly, then turn off the computer. Do not remove a hard drive while the computer is on or in standby mode.
Before handling a drive, ensure that you are discharged of static electricity. While handling a drive, avoid touching the connector.
Handle a drive carefully; do not drop it. Do not use excessive force when inserting a drive. Avoid exposing a hard drive to liquids,
temperature extremes, or products that have magnetic fields such as monitors or speakers.
1. If you have locked the Smart Cover Lock, use Computer Setup to unlock the lock (Unlocking the Smart Cover Lock).
2. Prepare the computer for disassembly (Preparation for Disassembly).
3. Remove the computer cover (Computer Cover).
4. Rotate the drive cage to its upright position by pulling on the green-tabbed lip.
NOTE: It is not necessary to remove the drives from the drive cage.
5. Remove the security clip that secures the backwall to the power supply.
6. Rotate the power supply to its full upright position.
7. Disconnect the power and data cables from the back of the hard drive.
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https://support.hp.com/us-en/product/hp-compaq-dc7700-small-form-factor-pc/3232029/document/c00862331#AbT11 19/29
8. Pull the tab that locks the drive in place away from the drive (1), slide the hard drive toward the front of the computer, then lift it up and out of the bay
(2).
To install a hard drive, reverse the above procedure.
NOTE: The replacement hard drive kit includes several data cables. Make sure to use the cable that is exactly the same as the factory-
installed cable. If the system has only one SATA hard drive, the data cable must be connected to the dark blue connector labeled
SATA0 first to avoid any hard drive performance problems. When replacing the hard drive, transfer the four screws from the old drive
to the new one. The screws take the place of drive rails. You will need a Torx T-15 screwdriver to remove and re-install the guide
screws. HP has provided four extra 6-32 standard guide screws on the front of the chassis, under the computer cover. The 6-32
standard guide screws are silver and are used only for the hard drive. If you replaced the primary hard drive, insert the Restore Plus!
CD to restore the operating system, software drivers, and any software applications that were preinstalled on the computer. Follow
the instructions in the guide included with the Restore Plus! CD. When the restore process has completed, reinstall any personal files
that you backed up before replacing the hard drive.
1. Prepare the computer for disassembly (Preparation for Disassembly).
2. Remove the computer cover (Computer Cover).
3. Lift up on the fan shroud (1), rotate the rear of the shroud up (2) (pivoting on its top front lip) and out of the chassis (3).
Fan Shroud
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12/16/2018 HP Compaq dc7700 Business PC - Removal and Replacement Procedures -- Small Form Factor (SFF) Chassis | HP® Customer Support
https://support.hp.com/us-en/product/hp-compaq-dc7700-small-form-factor-pc/3232029/document/c00862331#AbT11 20/29
When replacing the shroud, make sure that it does not get caught on the wires from either the fan or the speaker.
1. Prepare the computer for disassembly (Preparation for Disassembly).
2. Remove the computer cover (Computer Cover).
3. Remove the two screws that secure the front I/O device to the chassis (1).
4. Rotate the drive cage to its full upright position.
5. Disconnect the front I/O cable from the system board.
6. Push the front I/O device into the chassis (2) and snake the cable through the tunnel (3) to remove the device from the chassis.
To reinstall the front I/O device, reverse the removal procedure.
1. Prepare the computer for disassembly (Preparation for Disassembly).
2. Remove the computer cover (Computer Cover).
3. Remove the fan shroud (Fan Shroud).
4. Disconnect the fan control cable from the system board.
5. Loosen the four captive screws that secure the heatsink to the system board tray.
  CAUTION: Heatsink retaining screws should be removed in diagonally opposite pairs (as in an X) to even the downward forces on
the processor. This is especially important as the pins on the socket are very fragile and any damage to them may require replacing
the system board.
6. Lift the heatsink from atop the processor and set it on its side to keep from contaminating the work area with thermal grease.
Front I/O Devices
Heatsink
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