Acer Chromebook C934 User manual

Acer Chromebook
C934/C934T/CB314-3H/CB314-3HT
LIFECYCLE EXTENSION
GUIDE

i
Self-Repair . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1
Disassembly Procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2
Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-29
FRU (Field Replaceable Unit) List . . . . . . . . . . . . . . . . . . . . . . . . . . 1-33
Exploded Diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-34
Check for updates yourself. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-37
Factory reset your Chromebook. . . . . . . . . . . . . . . . . . . . . . . . . . . 1-38

Self-Repair 1-1
Self-Repair
This chapter highlights the limited self-repair capabilities of the product.
Prior performing self-repair, familiarize yourself with the Safety Guidelines and
Recommended Equipment sections first as described in the chapter "Disassembly
Procedures".
Depending on model, the following key components are eligible for self-repair (if
applicable);
Battery pack
HDD / SSD module
DIMM module(s)
WLAN module
LTE module
If a particular key component is listed and thus would be eligible for self-repair, but is
not described in the "Disassembly Procedures" section, then this component is either not
present on the respective model, or it is present but embedded on the motherboard and
therefore not eligible for self-repair.
NOTE:
NOTE:
Do not attempt to replace other components than those listed above.
NOTE:
NOTE:
For replacement parts, always use only Acer certified components in order to
safeguard quality, optimum system performance, stability and reliability of the
product.
NOTE:
NOTE:
Any damage to the product that occur during self-repair, or which has occurred as
a result of a careless or unsuccessful self-repair attempt, is not covered by the
standard product warranty.
Software Recovery 0
This product has embedded software recovery tools which can be used to either perform
a partial or full software recovery, but also to create a Factory Default recovery media.
For more information about the software recovery options, how to perform a software
recovery or creating a Factory Default recovery media, please refer to the chapter
"Recovery" which is available in the User Manual of the product.
NOTE:
NOTE:
In the event of not being able to create a Factory Default recovery media, it is
possible to obtain a copy of the recovery media through Acer Customer Service
(http://www.acer.com/support)
This is not a free of charge service.

1-2 Disassembly Procedures
Disassembly Procedures
Safety Guidelines 0
This chapter contains step by step procedures on how to remove and de-install
components from the computer. Use the following safety guidelines to ensure your
personal safety. Each procedure included in this chapter assumes that you are preparing
your computer for recycling and disposal. By performing any of these procedures you
acknowledge that any remaining warranty applicable to your computer will be voided.
Before you start any of the procedures in this chapter, make sure to read the following
safety guidelines and the respective instructions within the chapter.
CAUTION!
Turn off your computer and disconnect all power sources before opening the
computer cover or panels.
To avoid electrostatic discharge, ground yourself by using a wrist grounding strap
or by periodically touching an unpainted metal surface at the same time as
touching a connector on the back of the computer.
Take off any metal objects on your arms or fingers such as bracelets, rings or
watches and make sure your hands are completely dry. Even if your unit is
unplugged, there may still be some remaining electric charge.
If a component does not come out easily, do not forcefully remove it. Instead,
check that you are removing it correctly and that no wires or other parts are in the
way.
When you disconnect a cable, pull on its connector or on its pull-tab, not on the
cable itself. Some cables have connectors with locking tabs; if you are
disconnecting this type of cable, press in on the locking tabs before you disconnect
the cable.
Recommended Equipment 0
The following equipment are recommended to do the following maintenance
procedures:
Wrist grounding strap and conductive mat
Flat screwdriver
Philips screwdriver
Polydrive screwdriver
Plastic tweezers
Flat plastic pry

Disassembly Procedures 1-3
WEEE Annex VII Component 0
These components are classified as requiring selective treatment:
Battery pack
Touchpad module
USB board
Mainboard
LCD panel

1-4 Disassembly Procedures
Pre-disassembly Instructions 0
Do the following prior to starting any maintenance procedures:
1. Place the system on a stable work surface.
2. Remove the power adapter from the USB Type-C port (A or B) as shown in Figure 1-1
or Figure 1-2.
Figure 1-1. AC Adapter Outlet
3. Remove all cables from system.
4. Remove the microSD card from the microSD card slot (C) (Figure 1-2).
Figure 1-2. AC Adapter Outlet and MicroSD Card Removal
NOTE:
NOTE:
Make sure the system is completely powered off.
A
B C

Disassembly Procedures 1-5
Base Cover Removal 0
1. Remove ten (10) screws from the base cover (Figure 1-3).
Figure 1-3. Base Cover Removal
2. Carefully pry up the base cover starting from the upper edge to release the latches as
shown in Figure 1-4.
Figure 1-4. Base Cover Removal

1-6 Disassembly Procedures
3. Continue to release the remaining latches on the upper, left, right, and bottom sides.
Then grasp and remove the base cover from the system (Figure 1-5).
Figure 1-5. Base Cover Removal

Disassembly Procedures 1-7
Battery Pack Removal 0
Prerequisite:
Base Cover Removal
1. Find the battery pack (A) on the top assembly (Figure 1-6).
2. Detach the insulator mylar (B) and the tape (C) securing the cables (Figure 1-6).
Figure 1-6. Battery Pack Removal
3. Disconnect the battery cable (D) from the mainboard connector (Figure 1-7).
Figure 1-7. Battery Pack Removal
A
BC
D

1-8 Disassembly Procedures
4. Remove the battery pack from the top assembly (Figure 1-8).
Figure 1-8. Battery Pack Removal
IMPORTANT:
+
Follow local regulations for battery disposal.
WEEE Annex VII
Component: Battery Pack

Disassembly Procedures 1-9
Touchpad Module Removal 0
Prerequisite:
Battery Pack Removal
1. Detach the adhesive tape (A) securing the cable connection (Figure 1-9).
Figure 1-9. Touchpad Module Removal
2. Disconnect the touchpad FFC (B) from the touchpad module and mainboard
connectors. Then remove the touchpad FFC from the top assembly (Figure 1-10).
Figure 1-10. Touchpad Module Removal
A
B

1-10 Disassembly Procedures
CAUTION:
!
Touchpad FFC (Flexible Flat Circuit) can be damaged if removed while the
touchpad module connector and the mainboard connector are locked.
3. Lift slightly the keyboard FPC (C). Then detach the conductive tape (C) from the
touchpad module and top assembly (Figure 1-11).
Figure 1-11. Touchpad Module Removal
4. Remove three (3) screws securing the touchpad module (Figure 1-12).
Figure 1-12. Touchpad Module Removal
C
D

Disassembly Procedures 1-11
5. Using the screwdriver, push the guide pins (F) firmly to release them from the top
assembly (Figure 1-13).
6. Slide the touchpad module slightly to disengage it from the bottom latches (F), and
then remove the touchpad module (G) from the top assembly (Figure 1-13).
Figure 1-13. Touchpad Module Removal
G
H
WEEE Annex VII Component:
Touchpad Module
EEE
H

1-12 Disassembly Procedures
USB Board Removal 0
Prerequisite:
Battery Pack Removal
1. Remove three (3) screws (A) securing the right LCD hinge (Figure 1-14).
Figure 1-14. USB Board Removal
2. Lift the top assembly until it is fully open (Figure 1-15).
Figure 1-15. USB Board Removal
A

Disassembly Procedures 1-13
3. Close the top assembly and lift the right LCD hinge until it is fully extended
(Figure 1-16).
Figure 1-16. USB Board Removal
4. Disconnect the 20-pin USB board FFC from the mainboard connector (B) and the USB
board connector (C). Then remove the 20-pin USB board FFC (Figure 1-17).
5. Disconnect the 50-pin USB board FFC from the mainboard connector (D) and the USB
board connector (E). Then remove the 50-pin USB board FFC (Figure 1-17).
6. Disconnect the G-sensor board FFC from the USB board connector (F) (Figure 1-17).
7. Remove one (1) screw (G) securing the USB board (Figure 1-17).
Figure 1-17. USB Board Removal
E
B
D
F
C
G

1-14 Disassembly Procedures
CAUTION:
!
USB board FFC (Flexible Flat Circuit) and G-sensor board FFC can be damaged
if removed while the mainboard connector and the USB board connector are
locked.
8. Release the USB board (H) from the USB ports slots and guide pin (I) on the top
assembly. Then remove the USB board (Figure 1-18).
Figure 1-18. USB Board Removal
WEEE Annex VII Component:
USB Board
I
H

Disassembly Procedures 1-15
Mainboard Removal 0
Prerequisite:
Battery Pack Removal
1. Remove three (3) screws (A) securing the left LCD hinge (Figure 1-19).
Figure 1-19. Mainboard Removal
2. Lift the top assembly until it is fully open (Figure 1-20).
Figure 1-20. Mainboard Removal
A

1-16 Disassembly Procedures
3. Close the top assembly and lift the left LCD hinge until it is fully extended
(Figure 1-21).
Figure 1-21. Mainboard Removal
4. Disconnect the 20-pin USB board FFC from the mainboard connector (B) (Figure 1-22).
5. Disconnect the 50-pin USB board FFC from the mainboard connector (C) (Figure 1-22).
6. Disconnect the touchpad FFC from the mainboard connector (D) (Figure 1-22).
7. Disconnect the keyboard FPC from the mainboard connector (E) (Figure 1-22).
8. Disconnect the WLAN antennas cables from the WLAN module connectors (F)
(Figure 1-22).
9. Disconnect the speaker cable from the mainboard connector (G) (Figure 1-22).
10. Disconnect the eDP cable from the mainboard connector (H) (Figure 1-22).

Disassembly Procedures 1-17
11. Remove four (4) screws (I) securing the mainboard (Figure 1-22).
Figure 1-22. Mainboard Removal
CAUTION:
!
USB board FFC (Flexible Flat Circuit), touchpad FFC, and keyboard FPC
(Flexible Printed Circuit) can be damaged if removed while the mainboard
connector is locked.
12. Release the mainboard (J) from the I/O ports slots and guide pins (K) on the top
assembly. Then remove the mainboard (Figure 1-23).
Figure 1-23. Mainboard Removal
CAUTION:
!
Make sure all cables, FFCs, and FPC are disconnected from the connectors on
the mainboard to avoid damage during removal.
E
D
B
C
F
G
H
I
WEEE Annex VII Component:
Mainboard
J
K

1-18 Disassembly Procedures
Figure 1-24. Mainboard
IMPORTANT:
+
Circuit boards >10 cm² have been highlighted with a yellow rectangle as
shown in Figure 1-24. Remove the circuit board and follow local
regulations for disposal.