
Diagnostic text messages ....................91
Viewing the test log ......................92
Diagnostic messages .....................92
Recovering from a Lenovo ThinkServer Server Firmware update failure . . . 124
Solving power problems .....................125
Solving Ethernet controller problems ................125
Solving undetermined problems ..................126
Problem determination tips ....................127
Chapter 6. Locating Server Controls and connectors .........129
Front view ..........................129
Operator information panel ...................129
EasyLED diagnostics panel ...................131
Rear view ..........................132
System-board internal connectors .................133
System-board external connectors .................135
System-board switches and jumpers ................135
System-board LEDs ......................137
SAS backplane connectors ....................141
Power-supply LEDs.......................141
Internal LEDs, connectors, and jumpers ...............142
System-board internal connectors ................143
System-board switches and jumpers ...............146
System-board LEDs .....................147
System-board external connectors ................148
2.5-inch hard disk drive backplane connectors ............149
Server power features ......................149
Turning on the server .....................149
Turning off the server .....................150
Chapter 7. Installing optional devices and replacing customer replaceable
units ...........................151
Server components .......................151
Opening the bezel .......................152
Closing the bezel .......................153
Removing the bezel ......................154
Installing the bezel .......................156
Opening the bezel media door...................157
Closing the bezel media door ...................158
Removing the left-side cover ...................159
Installing the left-side cover ....................160
Opening the power-supply cage ..................160
Closing the power-supply cage ..................162
Turning the stabilizing feet ....................164
Internal cable routing and connectors ................165
Removing the air baffle .....................171
Installing the air baffle ......................172
Removing the fan-cage assembly .................173
Installing the fan-cage assembly ..................174
Removing the battery ......................174
Installing the battery ......................175
Removing a hot-swap power supply.................176
Installing a hot-swap power supply .................177
Installing redundant power supply and fans ..............179
Removing a voltage regulator module ................181
Installing a voltage regulator module ................182
iv ThinkServer TD200x Types 3719, 3821, 3822, and 3823: Hardware Maintenance Manual