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clear the CMOS memory; see “System-board switches and jumpers” on page 31. If
you suspect that the server firmware is damaged, see “Recovering the server
firmware” on page 152.
Check the LEDs on all the power supplies. If the LEDs indicate that the power
supplies are working correctly, do the following:
1. Turn off the server.
2. Make sure that the server is cabled correctly.
3. Remove or disconnect the following devices, one at a time, until you find the
failure. Turn on the server and reconfigure it each time.
v Any external devices.
v Surge-suppressor device (on the server).
v Modem, printer, mouse, and non-Lenovo devices.
v Each adapter.
v Hard disk drives.
v Memory modules. The minimum configuration requirement is two 1 GB DIMM
on the system board.
The following minimum configuration is required for the server to start:
v One microprocessor
v One 1 GB DIMM on the system board
v One power supply
v Power cord
v ServeRAID SAS/SATA adapter
v System board
4. Turn on the server. If the problem remains, suspect the following components in
the following order:
a. Memory module
b. Microprocessor
c. System board
If the problem is solved when you remove an adapter from the server but the
problem recurs when you reinstall the same adapter, suspect the adapter; if the
problem recurs when you replace the adapter with a different one, suspect the
system board.
If you suspect a networking problem and the server passes all the system tests,
suspect a network cabling problem that is external to the server.
Solving SCSI problems
Note: This information also applies to Serial Attached SCSI (SAS) problems.
For any SCSI error message, one or more of the following devices might be
causing the problem:
v A failing SCSI device (adapter, drive, or controller)
v An incorrect SCSI termination jumper setting
v A missing or incorrectly installed SCSI terminator
v A defective SCSI terminator
v An incorrectly installed cable
v A defective cable
For any SCSI error message, follow these suggested actions in the order in which
they are listed until the problem is solved:
174 ThinkServer TD200 Types 3724, 3808, 3809, 3815, 3817, 3824, 3826, 3836: Installation and User Guide