Lenovo ideacentre 200, Hardware Maintenance Manual, Page: 81 / 140

Message/Symptom FRU/Action
Serial or parallel connector device failure
(system board connector) 1. External Device Self-Test OK?
2. External Device
3. Cable
4. System Board
Serial or parallel connector device failure
(adapter connector) 1. External Device Self-Test OK?
2. External Device
3. Cable
4. Alternate Adapter
5. System Board
Some or all keys on the keyboard do not
work 1. Keyboard
2. Keyboard Cable
3. System Board
Undetermined problems
This section provides instructions on how to find out the failing devices or
adapters.
1. Power-off the computer.
2. Remove or disconnect the following components (if installed) one at a time.
a. Any adapters
b. Diskette drive
c. External Cache
d. External Cache RAM
e. External devices (modem, printer, or mouse)
f. Extended video memory
g. Memory modules
h. Storage drive
3. Power-on the computer to re-test the system.
4. Repeat steps 1 through 3 until you find the failing device or adapter.
If all devices and adapters have been removed, and the problem continues,
replace the system board. See “Replacing the system board” on page 104.
Overview of the USB recovery shim
You can use a USB recovery shim (hereafter referred to as the recovery shim) as a
recovery solution in the Chrome OS operating system.
The recovery shim is a bootable device that is required to service the computer.
The recovery shim is used for the following purposes:
Chapter 8. Service checkout and symptom-to-FRU index
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