Undetermined Problems - Lenovo 90H9 Hardware Maintenance Manual

• Checks some basic system-board operations
• Checks that the memory is working correctly
• Starts video operations
• Verifies that the boot drive is working
POST Error Message
Keyboard error
Reboot and Select proper Boot device or
Insert Boot Media in selected Boot device

Undetermined problems

1. Power-off the computer.
2. Remove or disconnect the following components (if connected or installed)
one at a time.
a. External devices (modem, printer, or mouse)
b. Extended video memory
c. External Cache
d. External Cache RAM
e. Hard disk drive
f. Disk drive
3. Power-on the computer to re-test the system.
4. Repeat steps 1 through 3 until you find the failing device or component.
If all devices and components have been removed and the problem continues,
replace the system board.
Description/Action
Cannot initialize the keyboard. Make sure
the keyboard is properly connected to the
computer and that no keys are held
pressed during POST. To purposely
configure the computer without a
keyboard, select Keyboardless operation
in Startup option to Enabled. The BIOS
then ignores the missing keyboard during
POST.
The BIOS was unable to find a suitable
boot device. Make sure the boot drive is
properly connected to the computer. Make
sure you have bootable media in the boot
device.
Chapter 6. Symptom-to-FRU Index
25