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4. If the controller test runs without errors, the drive
read/write tests start automatically.
5. If the drive test detects an error, FRU code 50 for
FDD-1; or 51 for FDD-2 appears. If the diskette itself
is known to be good, replace the drive.
6. If FDD-2 test detects an error, move the drive to the
computer's diskette drive connector directly, if
possible, and test it again as FDD-1.
If no errors occur in the FDD-1 position, the drive is
not defective. Go to “Port Replicator Checkout” in
“Common Devices Checkout” section to isolate the
replicator problem.
7. If the drive is attached through an Expansion Unit, go
to the service manual of the Expansion Unit to isolate
the problem.
8. If the drive is attached through a Diskette Drive
Attachment Unit, replace the unit.
If an error occurs when the external diskette drive is
attached through the external diskette drive connector and
there is not a diskette drive in the UltraBay, reseat the
connector on the video card. If the error still remains,
reseat the external diskette drive connector. If the error
still remains, replace the following FRUs one at a time:
1. External diskette drive kit
2. Video card
3. External diskette drive connector
LCD Information Panel Checkout
If an LCD information panel problem occurs, do the
following:
1. Power-off the computer.
2. Power-on the computer.
3. All the icons in the LCD information panel appear for
a moment soon after the computer is powered-on.
Verify that all icons appear correctly.
If some of the icons do not appear, replace the
keyboard.
If the problem still remains, replace the video card.
Power Systems Checkout
To verify the symptom of the problem, power-on the
computer using each of the power sources as follows:
1. Remove the battery pack, diskette drive, and hard
disk drive.
2. Connect the AC Adapter and check that power is
supplied.
3. Install the diskette drive or hard disk drive one at a
time, and check that power is supplied from each
power source.
ThinkPad 760 (9546, 9547)
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