If no errors occur in the FDD-1 position, the drive is
not defective. Go to “Port Replicator Checkout” on
page 428 to isolate the replicator problem.
10. If the drive is attached through an Expansion Unit, go
to the service manual of the Expansion Unit to isolate
the problem.
11. If the drive is attached through a Diskette Drive
Attachment Unit, replace the unit.
12. If no error occurred when testing the formatted
diskette, suspect the diskette that was used when the
customer reported the problem.
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 persists, reseat
the external diskette drive connector. If the error persists,
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 persists, replace the video card.
Fan Checkout
To check the fan, do the following:
1. Turn off the computer.
2. Remove the following FRUs (see “FRU Removals and
Replacements” on page 454):
a. Diskette drive/CD-ROM drive
b. Battery pack
c. Hard disk drive
d. Top cover
e. Keyboard unit
3. Attach the AC Adapter to the computer.
4. Applying a short across the two pads with a screw
driver as shown below, turn on the computer.
ThinkPad 765D (9546), 765L (9547)
421
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