Lenovo ThinkPad 770 Hardware Maintenance Manual for 770 series notebooks(Janua - Page 52
RUNNING THE DIAGNOSTICS, USB card in the docking station, CD-ROM drive, External CD-ROM drive
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RUNNING THE DIAGNOSTICS FRU Code 75 90 91 92 93 FRU USB card in the docking station CD-ROM drive External CD-ROM drive DVD drive External DVD drive If the problem persists after replacement of the FRUs, go to the "Undetermined Problems" section for each model. 46
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RUNNING THE DIAGNOSTICS
If the problem persists after replacement of the FRUs, go
to the “Undetermined Problems” section for each model.
FRU Code
FRU
75
USB card in the docking station
90
CD-ROM drive
91
External CD-ROM drive
92
DVD drive
93
External DVD drive
46