Lenovo ThinkPad T61 6458 Hardware Maintenance Manual page 36

5. Follow the instructions on the screen. If there is a problem, PC-Doctor shows
6. To exit the test, select Quit — Exit Diag.
Note: After running PC-Doctor, check the time and date on the system and reset
them if they are incorrect.
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ThinkPad T61 and T61p (15.4-inch widescreen) Hardware Maintenance Manual
messages describing it.
To cancel the test, press Esc.