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Service Hints & Tips

Document ID: GSMH-3F5JMW

IBM PC/IBM IntelliStation - Keyboard/printer/display checkout

Applicable to: World-Wide

Keyboard:

Note: If a mouse or other pointing device is attached, remove it to see if the error symptom goes away. If the symptom goes away, the mouse or pointing device is defective.

Printer:

1.

Make sure the printer is properly connected and powered on.

2.

Run the printer self-test. If the printer self-test does not run correctly, the problem is in the printer. Refer to the printer service manual. If the printer self-test runs correctly, install a wrap plug in the parallel port and run the diagnostic tests to determine which FRU failed. If the diagnostic tests (with the wrap plug installed) do not detect a failure, replace the printer cable. If that does not correct the problem, replace the system board or adapter connected to the printer cable.

Display:
If the screen is rolling, replace the display assembly. If that does not correct the problem, replace the video adapter (if installed) or replace the system board.

If the screen is not rolling, do the following to run the display self-test:

1.	Power-off the computer and display.
2.	Disconnect the display signal cable.
3.	Power-on the display.
4.	Turn the brightness and contrast controls clockwise to their maximum setting.
5.	Check for the following conditions: You should be able to vary the screen intensity by adjusting the contrast and brightness controls. The screen should be white or light gray, with a black margin (test margin) on the screen.

Note: The location of the test margin varies with the type of display. The test margin might be on the top, bottom, or one or both sides.

If you do not see any test margin on the screen, replace the display. If there is a test margin on the screen, replace the video adapter (if installed) or replace the system board.

Note: During the first two or three seconds after the display is powered on, the following might occur while the display synchronizes with the computer. Unusual patterns or characters Static, crackling, or clicking sounds A power-on hum on larger displays A noticeable odor might occur on new displays or displays recently removed from storage. These sounds, display patterns, and odors are normal; do not replace any parts.

If you are unable to correct the problem, go to Undetermined Problem.

	Search Keywords
	Hint Category	Hardware Maintenance Information
	Date Created	13-03-97
	Last Updated	19-11-98
	Revision Date	09-11-99
	Brand	IBM PC, IBM IntelliStation
	Product Family	PC 300GL, PC 300XL, PC 300PL, PC 330, PC 340, PC 350, PC 360, PC 365, PC 730, PC 750, M Pro, Z Pro, E Pro
	Machine Type	6272, 6275, 6282, 6285, 6284, 6561, 6591, 6588, 6562, 6592, 6862, 6892, 6571, 6573, 6575, 6576, 6577, 6560, 6581, 6583, 6585, 6586, 6587, 6598, 6589, 6875, 6876, 6877, 6885, 6886, 6887, 6888, 6889, 6898, 6899, 6893
	Model	Various
	TypeModel
	Retain Tip (if applicable)	N/A
	Reverse Doclinks and Admin Purposes