Lenovo ThinkPad 760E ThinkPad 380, 385, 560, 560E, all 760, 765 and SelectADoc - Page 441
Power Management Features, Configuration program.
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If the problem persists after the replacement, replace the system board. 11. If power problems appear only when the replicator is used, replace the replicator. External Display Self-Test: If the display problem occurs only when using an external display, use the following instruction to correct the problem. Note: Before you replace a display, check that the 95XX systems support either 63XX, 85XX, or 95XX displays to see if it is connected correctly. If the screen is rolling, replace the external display. If that does not correct the problem, replace the FRUs in the following order until the problem goes away: 1. Video card 2. System board 3. Bus adapter (if used) If the screen is not rolling, run the display self-test as follows: 1. Power-off the computer and display. 2. Disconnect the display signal cable. 3. Power-on the display 4. Set the contrast to its maximum position. 5. Set the brightness control to the center detent position. Check for the following conditions: You should be able to vary the screen intensity by adjusting the contrast and brightness control. The screen should be white or light gray, with a black margin (test margin) on the screen. The screen is set to CRT or both by the ThinkPad Configuration program. 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 a test margin on the screen, replace the display. If there is a test margin on the screen, replace the system board. Power Management Features Three power management modes are provided by the computer to reduce power consumption and prolong battery power. Standby Mode: In standby mode the following occurs: The LCD backlight turns off. The hard disk motor stops. Events that cause the computer to enter standby mode: ThinkPad 765D (9546), 765L (9547) 429