Lenovo ThinkPad 380ED ThinkPad 385 User's Guide - Page 170
LCD Blank or Power-On Problems, Problem, Action, Enter, KB OK, Power Shutdown
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Troubleshooting LCD Blank or Power-On Problems Problem The screen is blank and there are no beeps. Note: If you are not sure about the beeps, turn the computer off; then turn it on again, and listen for the beeps. The screen is blank and there is one beep. Note: If you are using an external monitor, go to "External Monitor Problems" on page 155. The screen is blank and there is a continuous beep, or two or more beeps. Only the cursor appears. xxxxx KB OK appears and the computer halts. The screen is unreadable or distorted. Incorrect characters appear on the screen. The screen stays on although the power switch is turned off. Action Verify that: The battery pack is correctly installed. The AC Adapter is connected to the computer and the power cord is plugged into a working electrical outlet. The computer power switch is turned on. If the preceding items are correct and the screen remains blank, have the computer serviced. If a power-on password is set, press any key to display the power-on password prompt and then type the correct password and press Enter (see page 74). If a power-on password is not set, verify that the brightness control on the computer is correctly adjusted. If the preceding items are correct and the screen remains blank, have the computer serviced. Have the computer serviced. Reinstall your operating system and turn on the computer. If there is still a problem, have the computer serviced. Have the computer serviced. Verify that: The ThinkPad display driver is installed correctly (refer to Chapter 7 for installation instructions). The refresh rate settings in the ThinkPad Features program's display setup screen (under the Advanced... button) are set to your display resolution and color type. Verify that operating systems and application programs have been installed and configured correctly. If so, have the computer serviced. Press the Power Shutdown switch on the bottom of the computer with the tip of a pen or, disconnect the AC Adapter and remove the battery pack to turn off the computer. Then turn the computer on again. 150 IBM ThinkPad 385 or 385D User's Guide