TravelMate 4520/4220, Extensa 4420/4120 Service Guide
Page 87
... system defaults. LCD-CCD cable Inverter board LCD panel System board Reconnect the LCD-CCD cable. Hold and press the power button for your problem condition is too dark LCD brightness cannot be adjusted LCD contrast cannot be adjusted Unreadable LCD screen Missing pels in Sequence... Power source (battery pack and power adapter). Keyboard (if contrast and brightness function key doesn't work LCD is not listed in Sequence Run the Setup Utility, then press F9 to the "Undetermined Problems" section on page 67. Battery won't ...
... system defaults. LCD-CCD cable Inverter board LCD panel System board Reconnect the LCD-CCD cable. Hold and press the power button for your problem condition is too dark LCD brightness cannot be adjusted LCD contrast cannot be adjusted Unreadable LCD screen Missing pels in Sequence... Power source (battery pack and power adapter). Keyboard (if contrast and brightness function key doesn't work LCD is not listed in Sequence Run the Setup Utility, then press F9 to the "Undetermined Problems" section on page 67. Battery won't ...