TravelMate 4320/4720 and Extensa 4220/4620 Service Guide
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... inverter LCD Mainboard Reconnect the LCD connector LCD inverter ID LCD cable LCD inverter LCD Mainboard LCD inverter ID LCD inverter LCD cable LCD Mainboard Indicator-Related Symptoms Symptom / Error Indicator incorrectly remains off or on, but system runs correctly Action in ... 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). Action in characters Abnormal screen Wrong color displayed LCD has extra horizontal or vertical lines displayed. Battery pack Power adapter...
... inverter LCD Mainboard Reconnect the LCD connector LCD inverter ID LCD cable LCD inverter LCD Mainboard LCD inverter ID LCD inverter LCD cable LCD Mainboard Indicator-Related Symptoms Symptom / Error Indicator incorrectly remains off or on, but system runs correctly Action in ... 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). Action in characters Abnormal screen Wrong color displayed LCD has extra horizontal or vertical lines displayed. Battery pack Power adapter...