Aspire 4720, G, Z, 4320 Service Guide
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...Power System Check" on . LCD inverter ID LCD cable LCD inverter LCD System board Reconnect the LCD connector LCD inverter ID LCD cable LCD inverter LCD System board LCD inverter ID LCD inverter LCD cable LCD System board Indicator-Related Symptoms Symptom / Error Action in characters Abnormal...system. Reconnect the LCD connectors. Battery pack Power adapter Hard drive & battery connection board System board Power source (battery pack and power adapter). Keyboard (if contrast and brightness function key doesn't work LCD is too dark LCD brightness cannot be adjusted LCD contrast ...
...Power System Check" on . LCD inverter ID LCD cable LCD inverter LCD System board Reconnect the LCD connector LCD inverter ID LCD cable LCD inverter LCD System board LCD inverter ID LCD inverter LCD cable LCD System board Indicator-Related Symptoms Symptom / Error Action in characters Abnormal...system. Reconnect the LCD connectors. Battery pack Power adapter Hard drive & battery connection board System board Power source (battery pack and power adapter). Keyboard (if contrast and brightness function key doesn't work LCD is too dark LCD brightness cannot be adjusted LCD contrast ...