Acer Extensa 4220 TravelMate 4320/4720 and Extensa 4220/4620 Service Guide - Page 109

Error Message List No beep Error Messages FRU/Action in Sequence No beep, power-on indicator turns off and LCD is blank. Power source (battery pack and power adapter). See "Power System Check" on page 95.. Ensure every connector is connected tightly and correctly. Reconnect the DIMM. LED board. Mainboard. No beep, power-on indicator turns on and LCD is blank. Power source (battery pack and power adapter). See "Power System Check" on page 95.. Reconnect the LCD connector Hard disk drive LCD inverter ID LCD cable LCD Inverter LCD Mainboard No beep, power-on indicator turns on and LCD is blank. But you can see POST on an external CRT. Reconnect the LCD connectors. LCD inverter ID LCD cable LCD inverter LCD Mainboard No beep, power-on indicator turns on and a Ensure every connector is connected tightly and correctly. blinking cursor shown on LCD during POST. Mainboard No beep during POST but system runs correctly. Speaker Mainboard Chapter 4 99