Acer Extensa 4420 TravelMate 4520/4220, Extensa 4420/4120 Service Guide - Page 81

Error Message DMA Test Failed Software NMI Failed Fail-Safe Timer NMI Failed Device Address Conflict Allocation Error for device Failing Bits: nnnn Fixed Disk n Invalid System Configuration Data I/O device IRQ conflict Operating system not found FRU/Action in Sequence DIMM System board DIMM System board DIMM System board Run the Setup Utility, then press F9 to load the system defaults. RTC battery System board Run the Setup Utility, then press F9 to load the system defaults. RTC battery System board DIMM BIOS ROM System board None BIOS ROM System board Run the Setup Utility, then press F9 to load the system defaults. RTC battery System board Run the Setup Utility and see if fixed disk and drive A: are properly identified. Diskette drive Hard disk drive System board System Error - No Beep Error Message No beep, power indicator turns off and the LCD screen is blank. No beep, power indicator turns on but the LCD screen is blank. FRU/Action in Sequence Power source (battery pack and power adapter). Refer to the "Power System Check" section on page 67. Ensure every internal cables are properly and securely connected. Reinstall the memory module. System board. Power source (battery pack and power adapter). Refer to the "Power System Check" section on page 67. Reconnect the LCD-CCD cable. Hard disk drive LCD-CCD cable Inverter board LCD panel System board Chapter 4 71