eMachines EL1358G eMachines EL1358 Service Guide - Page 64

Beep Codes When no error message is displayed but the computer stops during POST, listen for beep codes. Beep One short beep. Continuous one long beep Status System ready Memory not installed or memory error One long beep, then VGA not installed or two short beeps and VGA error repeat One long beep, then BIOS failure one short beep Two short beeps. CMOS failure Possible Causes System is OK. • Something is wrong with the memory installed • There is problem accessing the memory (i.e., mainboard problem) • The mainboard can not access the video card for some reasons. Either the video card is not working, its memory is not accessible, or its BIOS may be corrupt. • Something is wrong with the mainboard. BIOS damaged. Processor jump to boot block to execute the default procedure. CMOS checksum error Undetermined Problems NOTE • Verify that all attached devices are supported by the computer. • Verify that the power supply being used at the time of the failure is operating correctly. (See "Power System Check" on page 41) Follow the procedures below to isolate the failing FRU. Do not isolate non-defective FRU. 1. Power off the computer. 2. Visually check them for damage. If any problems are found, replace the FRU. 3. Remove or disconnect all of the following devices: • Non-Acer devices • Printer, mouse, and other external devices • Hard disk drive • DIMM • CD/DVD-ROM drive • Expansion boards 4. Power on the computer. 5. Determine if the problem has been resolved. 6. If the problem does not recur, reconnect the removed devices one at a time until you find the failed FRU. If the problem persists, replace the mainboard, and then LCD assembly (one at a time). Do not replace a non-defective FRU. 56 EL1358 Service Guide