Beep Codes; Undetermined Problems - eMachines EL1358 Service Manual

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
One long beep, then
two short beeps and
repeat
One long beep, then
one short beep
Two short beeps.

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.
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Status
System ready
Memory not installed or
memory error
VGA not installed or
VGA error
BIOS failure
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
EL1358 Service Guide