Apple emac ati usb2 2005 Servicehandbuch
eMac ATI Graphics /USB 2.0/2005 Troubleshooting -
17
General Information
Power-On Self Test
There is a power-on self test that resides in the ROM of the eMac. This test automatically runs
whenever the eMac is powered on after being fully shut down (the power-on self test does not run
if the machine is only restarted).
whenever the eMac is powered on after being fully shut down (the power-on self test does not run
if the machine is only restarted).
If a problem is detected during the test, you will not hear a normal startup chime. Instead, the
system will beep as explained below. Refer to “Error Beeps” later in this chapter for instructions
on how to troubleshoot and repair an eMac that sounds error beeps at startup time.
system will beep as explained below. Refer to “Error Beeps” later in this chapter for instructions
on how to troubleshoot and repair an eMac that sounds error beeps at startup time.
Following is a definition of what the error beeps at startup time signify.
One Beep:
No RAM is installed or detected.
Two Beeps:
Incompatible memory is installed. (The slots accept standard PC-100 or PC-133,
168-pin DIMMs).
Three Beeps:
No RAM banks passed memory testing.
Four or Five Beeps:
Bad checksum for the remainder of the boot ROM. The ROM is bad.