Troubleshooting Power-On Self Test/ - 19
2 Beeps:
EDO memory is installed. (The iMac ships with
SDRAM SO-DIMMs and does not accept EDO memory).
3 Beeps:
No RAM banks passed memory testing.
4 or 5 Beeps:
Bad checksum for the remainder of the boot ROM.
The ROM (which is located on the processor module) is bad.