iMac G5 PowerMac wont boot up
When I try to boot up iMac G5 PowerMac, it turns on the sleep light, no screen and then all of the fans get into turbo mode. Please help!!
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Is the light blinking in a pattern?
Fans will come on full speed if no OS is loaded to control them.
Can you count the beeps or flashes?
1 beep = no RAM installed
2 beeps = incompatible RAM types
3 beeps = no good banks
4 beeps = no good boot images in the boot ROM (and/or bad sys config block)
5 beeps = processor is not usable
In addition to the beeps, on some computers the power LED will flash a corresponding number of times plus one. The LED will repeat the sequence after approximately a 5-second pause. The tones are only played once.
Note: In this case, a flash is considered to be 1/4 second or 250 ms or greater in length.
http://support.apple.com/kb/HT1547
Does anything show on screen if you hold alt key at bootup?