Try an Open Firmware reset of the video RAM.
snip
set-defaults
reset-nvram
reset-all
Just to head off future confusion, I'll be pedantic here.
This procedure dies NOT reset the 'video RAM'. That is volatile,
its contents go away when the computer shuts down.
OK, here is the status so far;
All of the troubleshooting have done in the past on this iMac has been
in the dark, now in the daylight the "white screen" looks sort of grey.
I was able to boot it into Open Firmware, I actually could see the
words on the iMac screen. So I issued the above statements one at a
time, hitting return after each one, no help, still a white/grey screen
I have reset the PRAM using Option-Apple-P-R and let it bong 4 times,
same result.
Hooking up an external monitor shows "input signal out of range", that
is on 2 different 15" flat panel LCD monitors, one is an NEC and the
other is a Compaq. I have no other monitors in the house to test with.
I have been holding down the C key when trying to boot, i am pretty
sure that I dont need to at this point because I should be getting the
folder icon that comes up when it can't find a boot device.
I have also removed and reseated the RAM. And I actually have removed
the third party RAM and left in just the 128mb of Apple branded RAM.
Still the same result.
I removed the battery, it is definitely bad, it tested at 0.66 v DC,
and is supposed to be 3.6 v DC. I tried to boot it without the battery
and have gotten the same white/grey screen result.
I appreciate all of your time and advice.
What should I try next?
Thanks,
Kevin
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