1 No backlight 2 seconds after powering up.
Imac G5 20" intel/iSight model A1207
After powering up the iMac, I get for two seconds normal screen, then it turns black, boot noises are normal, no other anomalies.
video signal is present, I checked the screen with flashlight and can see faint text and graphics.
Putting it into sleepmode, after waking up it gives 2 second normal screen than it turns black again...
Already opened it and checked caps on PSU, inverter board and MOB, visually no suspicious parts present, the 3 diagnostic LED's are all lit.
Am I missing something here, or can this only be the backlight tube?
Would appreciate some advice here, want to keep this oldie running for sentimental reasons...
crwdns2934109:0crwdne2934109:0
crwdns2889612:0crwdne2889612:0
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crwdns2944067:03crwdne2944067:0
Failure is probable due to backlight inverter, and not tubes; replacement of inverter ought to resolve the issue.
crwdns2934271:0crwdnd2934271:0 Annie Ryan crwdne2934271:0
Thanks for your answer, I'm going to look for a good replacement inverter....!
crwdns2934271:0crwdnd2934271:0 Appeltje crwdne2934271:0
New developments with a happy end...
I ordered a used, but working inverter on eBay, and tried out if that would be the culprit...
Unfortunately it was not.
I searched for a similar G5 and found one which was dead but had a similar display as mine.
I switched it with mine and voila, back to life!
Probably it were the CCFL lamps who were both faulty at the same time....lesson learned.
Nevertheless I have now a spare inverter...;-))
crwdns2934271:0crwdnd2934271:0 Appeltje crwdne2934271:0