October 27th, 2004, 07:08 PM #1
Bad CRT or video board on iMac
This is the problem. The iMac (G3, 400MHz, blueberry) boots fine but the display is a deep purple and very high contrast. Just about impossible to make out anything on the screen.
What could be going on? Bad CRT or video board? How would I go about diagnosing the problem?
Thanks for any help with this.
October 27th, 2004, 08:32 PM #2
I remember something like this happening if you didn't install an iMac G3 firmware upgrade before installing some flavor of OS X.
Does this sound like something you're experiencing:
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October 28th, 2004, 01:34 PM #3
Thanks diablo. The link was very helpful. I now suspect that the video board is deffective. eBay has a few listings for these boards. How difficult would be to replace the video board? Are there instructions on how to crack the iMac and replace the board?
October 28th, 2004, 01:45 PM #4
You can download a Service Manual for your machine HERE
October 28th, 2004, 02:13 PM #5
Thanks Bob. Great manual!!