horizontal and vertical lines keeps on increasing
Hi,
I own a late 2009 21.5inch iMac (ATI4670) which has similar issues. The number of horizontal and vertical lines keeps on increasing. When running the apple test tool no issues are found.
I once took it to an apple dealer for analysis and they said the logic board was faulty, producing lots of errors.
Now since then ( 1year later) this Mac still runs but connected to a more ugly 2nd screen via the displayport/HDMI without those lines. I am running constantly SMCFan because I am convinced this iMac can produce too much heat before the fan starts working.
The flickering of vertical lines seems even influenced by the sound!
I haven't yet replaced anything in this iMac but I am quite interested in what could be the real cause of all this.
kr,
Peter
Questa è una buona domanda?