Display shows vertical stribes - what have failed?
I´ve read hours worth of forum posts regarding this and similar issues with the display but still not sure how to proceed.
It shows 5 vertical stribes immediately and after Apple logo it stalls at a white/grey screen.
Can boot in safe mode - stribes still there and depending on the background they can appear green and other colors.
Screenshot does NOT show stribes!
External display WILL show stribes.
iMac used as a display - NO errors on screen.
Those green diagnose led lamps (through vent holes) seems to turn on all 4 of them even though I´m having a hard time being 100% sure of the no 4 led.
Boot from a clean 10.10.2 external HD makes no difference to the above mentioned.
Have pulled out the graphics card and sav a little smudge on the connector pin - cleaned it (with clean air) and reaseambled. Still same problem.
I where preparing my self to put my graphics card in the oven or buy a new/replacement one but I´m not sure that it is with the graphics card alone or something else might be causing this. I´m understanding it as my screen shoot should show the error stribes as well, should this be a graphics card failure.
Is this a good question?