No video signal to display socket. No problem with external display.
Dear Ifixit team,
My 2010 iMac does not power up the display. I’ve checked the ribbon cable and connectors. Everything is fine. I’ve measured the signals to the display. It seems that there is no video signal. There is no boot fault sound. The iMac is working except the display, it’s working on the external display like a charm. I’ll appreciate any solution, advice, schematic and etc. Thanks in advance!