Won't turn on with display panel connected
Just wondering if you can help me to figure out the problem with my iMac.
It tries to turn on but shuts down very fast as soon as it tries to turn on display. I opened the iMac and when I connect the power cord first LED of the Logic board turns on. When I press the power button second and third LED turn on. Then computer shuts down as soon as it tries to turn on the display. I disconnected the display backlight cable from the PSU and computer turns on with no problem without backlight. Then I decided to reconnect backlight cable to PSU and computer turns on without any problems. I used the computer for 2 days. I shut it off and on for several times with no issue. The problem starts again when I don't turn the computer on for several hours. Then I must to the same steps again to push it to work.
Do you think that it's PSU problem?
Thanks a lot