Chosen Solution
As soon as I put my GPU in I’m getting only 1 led light on. If I remove the GPU two led lights are on. I tried two different GPU cards and the same things happened. With the external monitor plugged in I’m getting the 3 leds on. So strange. Did anyone experience similar things. Thanks in advance.
SME? I opened the iMac to see what’s wrong and therefore i removed and changed the graphic card. While no screen attached I wanted to run it and see how many leds were on hence the possibly confusing conclusion. I am no expert so maybe my explanation wasn’t the best.
