iMac Powers Up, Black Screen and Not display at all
I had this iMac 24" A1200 which has defective Video card. The computer has worked but has pixels and artifacts when using a little bit of graphics.
I had send the VGA card for a reballing and we change the GPU and when it comes back, the iMac show LED1 OK; LED2 OK; but LED3 and LED4 are not lightning.
The iMac has open; black screen and the power button is "ON". All fans are working in maximum and something is not working properly.
I had purchase another video card which i think its that the problem, but the video card has the same results.
The video card which i purchase, it come from another "iMac" which is the logic board capacitors is defective, the pc was just rebooting.
Now i would like to know, what can i do more? i've try SMD reset, nothing happen.
No chime. All capacitors on mine is look good (no bursted capacitors).
Can something get wrong with the logic card?
Is this a good question?