2009 iMac 27" A1312 EMC 2374 powers on with chime but no display
I have a 2009 27" iMac which powers on to a black screen.
Without the graphics card plugged in (no screen attached) iMac does the following:
Powers on
Chimes
Hard drive boot sound
Optical drive noise
Diagnostic led's 1&2 are lit
Fans start spinning
With graphics card plugged in(no screen attached) it does the following:
Powers on
No chime
Hard drive makes a short noise
Optical drive noise
Only diagnostic led 1 is on
Fans start spinning
With graphics card plugged in(screen attached) it does the following:
Powers on
No chime
Hard drive makes a short noise
Optical drive noise
Only diagnostic led 1 is on
Fans start spinning
Black screen
No indication of desktop when I place a flashlight close to the screen
Connected external monitor ..no display
I have tried two graphics cards ATI Radeon HD 4670 and AMD Radeon HD 4850 but no display.
Performed an oven bake on both GPU 's at 200 Celsius for 8 minutes. Tried again with no luck.
Could anyone with further knowledge kindly assist me.
Это хороший вопрос?
1 Комментарий
Thank you for the reply and information. Both GPU boards I believe are original for the 2009 27" iMac at least the 4670 GPU. I purchased the iMac and the previous owner told me that he had ordered a repacement GPU but he had no luck.
из jnicus