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Current version by: oldturkey03 (vote details) ,

Title:

How do I diagnose a dud graphics card

Text:

Daughters machine arrived for dad to fix. Won't start. Partner admitted to mucking about with the OS. Re installed 10.7 worked OK. Next day wouldn't fire up again. Reinstalled the OS, and heaps of other software. seemed sluggish so opted for a reboot. Wouldn't start again. Option D at start up shows the curser (moves with mouse) but no options (HD, optical disk or USB). Screen is backlit. Disassemble, clean everything (with vacuum) look for damage with magnifying glass. Put back together, leaving bezel off. Start, option D, same as before. 4 leds light up green, power suply fan can be seen spinning. Can hear HD and optical drives spin up and do the expected thing. Screen is backlit and curser shows (and moves) but nothing else is visible. Tried pressing enter and using arrows to select imagined options, no joy.

Serial number ends with KVGN

Device:

iMac Intel 24" EMC 2111

Status:

open

Accepted Answer:

123193

Edit by: originalmachead ,

Title:

How do I diagnose a dud graphics card

Text:

Daughters machine arrived for dad to fix. Won't start. Partner admitted to mucking about with the OS. Re installed 10.7 worked OK. Next day wouldn't fire up again. Reinstalled the OS, and heaps of other software. seemed sluggish so opted for a reboot. Wouldn't start again. Option D at start up shows the curser (moves with mouse) but no options (HD, optical disk or USB). Screen is backlit. Disassemble, clean everything (with vacuum) look for damage with magnifying glass. Put back together, leaving bezel off. Start, option D, same as before. 4 leds light up green, power suply fan can be seen spinning. Can hear HD and optical drives spin up and do the expected thing. Screen is backlit and curser shows (and moves) but nothing else is visible. Tried pressing enter and using arrows to select imagined options, no joy.
 
Serial number ends with KVGN

Device:

iMac Intel 24" EMC 2111

Status:

open

Edit by: Abe ,

Title:

How do I diagnose a dud graphics card

Text:

Daughters machine arrived for dad to fix. Won't start. Partner admitted to mucking about with the OS. Re installed 10.7 worked OK. Next day wouldn't fire up again. Reinstalled the OS, and heaps of other software. seemed sluggish so opted for a reboot. Wouldn't start again. Option D at start up shows the curser (moves with mouse) but no options (HD, optical disk or USB). Screen is backlit. Disassemble, clean everything (with vacuum) look for damage with magnifying glass. Put back together, leaving bezel off. Start, option D, same as before. 4 leds light up green, power suply fan can be seen spinning. Can hear HD and optical drives spin up and do the expected thing. Screen is backlit and curser shows (and moves) but nothing else is visible. Tried pressing enter and using arrows to select imagined options, no joy.
Serial number ends with KVGN

Device:

iMac Intel 24" EMC 2111 Serial number ends with KVGN
iMac Intel 24" EMC 2111 Serial number ends with KVGN

Status:

open

Original post by: Abe ,

Title:

How do I diagnose a dud graphics card

Text:

Daughters machine arrived for dad to fix. Won't start. Partner admitted to mucking about with the OS. Re installed 10.7 worked OK. Next day wouldn't fire up again. Reinstalled the OS, and heaps of other software. seemed sluggish so opted for a reboot. Wouldn't start again. Option D at start up shows the curser (moves with mouse) but no options (HD, optical disk or USB). Screen is backlit. Disassemble, clean everything (with vacuum) look for damage with magnifying glass. Put back together, leaving bezel off. Start, option D, same as before. 4 leds light up green, power suply fan can be seen spinning. Can hear HD and optical drives spin up and do the expected thing. Screen is backlit and curser shows (and moves) but nothing else is visible. Tried pressing enter and using arrows to select imagined options, no joy.

Device:

iMac Intel 24" EMC 2111 Serial number ends with KVGN

Status:

open