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Versione corrente di: Dan ,

Testo:

Exact same problem on a 27” 2009 iMac. I use the same workaround of keyboard strokes to force the display asleep and then wake with another keystroke. The screen runs OK for very long periods at low light settings and is more prone to failure when set at mid to higher light settings. I replaced the inverter board with a used one but the problem got much worse!! I could hardly keep the display illuminated for a second before it went black at any light settings.
Exact same problem on a 27” 2009 iMac. I use the same workaround of keyboard strokes to force the display asleep and then wake with another keystroke. The screen runs OK for very long periods at low light settings and is more prone to failure when set at mid to higher light settings. I replaced the inverter board with a used one but the problem got much worse!! I could hardly keep the display illuminated for a second before it went black at any light settings.
 
ElectrolyticThe screen runs OK for very long periods at low light settings and is more prone to failure when set at mid to higher light settings. I replaced the inverter board with a used one but the problem got much worse!! I could hardly keep the display illuminated for a second before it went black at any light settings.

Electrolytic
capacitors on the inverter board might be the culprit. Caps are notorious for failing with age. I see four large electrolytic caps on my board. Perhaps

Perhaps
I should acquire some spares and see if that fixes the problem. AnyoneAnyone had success fixing this issue.issue?
ElectrolyticThe screen runs OK for very long periods at low light settings and is more prone to failure when set at mid to higher light settings. I replaced the inverter board with a used one but the problem got much worse!! I could hardly keep the display illuminated for a second before it went black at any light settings.

Electrolytic
capacitors on the inverter board might be the culprit. Caps are notorious for failing with age. I see four large electrolytic caps on my board. Perhaps

Perhaps
I should acquire some spares and see if that fixes the problem. AnyoneAnyone had success fixing this issue.issue?

Stato:

open

Post originale di: Charles ,

Testo:

Exact same problem on a 27” 2009 iMac.  I use the same workaround of keyboard strokes to force the display asleep and then wake with another keystroke.  The screen runs OK for very long periods at low light settings and is more prone to failure when set at mid to higher light settings.  I replaced the inverter board with a used one but the problem got much worse!! I could hardly keep the display illuminated for a second before it went black at any light settings.

Electrolytic capacitors on the inverter board might be the culprit.   Caps are notorious for failing with age.  I see four large electrolytic caps on my board.  Perhaps I should acquire some spares and see if that fixes the problem.  Anyone had success fixing this issue.

Stato:

open