Backlight turning off, inverter-board changed
Hi, my late 2009 iMac 27" is killing me. Display goes black 10 times a day. When I hold a flashlight to the screen I can see stuff on the screen. External Monitor works fine. Regarding to some other articles on ifixit, the backlightboard should be damaged.
So i ordered one from the US (I´m in germany) and replaced the old one... same failure *crying loud*.
Do you think i should change the backlight cable also? I can only find one on the internet and thats &##* expensive (more expensive then the board itself). Where do you guys get those cables?
Does anyone know why the display is turning off in such irregular intervals? Is it a heatproblem??
Maybe i should plug out the display-thermal-sensor-cable an see if it is still turning off?!
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Start by resetting the SMC - http://support.apple.com/kb/HT3964 See if that sets things right. Without knowing which model you have we can't answer this - Please give us the last four digits of your serial number so we can correctly identify your system.
thx Dan, already resetted the SMC multiple times. My Serial ends with 55PJ.
iMac "Core i5" 2.66 27"
Model No: A1312 (EMC 2374)
Just to make sure were on the right track here. Your system has LED backlighting not CFL's. So to be clear here you replaced the display LED backlight unit 'backlighting board' as well as the LED driver board 'inverter changed' correct?
I only changed the LED-Driver-Board by following this guide: iMac Intel 27" EMC 2309 and 2374 LED Driver Board Replacement
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