LCD Backlight not working = solved
I have an iMac 2009, 21,5" which has been working well until last week. First there was some flickering and sometimes a black display. Since yesterday the display seems not to work anymore.
I have found the apple technicians guide for this iMac online and tried some of the solutions described there. I did a SMC/PVRAM Reset, but this did not solve the problem.
To determine if it's the gpu I connected an external monitor -> everyhing working fine on the external monitor.
It seems that the LED backlight isn't working anymore, because if you use a flashlight you can see everything on the internal screen.
I asked at a local repair store but they told me (without looking at the device...) that it was either the LCD panel, which would cost almost 500€/650$ to replace or the SATA/Board (Logic board?) which would even be more expensive.
My question is whether it's possible to determine if it is the logic board, ta cable connection, the Backlight controller or the LCD-Panel.
Thanks fpr your answers,
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