Skip to main content
Help

Current version by: Niels ,

Title:

Backlight not functioning properly

Text:

Hello all,
 
I have this iMac 14.1 and the backlight is not functioning properly. If i turn on the mac i have to wait 5-10 minutes before the backlight turns on, after that the mac works fine. If i restart the iMac the screen backlight is fine and keeps lit up, its only when its fully asleep.
 
Anyone have an idea of how to fix this problem?
 
Kind regards,
 
Niels

=== Update (06/13/2018) ===

I wanted to update this thread because maybe it will help someone one day. So i thought it was a back light problem ( witch it seemed like) but that was not the case. I called an Apple Tech and he told me it might be an logic board issue. Rented a screen from them to test if that screen worked on my iMac and it did. So i bought an all new screen, did not work. Then i though it might be the temperature sensor that attaches to the screen I tried a new temperature sensor, that also did not work. Turns out when i turned the video transmission cable around, it worked perfectly. So i am assuming that the cable got damaged somehow and that it makes good contact the other way around.
Niels

=== Update (06/13/2018) ===

I wanted to update this thread because maybe it will help someone one day. So i thought it was a back light problem ( witch it seemed like) but that was not the case. I called an Apple Tech and he told me it might be an logic board issue. Rented a screen from them to test if that screen worked on my iMac and it did. So i bought an all new screen, did not work. Then i though it might be the temperature sensor that attaches to the screen I tried a new temperature sensor, that also did not work. Turns out when i turned the video transmission cable around, it worked perfectly. So i am assuming that the cable got damaged somehow and that it makes good contact the other way around.

dispositivo:

iMac Intel 21.5" EMC 2805

Status:

open

Accepted Answer:

488471

Edit by: Niels ,

Title:

Backlight not functioning properly

Text:

Hello all,

I have this iMac 14.1 and the backlight is not functioning properly. If i turn on the mac i have to wait 5-10 minutes before the backlight turns on, after that the mac works fine. If i restart the iMac the screen backlight is fine and keeps lit up, its only when its fully asleep.

Anyone have an idea of how to fix this problem?

Kind regards,

Niels

dispositivo:

iMac Intel 21.5" EMC 2805

Status:

open

Accepted Answer:

488471

Original post by: Niels ,

Title:

Backlight not functioning properly

Text:

Hello all,

I have this iMac 14.1 and the backlight is not functioning properly. If i turn on the mac i have to wait 5-10 minutes before the backlight turns on, after that the mac works fine. If i restart the iMac the screen backlight is fine and keeps lit up, its only when its fully asleep.

Anyone have an idea of how to fix this problem?

Kind regards,

Niels

dispositivo:

iMac Intel 21.5" EMC 2805

Status:

open