crwdns2934065:0crwdne2934065:0: 459
7
13
Hi,
This iMac has no backlight anymore. the diagnostic leds are all oké. Is this a broken lcd or is this a logic board problem?
Thx for the reply
crwdns2934109:0crwdne2934109:0
crwdns2934065:0crwdne2934065:0: 478,9crwdns2936485:0crwdne2936485:0
35
329
970
Sadly, this implies your logic board needs repair. Either a fuse link or more likely the backlight LED driver burnt.
crwdns2934105:0crwdne2934105:0
I did the test with the external display and this is working fine... So still the fuse or backlight LED driver?
Without opening and testing things out I'm just guessing here ;-} The good news its' not as bad as it could be!
You'll need to find someone with the needed skills & tools to dig into repairing your logic boards backlight circuit. This is beyond most DIY and you would still need to find the needed parts which can be tough.
crwdns2936751:024crwdne2936751:0 0
crwdns2936753:07crwdne2936753:0 0
crwdns2936753:030crwdne2936753:0 1
crwdns2942667:0crwdne2942667:0 949
crwdns2944067:03crwdne2944067:0
Using a flashlight can you see the faint image of your desktop icons? You'll need to hold the flashlight at a sharp angle resting on the screen to see.
You might also want to check things using an external monitor as well.
Let us know what you find!
crwdns2934271:0crwdnd2934271:0 Dan crwdne2934271:0
Yeah, I can see the desktop icons with A flaslight. Will try with an external monitor
crwdns2934271:0crwdnd2934271:0 Mattis crwdne2934271:0
Sadly, Dan is completely wrong. It doesn't imply there's a problem with the board at all. The problem is within the screen. How do I know? Because I've replaced a few and there's never been a board problem yet.
What I need to find out is if it's possible to refit a backlight from one with a broken glass onto one with the backlight problem. I have both in stock now.
crwdns2934271:0crwdnd2934271:0 Baggy cat crwdne2934271:0