2014 A1419 iMac 27" Backlight dead

[PetrusdeW]

Hi,

I need help please. I have a mid 2014 27" (A1419) iMac, Was working on it when I heard a "Click" from inside the mac, (Like a fuse blowing), next thing the display faded and went dark. Computer still running, but no display. Restarted with the same results. (After searching the net and forums) shone a light on the screen and could see the menu's and desktop. I connected the iMac with screen sharing (via network) to my Macbook pro and it appears that everything on the iMac is running fine. I could even run my regular Apps via screen sharing and access my files. When I go to "about this mac" on the shared desktop and access the diagnostic panel, it reports "Passed".

An educated guess would be the backlight as the culprit.

Question 1. Does the backlight circuit on this model have a fuse?, If that is the case, what is location and what would the rating be?

Question 2. If no fuse, would it be possible to replace / repair the backlight board / circuit without replacing the complete Lcd screen?

Question 3. In the event that I am mistaken on my diagnosis, any suggestions on where to start looking for a problem?

Thank you in advance for the help.

Regards
Peter

 

[Raz0rEdge]

The backlight is built into the LCD and generally doesn't have a fuse. There will wires coming from the display panel and going to the logicboard for power to both the backlight and LCD panel as well the data cable. If you bought AppleCare before the first year ran out, you might still be within the 3 year period and if that is the case, you should promptly take the iMac to your closest Apple store to have them take a look at it and replace the LCD panel for you..

If you are out of warranty, the you're likely looking at a LCD panel replacement..

 

[chscag]

Some added info: The display on your iMac is of the bonded type where the screen and glass are bonded together. And as our moderator told you, the backlight is built in which requires the entire display to be changed out. Another member recently received an estimate from Apple for changing out the retina display: $500 to $600.

 

[bbnck]

I recently had the LCD panel replaced on my Late 2015 27-inch iMac as it was suffering from image retention. I had it replaced under warranty but on the paperwork I received back from the Apple Authorised Service Provider, it advised the repair cost would have come to about £450 had it not been under warranty. Just mentioning this in case anyone in the UK is wondering how much Apple might charge if the LCD panel needs to be replaced. The fact the display is bonded together with the glass must make it more expensive to replace.

If you live in the EU and your Apple Limited Warranty or AppleCare Protection Plan has expired, you may still have a right to request Apple repair or replace the damaged part free of charge (i.e. a statutory claim). In the UK, these rights are governed under the Sale of Goods Act 1979 and provides consumer protection for up to six years in England and Wales, and five years in Scotland. If you make a statutory claim after your complementary warranty runs out, Apple can (but not necessarily would) ask you to prove the fault existed at the time of purchase. In other words, that there was a problem to begin with that is responsible for the fault later on. This is because the law requires the consumer to prove the fault existed at the time of purchase after six months into the contract for the claim to be legally valid.

Bottom line: if you're in the EU, try pressing your legal rights before accepting a repair charge.