View Full Version : iMac lcd screen will not light up REALLY NEED YOUR HELP!!!

11-15-2017, 01:43 PM
Apple iMac27 i7 2011 3.4 Ghz

Only 3 led lights will come on!
I put in new power supply!
I put in new backlight board!
I bought another monitor!
I got new 3 new ribbons.

Computer starts with external monitor works fine.
I while ago I put in monitor ribbon that has a pin missing it went black after a few minutes.
Since then the screen will not light up.
I tried everything I can think of
Have you ever run into this or heard of this problem.

So Im thinking it the old ribbon did something to the motherboard.
I took out motherboard it looks good no bulging capacitors or leaks but i did notice a little white residue on front of motherboard under 2 capacitors.
very little.

Im trying to fix this myself never done this before.
I have been working on it for months learning as I go..
Any ideas.
I am really getting depressed over this.
I dont have anymore money I live on fixed income.
This is the only computer I have.

I appreciate your interest I am not a technician DYI
In fact Im using it with my tv monitor now!


11-15-2017, 07:23 PM
Welcome to our forums.

You might want to go to www.ifixit.com and take a look at their take apart and fix instructions. Good luck.