Wire routing of video inverter causing jerky video?
Thanks to iFixit's replacement guide, I was able to remove and repair the bulging capacitors on my logic board that prevented boot up of my iMac. In the process, I may have caused another problem - jerky video while viewing YouTube (or any other video file). Let's start at the beginning: The iMac stopped booting up, no B/U chime, no fan, no video. I removed the logic board and repaired the caps. Reassembled. Booted with 3 LEDs but no backlight. Desktop behavior seemed fine using a flashlight. Initial boot problem fixed. Researched backlighting problem and found out about the inverter. Took the inverter out and found that the subsequent backlight problem was due to the inverter cable coming unseated during the initial (bootup) repair. Re-installed the original inverter and now the computer boots fine and has backlighting. The only problem now is jerky, frozen, video (as if you had a very slow Internet connection). The audio to the videos are fine. The audio does not lag at all. I'm wondering if somehow I could have pinched or mis-routed an inverter wire during reassembly, or do I need to order an inverter. I am traveling and want to have a plan when I get back home. Thanks very much!
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댓글 4개
Since the mac is old, it may just not be powerful enough to play YT. Have you tried running ASD(apple support diagnostics) and seeing if you get any sensor errors or other messages?
echow2001 의
I have not done ASD and will do so, thanks. It doesn't matter what video is playing (a file on the HDD or web) the problem occurs. Didn't do that before it stopped booting (2 months ago).
ccarlley 의
That probably isn't a problem with backlight inverter, more likely the GPU. If it also happens with external monitor you can be sure that it is not the backlight inverter or LCD.
Run ASD and also this: http://www.geeks3d.com/gputest/
echow2001 의
Completely ignorant until now of what the inverter does. Thanks for that info AND the GPU test link. I neglected to say in the original post that I only changed the five bulging caps and not all of them. Knowing that the GPU is on the logic board, that (as Mayer has suggested) is probably my issue.
ccarlley 의