Help diagnose AOC e2350sd monitor horizontal line
Hi forum friends,
A friend bought this working AOC lcd monitor and used it without problem for less than 6 months. Yesterday he brought to me and said it has a horizontal line now and will auto shut off in less than 2 minutes. Btw he had decided to dump it if not repairable. As a friend, i tried my best to help and after opening the case i don' t see anything burned or parts having cold solder joint.
Fyi, most of the electrolytic caps are tested within 5% range on esr reading except that i changed cap at c918(680uf reads 654.3uf) to a 1000uf cap. Also i added a 680uf 25v cap at c921 for voltage boost if that helps.
Other that what i had done, i have no more clue as to why the horizontal line is still there and still with auto shut off issue. I would appreciate if someone with experience and patience can kindly guide as what to check and do to bring this monitor to normal working condition. Thanking in advance.
A friend bought this working AOC lcd monitor and used it without problem for less than 6 months. Yesterday he brought to me and said it has a horizontal line now and will auto shut off in less than 2 minutes. Btw he had decided to dump it if not repairable. As a friend, i tried my best to help and after opening the case i don' t see anything burned or parts having cold solder joint.
Fyi, most of the electrolytic caps are tested within 5% range on esr reading except that i changed cap at c918(680uf reads 654.3uf) to a 1000uf cap. Also i added a 680uf 25v cap at c921 for voltage boost if that helps.
Other that what i had done, i have no more clue as to why the horizontal line is still there and still with auto shut off issue. I would appreciate if someone with experience and patience can kindly guide as what to check and do to bring this monitor to normal working condition. Thanking in advance.
Attached Files
But today, I’m making an exception here. Why? No idea. Perhaps only because the repair details are still “fresh” in my head… which is ironic, given this is a 16 year old monitor that hardly anyone will care about today. It is new to me, though. 
I picked it up last November from someone on my local Craigslist. It wasn’t very close to where I live, but was close to a family friend that I had to go visit anyways. So after watching the posting on Craigslist for a few weeks and seeing it getting...
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