Hey guys, I have been lurking your forums for a while now but I'm kind of shy about posting. I have had marginal success repairing lcd displays and tv's. Usually I find bad caps or transformers, using existing forums as a guide. I have the common hand tools, a soldering iron, a digital multimeter that can test capacitance, though not an ESR. I really enjoy repairing things and you guys do great work.
I tend to find tv's in the electronics bin at the local dumps. They don't like that I take them so I try to get them on the sly. I do not resale the tv's and displays as I'm not confident enough in my repair work to know that I'm not selling someone a POS that will die in a month. The tv's and displays I have repaired are being put to good use in my home and have been working for nearly a year though. I do have a few projects that I was hoping to get into with you guys, one is a 42" vizio that would be a huge upgrade for the living room. Another is a 32" emerson that would replace my son's 19" dynex.
My question for today though involves the sharp LC-26DV24U. When I rescued it from the dump I found it had a good picture, but no sound. No big deal, I'll use it for a display and replace the two 19" one's I currently use. I used it for about a week and suddenly while working on homework the screen went completely white. I searched the forums, did some testing, downloaded the service manual, but I haven't gotten anywhere. So while I was troubleshooting I noticed I only have 110v line voltage at the receptacle. I left it on for a while and the display came back. I got my meter out again and noticed the line voltage had climbed to 115v. It seemed fine for a few hours then it went white screen again, the line voltage was 119v this time. I tried kicking it with the cover both on and off but no avail. J/K
So I'm wondering if any one has had experience with displays that are particularly sensitive to voltage fluctuations. I couldn't find a spec sheet that tells what % above and below 120v is acceptable. All the nameplate says is 120v~. Is this observation totally irrelevant or are there parts I should be able to pinpoint based on this observation?
Even if I do get the display working I would need to troubleshoot the sound as well :\ To be honest, I would rather work on the vizio first, but I thought this was interesting and worth asking you guys.
Thanks for all you do.
Boonami
I tend to find tv's in the electronics bin at the local dumps. They don't like that I take them so I try to get them on the sly. I do not resale the tv's and displays as I'm not confident enough in my repair work to know that I'm not selling someone a POS that will die in a month. The tv's and displays I have repaired are being put to good use in my home and have been working for nearly a year though. I do have a few projects that I was hoping to get into with you guys, one is a 42" vizio that would be a huge upgrade for the living room. Another is a 32" emerson that would replace my son's 19" dynex.
My question for today though involves the sharp LC-26DV24U. When I rescued it from the dump I found it had a good picture, but no sound. No big deal, I'll use it for a display and replace the two 19" one's I currently use. I used it for about a week and suddenly while working on homework the screen went completely white. I searched the forums, did some testing, downloaded the service manual, but I haven't gotten anywhere. So while I was troubleshooting I noticed I only have 110v line voltage at the receptacle. I left it on for a while and the display came back. I got my meter out again and noticed the line voltage had climbed to 115v. It seemed fine for a few hours then it went white screen again, the line voltage was 119v this time. I tried kicking it with the cover both on and off but no avail. J/K
So I'm wondering if any one has had experience with displays that are particularly sensitive to voltage fluctuations. I couldn't find a spec sheet that tells what % above and below 120v is acceptable. All the nameplate says is 120v~. Is this observation totally irrelevant or are there parts I should be able to pinpoint based on this observation?
Even if I do get the display working I would need to troubleshoot the sound as well :\ To be honest, I would rather work on the vizio first, but I thought this was interesting and worth asking you guys.
Thanks for all you do.
Boonami
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