#1
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Upstar Model P250WT 19" LCD TV has no picture
Hello everyone, a few years back I had bought at a local computer store a 19" Upstar (cheap Chinese made unit) LCD HDTV for $120 and it worked pretty well for a while but then it decided to take a dump on me by not showing a picture anymore It will show its splash screen just fine but then after that it refuses to show the screen for the tuner or the video input sources, at first I thought it was a bad power supply (it uses one of those 12v 5A power supply bricks) so I had ordered a new one from parts express, but when I got the new power supply and hooked it up to the TV it still wouldn't show a picture.
Any ideas as to what might of happend to my TV, and what I could do to fix it? Or is it that I just need to toss it? |
#2
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You sure that's a 19" TV? If so, you have got the model number wrong. The P250WT is a 25-inch set.
http://static.highspeedbackbone.net/...V%20Manual.pdf . |
#3
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It could also be that the size was misrepresented on the box (leave it to the Chinese to falsely label something for export to the American Market which is very common as well.) Anyways I looked on the website for the company and they no longer have support for that model because they've already moved onto LED Sets and so I was unable to look up the model and or figure out what the issue was with it, I was hoping someone on here might have had a similar experience with another similar TV if not the same model and could tell me what could be causing this TV's issues and whether or not it could be easily repaired. |
#4
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Well if it shows a spash screen then the panel must be working, unless the back lights crap out shortly after booting up.
I assume you've tried all the different inputs? My only contribution would be to tell you to take the back off and look for bulged electrolytic capacitors, beyond that someone else will have to chime in. |
#5
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Shine a flashlight at a low angle across the screen while it's running. If the picture is there, you can see it. That tells you that the CCFLs are bad, and you need to pull them, measure them, and order a pair. Get several more than you need - you will break one, for sure. I've replaced CCFL on about 8 sets, and had only one go easy from start to finish. eBay is full of the CCFL lamps - search "backlight lcd tv" for replacements. They are measured in mm length. Also, if you are going to troubleshoot LCD sets, this tester comes in handy: http://www.ebay.com/itm/1pc-12V-CCFL...-/170906315632 I have the HR Diemen TL1040 (mine was 90 bucks, but was the original back in 2004, before the Chinese made them), and it is a great go-no go tester for CCFL backlights for LCD TVs, monitors, and laptop screens. Cheers,
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Brian USN RET (Avionics / Cal) CET- Consumer Repair and Avionics ('88) "Capacitor Cosmetologist since '79" When fuses go to work, they quit! |
Audiokarma |
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