Re: LN40B550K1FXZA - block of colored lines
Well thanks for the input, I appreciate it. I guess I just have a decision to make.
jeremysaffir
Member
Last Activity: 06-24-2012, 09:54 AM
Joined: 05-19-2012
Location: Cary, NC
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Re: LN40B550K1FXZA - block of colored lines
Well, my first question is how much would I really get for the parts? (and how long would it take to sell all the parts?)
I bought this TV for cheap hoping to fix it cheap just so we could have a decent TV without buying a brand new one, so I prefer to fix it, if it's still worth it.
I would be OK with stripping it and just trying again, but unless you tell me the TV isn't worth enough with a new LCD panel, I'll just get the new LCD panel.
So my question is... in your opinion is it worth the...Leave a comment:
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Re: LN40B550K1FXZA - block of colored lines
I took the back off. Tried twisting the whole panel, pressing along the top, reseated and tried fussing with the connectors. No change, really. A small portion of the colored lines went kind of fuzzy or whatever, though I'm not really sure why -- seemed to be regardless of all my messing around.
So, seems likely to be a bad LCD.
Any other ideas or is it pretty certain to you guys too?
Just want to be sure before I shell out $160 on a new LCD panel. -- which, I'd like your opinion on, too. Is it worth spending...Leave a comment:
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Re: LN40B550K1FXZA - block of colored lines
What's a bad tab bonding problem mean? Probably not repairable, in any case....Leave a comment:
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Re: LN40B550K1FXZA - block of colored lines
Hmm. That Sony sure looks exactly the same. I tried twisting/flexing, but it's pretty tough to do without taking the back off the TV. In any case, no amount of tapping, pushing, squeezing, twisting or flexing (again, TV in one piece) has affected the issue one bit. Tomorrow's the weekend, I should have plenty of time to take the back off and mess around a little more.Leave a comment:
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LN40B550K1FXZA - block of colored lines
I bought the TV like this, pretty cheap. This is what the guy I bought it from has tried so far:
The T-Con Board has been replaced, as well as the main board, and the issue persists. He also replaced a bunch of capacitors on the power board, just as a shot in the dark.
I haven't tried much with it, yet, and I'd like to get a few ideas going before I tackle it.
From what I understand, it's highly likely that the LCD panel is bad. If so, no big deal, I'll buy a replacement and be done with it. However, I think the black block there indicates maybe it's not a display... -
Re: Repairing PSU FSP271-4F01
I'll have to get back to you on that. I was messing with it, and without going into details, I managed to blow the fuse again. Last one I had on hand, too, so I'll need to go out and buy more tomorrow, if I can find a place that's open.Last edited by jeremysaffir; 05-27-2012, 08:48 PM.Leave a comment:
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Re: Repairing PSU FSP271-4F01
Update for my TV:
My screwy picture was just a loose connection. I now have consistently good picture and sound (although, when the TV first turns on it does do something a little screwy but then it's fine)
However, there is still a high-pitched sound coming from, I believe, L2. It is the Yellow component near the fuse. I don't know what L2 is. Do any of you?
Also, if the TV is on long enough, L2 begins to give off a burning smell.Leave a comment:
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Re: Repairing PSU FSP271-4F01
I'm not sure what you're asking regarding the speakers. The speakers sound great, by themselves, as far as I can tell right now.
They sure didn't make this TV easy to service.
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The connector you see coming out of that bottom board makes its connection in the upper left quadrant of the board in the upper right.
here is a link to a very high res version of...Last edited by jeremysaffir; 05-24-2012, 08:06 PM.Leave a comment:
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Re: Repairing PSU FSP271-4F01
I would definitely complain about the sound coming from the main board. It is very piercing.Leave a comment:
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Re: Repairing PSU FSP271-4F01
PROGRESS!
I found a loose connection on a board I hadn't been messing with much.
When I turn on the TV, I get picture for about 1 second, then the whole screen goes blank for about one second. Then, picture comes on and stays on. I don't know if this is normal function of this TV or if this indicates a slight fault in a component.
In any case, I now have picture! And sound, too
However, I hear a constant, very loud buzzing sound from the main board.
And now, it seems...Leave a comment:
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Re: Repairing PSU FSP271-4F01
Good news and bad news. MOSFETs arrived. I popped them in and flipped the switch... I saw a bit of a spark coming from the grounding wire I THINK. Not 100% sure on that. The TV happened to be plugged into a GFCI and turning it on tripped the kill switch, so I had to press the reset button to get power back to my outlet again.
The good news... the fuse didn't blow! Not only that, but the red LEDs on the main board are lit up! Looks like we've fixed the primary power issue!
However, the bad news is the backlight doesn't come...Leave a comment:
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Re: Repairing PSU FSP271-4F01
I ordered both the BR and the MOSFETs, from different sites. BR arrived first, so I swapped it out. Fuse still blew. Guess we're waiting on those MOSFETs.Leave a comment:
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Re: Repairing PSU FSP271-4F01
Cool. I already ordered those plus the bridge rectifier. I'll replace all three and see what happens! Thanks...
Leave a comment:
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Re: Repairing PSU FSP271-4F01
I've got this same model TV with the same exact problem described. Replaced the fuse, and it immediately blew with some fury.
I tested the Diode Bridge Rectifier and it appears OK, but I am very much a beginner at this... if its not a cap or a fuse, I have a hard time figuring out what the problem is, until I gain some more experience and insight.
I am very curious to find out if anyone wants to help us continue to troubleshoot this, or if maybe even the original poster eventually figured out the problem and forgot to update...Leave a comment:
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