Toshiba 42HP66 Screen Blew

Also noticed that there are 4 Ceramic resistors which were squealing in the power supply area after replacing the fuse were super hot and actually melted the solder and became loose and fell out. (Burnt finger touching 2 of them, trying to locate source of squealing)

Possibly cold solder joints or excessive drain?


Any ideas would be greatly appreciated

Thank you

Jon
United Electronics

I am not a very experienced technician

Only have basic knowledge but, willing to learn I am Autistic and, everybody thinks I am just stupid. I wanna prov them wrong

I probably would not need to be here IF I was a Real Good technician

I am not shy to ask some questions to learn

Thank you

Johnny

Hello Gentlemen ,

I am trying to find some tips for a LG 42LF11-UA LCD television with NO video

But, I cannot find anywhere on this site that deals with LG

Can anyone point me in the right direction

I have a funny feeling that I might just need a TConn controller but, there could be another problem

Thanks

Johnny
United Electronics

We are happy to help you learn.

Please keep threads on topic and post new problems with different models in a new thread in the appropriate forum. It is unlikely that anyone with knowledge of an LG product will be looking in a thread about a Toshiba.

The reason I asked if you were a tech is that I saw your signature and wondered. An experienced tech would not just replace a fuse like this without doing some checking, and would know that a squeal is likely a switching power supply being heavily loaded down. Fuses don't blow for no reason, particularly those that are AFTER a regulated supply and have high current ratings. If the power supply is running correctly, there is almost certainly a problem on the Y or buffer boards, perhaps other or panel. A blown fuse is a good indicator of where the problem is, and one should start looking for a short that is capable of drawing a large amount of current BEFORE replacing the fuse. You run the risk of doing more damage by running the set, particularly running it to the point that the solder on the fuse melts.

I can not find any LG thread. I apologize

I actually found out what was wrong. It was the YSUS and, I had another different set which used the SAME YSUS and, changed it and the set powered up. Now, I need to determine what could be wrong with the original YSUS.

Also, I just wanted to share this . There are 2 fuses on the YSUS and, I actually forgot to replace the fuses in it when I borrowed them for the other set and, when I powered the set on IT actually powered up and worked without them. I only noticed when I was removing it to compare the 2 that they were not there. Weird ??? And, when I replaced them the set still worked except with more color. So, I am wondering exactly what the function of those fuses are? They are surely not for power because the set worked or, powered on with graphics at least, without them

And, No, the solder melted on the 3 Ceramic resistors not, the fuse.

Also, in this set the YSUS is bad but, the buffers are good. kind of backwards huh?

Please advise

Thanks

Johnny