Hy,
I want to fix Panasonic VIERA tx-l32c10p LCD TV. But I cant find out wich part is bad. I recorded the video of whats happening, but I will describe the problem anyway.
1. When I turn tv on it turns on normaly, except the right side of display is darker than left side (this is not visible on the video).
2. Tv then turns off by itself after few seconds.
3. Red light starts blinking and it doesnt stop at all, except if I press any button on the remote (than it turns off and just blink i press any button on the remote).
4. In order to turn TV back on I have to turn it off and on with master power swich.
IF I QUICKLY PUT TV TO AV MODE (So there is no picture, except the AV sign) TV WONT SHUT OFF AND EVEN IF I OPEN MENU AND IT STILL WONT SHUT OFF. However if i plug in my digital converter TV will shut off after few seconds of showing picture
The video:
https://www.youtube.com/watch?v=NQlGGQWFCl8
There is a picture of tv with back cover off in attachments.
I tried to disconnect every single component one at a time to see if anything changes but no luck:
-Because right side off the screen is darker and silent buzzing sound is coming out of two boxes on backlight circuit board (No.0) I tought that there is a problem with backlight or backlight circuit board (No.0).
I disconnected 2 cables for backlights (No.1), but there was no difrience except display was not lighted.
Than I disconnected whole backlight circuit board (No.2), but there was no difrience again.
There is a blue LED on the backlight circuit board (No.3), there is a video of its activity!
There is a picture of backlight board (No.0) in attachements!
https://www.youtube.com/watch?v=rb3j4iCbRGs
I also tried to connect No.1 left connector to socket for right connector and No.1 right connector to socket for left connector to see if display will be darker on left side instead on right side, but there was no change.
I measured resistance of backlight (No.1) connectors and they are the same: 0,5 OHM!
I also measured resictance of No.1 sockets and they are also the same: 0,3 OHM!
-I tried to disconnect display board, speakers, board with buttons (i jumped the connector to turn tv on), LED and IR sensor board, but there is also no difrience.
-I ofcourse also put tv to factory settings.
I CANT FIND ANY BAD CAPACITORS, BAD CONTACTS, NOTHING FRIED UP OR ANY DAMAGE ON THE BOARDS AT ALL!!!
There is SELF TEST info in the attachments -I found default resoults in service manual and confirmed that they are the same.
I think that PSU is bad, but im not sure. What do you think?
I want to fix Panasonic VIERA tx-l32c10p LCD TV. But I cant find out wich part is bad. I recorded the video of whats happening, but I will describe the problem anyway.
1. When I turn tv on it turns on normaly, except the right side of display is darker than left side (this is not visible on the video).
2. Tv then turns off by itself after few seconds.
3. Red light starts blinking and it doesnt stop at all, except if I press any button on the remote (than it turns off and just blink i press any button on the remote).
4. In order to turn TV back on I have to turn it off and on with master power swich.
IF I QUICKLY PUT TV TO AV MODE (So there is no picture, except the AV sign) TV WONT SHUT OFF AND EVEN IF I OPEN MENU AND IT STILL WONT SHUT OFF. However if i plug in my digital converter TV will shut off after few seconds of showing picture
The video:
https://www.youtube.com/watch?v=NQlGGQWFCl8
There is a picture of tv with back cover off in attachments.
I tried to disconnect every single component one at a time to see if anything changes but no luck:
-Because right side off the screen is darker and silent buzzing sound is coming out of two boxes on backlight circuit board (No.0) I tought that there is a problem with backlight or backlight circuit board (No.0).
I disconnected 2 cables for backlights (No.1), but there was no difrience except display was not lighted.
Than I disconnected whole backlight circuit board (No.2), but there was no difrience again.
There is a blue LED on the backlight circuit board (No.3), there is a video of its activity!
There is a picture of backlight board (No.0) in attachements!
https://www.youtube.com/watch?v=rb3j4iCbRGs
I also tried to connect No.1 left connector to socket for right connector and No.1 right connector to socket for left connector to see if display will be darker on left side instead on right side, but there was no change.
I measured resistance of backlight (No.1) connectors and they are the same: 0,5 OHM!
I also measured resictance of No.1 sockets and they are also the same: 0,3 OHM!
-I tried to disconnect display board, speakers, board with buttons (i jumped the connector to turn tv on), LED and IR sensor board, but there is also no difrience.
-I ofcourse also put tv to factory settings.
I CANT FIND ANY BAD CAPACITORS, BAD CONTACTS, NOTHING FRIED UP OR ANY DAMAGE ON THE BOARDS AT ALL!!!
There is SELF TEST info in the attachments -I found default resoults in service manual and confirmed that they are the same.
I think that PSU is bad, but im not sure. What do you think?
Attached Files
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