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31
LCD TV forum / smart tv
« Last post by jose almeida tavares on December 01, 2021,13:54:20  »
Hello, i have one tv smart main board ref. TP.SK518D.PB802 and no tuning the dtv. Apears dtv menu for sinto. thanks.
32
LCD TV forum / Re: LG TV: image = No. sound = Yes
« Last post by downunder on November 29, 2021,18:40:45  »

Those are the boards. The circled part is just a piece of fancy foam to prevent the board touching the metal strip. There are quite a few capacitors on each board, each soldered to the board at both ends. .These are the cap. terminals across which you need to measure. The gold spots are likely test points but I have no idea what they're used for. I see you have a digital meter so use ohms or the beep function. A reading below 100 ohms is suspect. If you find any, reverse the meter probes and recheck. It may read OK the other way. You'll likely find a matching cap on the other boards so you may compare reading. A totally shorted one would be a bonus as it will probably be your offender.
33
LCD TV forum / Re: LG TV: image = No. sound = Yes
« Last post by Snuf3 on November 28, 2021,11:36:34  »
Hi Bruce
first of all - have a nice weekend.
I took off the speakers so I can have access to the long boards. 1 picture == 1000 words so...
Pic No 1. I just verify that we are on the same page and this is the part.
Pic 2. The black arrow is what I understood to be a capacitor (tiny chip with cxxx). 
the part I circled with purple color is something I checked for the "bip" test (it was ok)
the red arrow. should I check that? I see that at the end of each one there is a gold circle (is it for test?).
Pic 3. This is were I am puzzled  . I don't know what setting I should have in the multimeter (what to check?)  and if my checking method is correct (one side on the capacitor the other side on a metal board) and most important of all - what values to expect? how  to know if I am in the correct range...
Hope I was clear. If not - tell me and I will clear things if I can.
Thnx Bruce
34
LCD TV forum / SANYO LCE46FM08-C/XE FIRMWARE
« Last post by jose almeida tavares on November 25, 2021,12:56:47  »
Hello, i need the firmware or memory dump data for this tv. The panel is model LTA460HJ14. Thanks.
35
LCD TV forum / Re: panasonic tx-L42D25B
« Last post by downunder on November 25, 2021,02:40:03  »

Well who would've thunk it - thanks for the feedback, Shaun.

Bruce
36
LCD TV forum / Re: panasonic tx-L42D25B
« Last post by t1412 on November 24, 2021,13:06:46  »
massive thanks for the tech tip the backlight is the fault,

shaun
 
37
LCD TV forum / Re: panasonic tx-L42D25B
« Last post by t1412 on November 24, 2021,09:23:28  »
Hi vince/brucie the screen does flash up for a second then off, starts flashing 7 error blink code thanks 

shaun
 
38
LCD TV forum / Re: panasonic tx-L42D25B
« Last post by downunder on November 24, 2021,03:04:22  »

Very interesting, fix2003. A check of the service manual says that code 7 ia a Sub_3.3V_Sense_SOS, which would generally mean the Main (A Board). Granted the error codes are not always gospel but it would be easy enough for a person of Shaun's ability to test your solution.
Go Shaun the sheep - I'd be interested to know your findings.                  Bruce
39
LCD TV forum / Re: LG TV: image = No. sound = Yes
« Last post by downunder on November 24, 2021,02:52:36  »

OK, so where you've written "end point", after you remove the speakers and the wi-fi module, you'll find usually 2 metal strips. Remove these as well and underneath you'll find 2 thin long circuit boards attached to the display panel (= panel). This also is the entry point for the 2 large flexies which are removable here if necessary.

These 2 long boards feed data into the display panel and it's on these that you'll find the capacitors, not the type you've pictured but tiny chips (chips) which are surface mounted and designated C---. Usually quite a few on each board. While you are there, make sure no liquid has found its way down the screen front and caused corrosion at the many flexies that are bonded into the panel base. This is bad news for a display panel and can also cause "no image". See how you go with that.
40
LCD TV forum / Re: panasonic tx-L42D25B
« Last post by fix2003 on November 24, 2021,02:37:39  »
note found on web
Panasonic TXL42D25 Error 7
This one was not to difficult to diagnose but i thought i would share the info as it was interesting.

This LED back light TV would attempt to switch on with a brief flash of back light then the TV would shut down and give error code 7

the manual states error 7 is A or XW Board

My first thoughts were power supply but i removed the outputs to the LED's and the set ran with no back light sound etc
was fine.

as this was under warranty i did not investigate the panel any further but i assume one of the LED sections were O/C

This is my first LED back light failure and is one to look out for.

Anyone else had this kind of problem?
replacement screen cured the fault.
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