Sony KDL-52NX800 Issue

[misterfix]

Hi all,

I have an issue with my Sony KDL-52NX800.
It turns on every time and the sound is working, however 8 out of 10 times there is no picture.

When the picture works, it shows perfectly clear without any lines or spots. HDMI ports work. Side buttons also work fine.

I have attached photos of the TV and board in different angles.
Could it be an issue with the T-CON board or possibly a faulty panel?

Thank you for your time, appreciate your help

[nomoresonys]

Re: Sony KDL-52NX800 Issue

When it starts up with the fault, run a hairdryer over the powerboard a small section at a time, be sure to hit all the capacitors and the optos etc. see if it clears up or changes any.

[misterfix]

Re: Sony KDL-52NX800 Issue

When it starts up with the fault, run a hairdryer over the powerboard a small section at a time, be sure to hit all the capacitors and the optos etc. see if it clears up or changes any.

Thanks! I will give it a try and get back to you

[budm]

Re: Sony KDL-52NX800 Issue

Are there Voltage test points on the T-CON board? Looking at your pix #2, it looks like some of the LCD bias Voltages went away.

[Diah]

Re: Sony KDL-52NX800 Issue

regards to the TV set age and the fault showed by photo.. you have bad connection LVDS or Ribbon cable. LVDS are first style but ribbon are the most issue here.. be very very careful to plug them out as they are now in state of dry and easy broken or move to other side make short contact.. suggest in this case use always good loop, don't trust your eyes or the glasses you wear

[misterfix]

Re: Sony KDL-52NX800 Issue

Are there Voltage test points on the T-CON board? Looking at your pix #2, it looks like some of the LCD bias Voltages went away.

Sorry, which picture? I'm not too sure, could you possibly circle the area you think is faulty?

Would a new T-CON board fix this? Thanks again

[misterfix]

Re: Sony KDL-52NX800 Issue

regards to the TV set age and the fault showed by photo.. you have bad connection LVDS or Ribbon cable. LVDS are first style but ribbon are the most issue here.. be very very careful to plug them out as they are now in state of dry and easy broken or move to other side make short contact.. suggest in this case use always good loop, don't trust your eyes or the glasses you wear

Thanks for your response - would a new T-Con board fix this or does it need a power board?

Thanks

[budm]

Re: Sony KDL-52NX800 Issue

Sharp T-CON board.
Pix #3 & 4. Pix are not clear enough for me to read or see any labels on the board.

[misterfix]

Re: Sony KDL-52NX800 Issue

Apologies for the delayed response, I have attached close up photos of the Sharp T-CON board. Hope this helps!

[budwich]

Re: Sony KDL-52NX800 Issue

your first set of pictures... the second one appears to show one of the tcon to panel cables disconnected... right? Can you post other / similar pictures with some of the others disconnected (ie. one at a time and indicate which was disconnected)? This may help rule out a panel / edge board issue.

That second picture with the "white side" doesn't look very good as "usually" when a cable is disconnected, the side with the disconnect is a "nice clean white".

[misterfix]

Re: Sony KDL-52NX800 Issue

Just a quick update - I cleaned the T-CON to panel cables and the 4 cables on the top of the panel, then swapped around the cables and surprisingly the grey lines on the second picture have gone now but this time he brought back his friend...rainbow lol

I'm not too experienced with electricals but have a little knowledge, what could this mean regarding the cables?

[budwich]

Re: Sony KDL-52NX800 Issue

noooo.... its your eyes... :-) put on your best glasses and ensure that the cables have been put back / perfectly align. Again, do the test as suggested for both sides and indicate which cable was disconnected for the test / picture.

[misterfix]

Re: Sony KDL-52NX800 Issue

Cables are properly seated, will try to disconnect the cables as you have advised and report back the results

[misterfix]

Re: Sony KDL-52NX800 Issue

Issue has been fixed, seems one of the panel to T-CON cables was dirty and wasn't properly seated
Thank you all for your help!

[Relatives83]

Re: Sony KDL-52NX800 Issue

Issue has been fixed, seems one of the panel to T-CON cables was dirty and wasn't properly seated
Thank you all for your help!

So I'm having the exact same issue with my Sony KDL-52NX800 with the exact same issue with the picture as shown I've tried to reseat the ribbons and clean the tcon board but no changes. You mentioned cleaning and reseating the ribbons on the panel which actually fixed your issue was this a permanent fix and do you have any tips how to access the panel. I've taken off the back panel and removed the tcon board to clean but not sure how to get to the panel to access the ribbons there. Thanks in advance.

[nomoresonys]

Re: Sony KDL-52NX800 Issue

Try cleaning the lvds cable contact pins and same mainboard pins where it plugs in clean the other end too that goes to tcon or buffer board be careful they are delicate, some use iso alcohol and qtip, some use a pencil eraser. Make sure you position them just right when you plug them back in, it's pretty straight forward, can check youtube for some videos if not sure of procedure.

[Relatives83]

Re: Sony KDL-52NX800 Issue

Try cleaning the lvds cable contact pins and same mainboard pins where it plugs in clean the other end too that goes to tcon or buffer board be careful they are delicate, some use iso alcohol and qtip, some use a pencil eraser. Make sure you position them just right when you plug them back in, it's pretty straight forward, can check youtube for some videos if not sure of procedure.

So update on progress hopefully you can help. I ended up taking ribbon cables (4 of them) off of the t-con board and cleaning both the ribbons and the seats where they plug into the tcon board. I also took the tcon board off and cleaned with rubbing alcohol and still did not get a picture.
I ended up ordering a tcon board offline and installing the board. It fired up right away but the issue I'm finding is the tv will still turn on with the same half screen display after being on for a bit.
I can turn the tv on and watch until I turn it off after maybe 15-20 minutes and I can immediately turn it back on and it will give me the half screen display. I've discovered I can shut it off and back on a few times and get a picture to show back up like it is working again. But the results are the same if I watch it for any length and turn it off again.
It seems like either I recieved another bad board but I'm also concerned it's not the tcon and may be something else but that wouldn't explain why the replacement board got it to fire back up again.
I'm getting the half screen with sound but no display
I have not found a way to access the ribbons where they connect to the panel as they wrap inside the frame of the tv and feel it may be too intrusive and risky to mess with as I have limited skills and cannot find a tutorial online to access these cables.

[nomoresonys]

Re: Sony KDL-52NX800 Issue

Maybe try the tape cutoff method, been covered many times, put it in the search box above.