LG 50PX4R-ZB stuck in standby mode

[surferbum]

Re: LG 50PX4R-ZB stuck in standby mode

Problem is, the 42" and 50" use same boards; the only difference is software on the boards.

42" board no connector on top left and only 1 smd capacitor
http://flattvparts.co.uk/index.php?m...ducts_id=11562

50" board with connector and 4 smd capacitors
http://flattvparts.co.uk/index.php?m...ducts_id=11021

the one on my tv is the bottom one and this picture is defo the 50" one ... its gotta be hasnt it ??
http://shop.re-life.it/index.php?rou...roduct_id=1328

Thanks Tom

[tom66]

Re: LG 50PX4R-ZB stuck in standby mode

Problem is, the 42" and 50" use same boards; the only difference is software on the boards.

[surferbum]

Re: LG 50PX4R-ZB stuck in standby mode

That is possible; though the board should still work, you would just have about 1/3rd of the screen blank. In which case, you may need to order via model number 50PX4R-ZB.

Hi Tom

I have been really struggling to find the part i need but i just may of found one but it is from an italian ebay ??

Do you think this will be the one . It looks the same and numbers the same the only difference is on the white sticker.
My board says 5D6871VMAF68A003 and the one for sale he says 6871VMAD73A but everything else the same ?? I have asked him if it is for a 50" but he might not understand me !! I might have to get an italian phrase book !!

http://shop.re-life.it/index.php?rou...roduct_id=1328

I hope this is the one ??
Thanks

I think i have answered my own question ... the 42" main board doesnt have a connection on the top left and only 1 smd capacitor the 50" one has 4 SMD capacitors and the connection !!!!

I will try and get it delivered ??

please let this be the one ??

Thanks

[surferbum]

Re: LG 50PX4R-ZB stuck in standby mode

That is possible; though the board should still work, you would just have about 1/3rd of the screen blank. In which case, you may need to order via model number 50PX4R-ZB.

Hi Tom

OK i will try and find one. If there is anybody out there that has for sale a main av board for a LG 50PX4R-ZB then please get in touch

Thanks again tom for you info and help

[tom66]

Re: LG 50PX4R-ZB stuck in standby mode

That is possible; though the board should still work, you would just have about 1/3rd of the screen blank. In which case, you may need to order via model number 50PX4R-ZB.

[surferbum]

Re: LG 50PX4R-ZB stuck in standby mode

Sorry to be a pain but i just typed in the part number stated on the board
MF-056A 6870VM0531H (0) 050929 JHI

.....and i found this for sale BUT it syas it is from a 42" TV ?? Do you think when i bought this TV the prevoius owner tried to fix the fault but replaced the board with the wrong one ??

http://flattvparts.co.uk/index.php?m...ducts_id=11562

I just dont want to buy the wrong board..... thanks

[surferbum]

Re: LG 50PX4R-ZB stuck in standby mode

If that's the one the RL ON and VS ON connect to, then yes.

Hi Tom

Yes the RL ON and Vs ON go from the power board to the AV board with the video inputs on.

On this board there is a red led light on ? Does this red light on the av board indicate a fault ?

I have attached some pictures of the board. Do you know anywhere that i can get this board from ? I have tried ebay but there is only one for a 42" TV

Thanks again for all your help Tom !!

[tom66]

Re: LG 50PX4R-ZB stuck in standby mode

If that's the one the RL ON and VS ON connect to, then yes.

[surferbum]

Re: LG 50PX4R-ZB stuck in standby mode

No, you need to replace the board exactly... The main board is the one with the video inputs on it.

OK thanks Tom

So i need to replace this board but for a 50" ?

http://www.ebay.co.uk/itm/LG-42-Plas...item3f2284628d

thanks

[tom66]

Re: LG 50PX4R-ZB stuck in standby mode

No, you need to replace the board exactly... The main board is the one with the video inputs on it.

[surferbum]

Re: LG 50PX4R-ZB stuck in standby mode

Thanks for all your help Tom..... I will try find one as soon as i can. I was looking for one on ebay specific to the model number. It says Power Board ?

I found this :
http://www.ebay.co.uk/itm/6709V00001...item35c8bf1ca8

So can i get any type of board as long it is from a 50" LG Plasma ?

Thanks again for all your help

[tom66]

Re: LG 50PX4R-ZB stuck in standby mode

Main boards generally aren't repairable.

You can swap the main board, which usually works, just make sure you use 50 inch board as the 42 inch one will not work in a 50 inch set and vice versa.

Also, get a returns policy -- many dud boards and I may not be correct that it is a main board fault, but I am around 90% confident it is.

[surferbum]

Re: LG 50PX4R-ZB stuck in standby mode

Thanks Tom

Is this something I can fix or is it a replacement board ??

Is the model number on the the white sticker with the voltages on ? E247691

Thanks

[tom66]

Re: LG 50PX4R-ZB stuck in standby mode

It looks like you have a main board fault as it's never switching on the VS ON.

[surferbum]

Re: LG 50PX4R-ZB stuck in standby mode

That voltage is fine. >3VDC means voltage should be more than 3VDC.

Can you check RL ON and VS ON too?

Hi Tom

RL ON = 0.04V DC then switch power button on remote then 4.23V DC then back to 0.04 V DC after 10 seconds

Vs ON = 0.04V DC switch on power on remote still 0.04V DC

Thanks

[tom66]

Re: LG 50PX4R-ZB stuck in standby mode

That voltage is fine. >3VDC means voltage should be more than 3VDC.

Can you check RL ON and VS ON too?

[surferbum]

Re: LG 50PX4R-ZB stuck in standby mode

We can look at the cap later, for now let's rule in or out AC ON. Measure the AC ON voltage on your meter on the 20V DC range. Red probe on pin. Black probe on chassis. Turn set on. Voltage should stay at >3VDC. Does it?

Hi Tom

I checked voltage accross AC-ON and chassis and it measures 4.3V DC
When I turn the TV on for the first time it clicks and goes down to 4.29V DC
Then back to 4.3V DC

Is this voltage too much, it does not stay below 3v DC ?

Thanks

[surferbum]

Re: LG 50PX4R-ZB stuck in standby mode

Hi Tom
I will check the voltage when i get back from work.

Thanks

[tom66]

Re: LG 50PX4R-ZB stuck in standby mode

We can look at the cap later, for now let's rule in or out AC ON. Measure the AC ON voltage on your meter on the 20V DC range. Red probe on pin. Black probe on chassis. Turn set on. Voltage should stay at >3VDC. Does it?

[surferbum]

Re: LG 50PX4R-ZB stuck in standby mode

http://www.ebay.co.uk/itm/6870QCC113...item4173bc18eb