LG 42PW450T TV won't turn on

[stephenc]

I have a LG 42PW450T - ZA.BEKLLJP which suddenly would not switch on.

The remote red flashing light works fine indicating that there is power but the remote will not switch it on and the touch power button does not make any difference.

I've no idea where or what to check next and would really appreciate some help please.

[ReeceyBurger123]

Re: LG 42PW450T TV won't turn on

Good effort on researching, Imo just chuck the Tv out as you have not even helped us to help you one bit. Getting sick of this now expecting help but not making any effort.

Were not physics, do some research on how to test Plasma Tv voltages and what you should add to a thread will be a start.

[dick_barton]

Re: LG 42PW450T TV won't turn on

The manual can be downloaded from
http://www.electronica-pt.com/esquem...artdown/25865/

[stephenc]

Re: LG 42PW450T TV won't turn on

Good effort on researching, Imo just chuck the Tv out as you have not even helped us to help you one bit. Getting sick of this now expecting help but not making any effort.

Were not physics, do some research on how to test Plasma Tv voltages and what you should add to a thread will be a start.

Please do not add any more to this thread. You're the sort of idiot that puts newbies off asking questions on forums. Instead, you might like to go and throw abuse at others as I'm guessing you're the sort of person who does that frequently!

[stephenc]

Re: LG 42PW450T TV won't turn on

The manual can be downloaded from
http://www.electronica-pt.com/esquem...artdown/25865/

Thanks for help and apologies, I don't even know where to start.

[sordids999]

Re: LG 42PW450T TV won't turn on

Take pictures with the back off the Tv
showing all parts this may help you more

[ReeceyBurger123]

Re: LG 42PW450T TV won't turn on

I don't like to thorw abuse, just lazy half assed people fuck me off on here. Ive helped many who are willing to help us back.

[dick_barton]

Re: LG 42PW450T TV won't turn on

Thanks for help and apologies, I don't even know where to start.

OK. Do you have a multimeter and know how to use it. If you do then there are voltages written on a label on the back panel of the plasma screen saying what the corresponding voltages should be on the power supply board.

[stephenc]

Re: LG 42PW450T TV won't turn on

Take pictures with the back off the Tv
showing all parts this may help you more

I've removed the back of the TV and hopefully attached some images.

[stephenc]

Re: LG 42PW450T TV won't turn on

OK. Do you have a multimeter and know how to use it. If you do then there are voltages written on a label on the back panel of the plasma screen saying what the corresponding voltages should be on the power supply board.

Yes, I've a fair idea. I'll try to get hold off it tomorrow and take some readings.

[stephenc]

Re: LG 42PW450T TV won't turn on

OK. Do you have a multimeter and know how to use it. If you do then there are voltages written on a label on the back panel of the plasma screen saying what the corresponding voltages should be on the power supply board.

I'm afraid there were no voltages on a label on the back panel but I have taken some readings myself.

The attached images shows what I think is the main power board with markings 1 - 5 in red type and the readings with the negative probe earthed against the frame are -

1 There is 135V AC on either side of this fuse or resister (I don't know what it is)
2 There is 135V AC on either side of this fuse or resister (I don't know what it is)
3 There is 238V AC on either side of this fuse or resister (I don't know what it is)
4 There are 5 pins & they all read zero.
5 From the top pin to the bottom readings (DC) are 0.01, 0.03, 3.48, and the rest are zero

[dick_barton]

Re: LG 42PW450T TV won't turn on

Can you post a picture of the label. There are normally test points labelled on the power supply where you check these voltages.

[stephenc]

Re: LG 42PW450T TV won't turn on

Can you post a picture of the label. There are normally test points labelled on the power supply where you check these voltages.

Images attached thanks.

[dick_barton]

Re: LG 42PW450T TV won't turn on

What do Va and Vs measure on the power supply.

Does a relay click in when you attempt to power the set up?

The white connector has 18 pins on it which correspond to the legend alongside. Can you give the voltage readings on the 18 pins when you try to come out of standby which may give a clue as to what is wrong.

M_On =
Auto_GND
RL_ON =
AC_DET =
etc