LG 60pv250 no picture with sound

[mirancer]

Hello everyone,

I have a LG 60pv250 tv with no picture but has audio. I have searched the other posts regarding the same tv and followed the basic troubleshooting steps posted for the same model tv, but the answers tend to go in a different direction. I have looked for cracked solder joints, bad fuses, bulging capacitors, reseated the connectors, the voltages that are on the labels seem to be in spec but still not getting a picture or any further on finding out which board could be bad. Could someone lend me a hand in getting some kind of definitive answer? I would like to get this tv back up and running for my friends kids. They would really appreciate it.

Thanks

[Hamie]

Re: LG 60pv250 no picture with sound

Have you tried test patterns?

If not upload a picture of the control board.

[mirancer]

Re: LG 60pv250 no picture with sound

Hi Hamie,

I was hoping to get a response from you. From reading the other posts regarding this particular model, you know what you're talking about. I have tried the test pattern using this post https://www.badcaps.net/forum/showthread.php?t=50371 with no results. Screen remains dark and no pattern.

[Hamie]

Re: LG 60pv250 no picture with sound

So I noticed you are saying all voltages are in spec.

Just to clarify you have checked ALL the critical voltages.
VS VA VSC -VY Z-BIAS



They must all match the sticker.

[mirancer]

Re: LG 60pv250 no picture with sound

Here's the label the test points and the voltages i measured.



Vs TP


Vs Voltage


Va TP


Va Voltage


VSC TP


VSC Voltage


VY TP


VY Voltage


VZB TP


VZB Voltage


Somehow in my initial voltage testing I either forgot the VZB voltage reading, didn't measure it, or couldn't find it. Those voltage readings are with the tv plugged in and turned on. Well at least I think it was. The VZB voltage is lower then what it says on the label.

[Hamie]

Re: LG 60pv250 no picture with sound

http://m.ebay.co.uk/itm/191568197879?_mwBanner=1

[Hamie]

Re: LG 60pv250 no picture with sound

Most of the parts in that kit will be surface mount.

How's your soldering skills?

[mirancer]

Re: LG 60pv250 no picture with sound

Soldering skills are excellent. I can solder 0402 smt resistors. Thanks for your help with this. I will purchase the kit and update you you on the outcome.

[mirancer]

Re: LG 60pv250 no picture with sound

Hamie,

I have received and replaced all the parts in the kit that you suggested that I buy. I am still reading a low VZB voltage. When I initially plugged it in, I looked at the display for any type of glow or OSD. I saw nothing. Then i probed VZB and got a reading of 70 volts and dropping. Turning off the tv and turning it on again i rechecked all the other voltages. Everything was in spec still. Remeasured VZB and noticed the voltage was down to 30 volts. Turning the tv off and on while measuring VZB, voltage would go up about 3-5 volts then start dropping back down. What would be the next step? Thanks

[mirancer]

Re: LG 60pv250 no picture with sound

Bumping message.

[mirancer]

Re: LG 60pv250 no picture with sound

One last bump for this post. I've replaced what I was told to and still nothing. Someone? Anyone?

[jwarnes]

Re: LG 60pv250 no picture with sound

I feel your pain. Mine is doing the same.