60PV450 bad YSUS?

[silicondt]

Hey all! I have a LG 60PV450 Plasma that stopped working.

When you turn it on it clicks a few times, the red light comes on. Then it goes off. No video during this. The YSUS is also making a buzzing noise.

I took the back off and tested a few things. If the YSUS is plugged into the power board, the voltages are not correct on VS-TP and VA-TP. BUT if I unplug the YSUS from the power board the voltages are good and stay on.

The fuse on the YSUS was out so I re soldered another fuse (same fuse part) on but it still buzzes and no video.

I also tried the test pattern by putting a paper clip in the 2 little holes on the control board and unplugging the blue ribbon cable. I got no test pattern.

If the YSUS is bad would you get no test pattern no matter what?

Also I tested the Y buffers for shorts and did not find any.

[sordids999]

Re: 60PV450 bad YSUS?

Posting pictures of the back of your tv showing the boards with clear pictures may help you more with fixing your problem

[ReeceyBurger123]

Re: 60PV450 bad YSUS?

Hi have you tried unplugging the top buffer and seeing it comes on with lower screen image ?

[tech2014]

Re: 60PV450 bad YSUS?

I had a similar tv with buzzing coming from the YSUS. It was a crack on the panel. If you get the voltages with YSUS removed, its most likely the YSUS, or possibly a buffer board.

[silicondt]

Re: 60PV450 bad YSUS?

I took out both Y buffers and same thing. When the YSUS is plugged into the power board the voltages are wrong on VS-TP and VA-TP and buzzing on the YSUS. When I unplug it the voltages on VS-TP and VA-TP are good but no video either way.