LG 60PV450 no picture, audio working details inside.

[drftoss]

Re: LG 60PV450 no picture, audio working details inside.

So by the sounds of it, you replaced the y sus and the main power and re-plugged in the ribbon cable?

[JohnGilday]

Re: LG 60PV450 no picture, audio working details inside.

Shinju,
Did I read somewhere that you had an LG Ysus board EBR73561201 ???

[chancleta]

Re: LG 60PV450 no picture, audio working details inside.

I have a 60LG450-UA with no picture and no Audio the only thing is the t-com Board is blinking led some time blink and some time don't can some one can tell me what can bad all the power are fine

[manusms1]

Re: LG 60PV450 no picture, audio working details inside.

Hi,
How to put the TV on pattern mode please?

Update

Got the replacement ysus installed, powered up the unit and got screen prime but no picture (yay one step closer).

So I decided to jump the test line and see if the controller board was working and low and behold screen lit up and colors were cycling as well as scrolling bar and other pattens no screen defects to be seen.

I started checking voltages VA/VS were spot on as well as VZB, I noticed that the VSCN and VY were pretty low -110/75. I pulled the meter off and sat back to think and the panel shut down after 5-6 min.

I turned it back to only to get no screen prime and or test patters. Now my VZB a voltage is 203v and my Ysus voltages are -130/110 (supposed to be (-185/150)).

I noticed the bottom most fuse on the ysus is open near the Vy pot, I don't know what happened or why it tanked.

My only assumption was that the Ysus board got damaged in shipping the seller didn't have any bubblewrap ran it was loosely sitting in a box, but when I put the meter on it it has really good resistance.

[retiredcaps]

Re: LG 60PV450 no picture, audio working details inside.

Here is the finished product of both LG 60PV450's mounted on the wall in my man cave!

I'll probably just go with a projector now that plasmas are no longer sold.

[Shinju]

Re: LG 60PV450 no picture, audio working details inside.

Heh why not!

Seriously though, I like to game and have buddies come over and bring their xbox/ps4 or whatever and play games.


Also like to watch sports and game at the same time too.

figured I had 2 of these and they match and I really didnt want to sell the one I fixed so I just kept it and thus LG wall was born.

[tom66]

Re: LG 60PV450 no picture, audio working details inside.

That looks like a pretty epic mancave, but I must ask... why do you need two 60" plasmas?

[Shinju]

Re: LG 60PV450 no picture, audio working details inside.

Here is the finished product of both LG 60PV450's mounted on the wall in my man cave!

One on the left is the one I made this thread about, the other is one I snagged on the cheap on CL about a year ago or more.

They are the same TV but have differences, the one on the right is newer and the UI is different, the one on the Left is the first run and the UI is also slightly different.

Only cosmedic difference is the right one has a silver pin stripe on the bottom of the bezel and the left one is blacked out.

This is a pretty impressive site in person, 120" of plasma on one wall!

Again thank you to everyone who had helped me get this sucker back up and breathing again!

[Shinju]

Re: LG 60PV450 no picture, audio working details inside.

And fixed.

So lessons learned with this one, the whole damn time the ribbon cable from the control board to the mainbord was cockeyed on the mainboard side (I never touched this) and was causing the screen to not fully come on with a non test pattern picture.


I Fitted the ribbon perfectly and hot damn this son of bitch works great.

I would also like to add that I am using revision 2 boards from Panel Sticker Number PDP60R30110 mine is PDP60R30000 and they are compatible.

I using ysus, upper and lower y drives and xboard from the PDP60R30110.


Gonna let it soak for a bit after I put it back together.


/whipes brow, glad this is done for now.

[Shinju]

Re: LG 60PV450 no picture, audio working details inside.

One other update for tonight. So I replaced the new y sustain that was bad with the old one and put it back in the TV hooked up the buffers and everything and the screen turns on there's prime and I can run the test patterns everything looks great so I'm back to square one with screen prime no picture (audio).


Also, VSC and VY are still very low.

[Shinju]

Re: LG 60PV450 no picture, audio working details inside.

Update

Got the replacement ysus installed, powered up the unit and got screen prime but no picture (yay one step closer).

So I decided to jump the test line and see if the controller board was working and low and behold screen lit up and colors were cycling as well as scrolling bar and other pattens no screen defects to be seen.

I started checking voltages VA/VS were spot on as well as VZB, I noticed that the VSCN and VY were pretty low -110/75. I pulled the meter off and sat back to think and the panel shut down after 5-6 min.

I turned it back to only to get no screen prime and or test patters. Now my VZB a voltage is 203v and my Ysus voltages are -130/110 (supposed to be (-185/150)).

I noticed the bottom most fuse on the ysus is open near the Vy pot, I don't know what happened or why it tanked.

My only assumption was that the Ysus board got damaged in shipping the seller didn't have any bubblewrap ran it was loosely sitting in a box, but when I put the meter on it it has really good resistance.

[Shinju]

Re: LG 60PV450 no picture, audio working details inside.

Samsung PS50A558S1FXRU Full Training and Service Manual part 3 (Final)

[Shinju]

Re: LG 60PV450 no picture, audio working details inside.

Samsung PS50A558S1FXRU Full Training and Service Manual part 2

[Shinju]

Re: LG 60PV450 no picture, audio working details inside.

Samsung PS50A558S1FXRU Full Training and Service Manual part 1

[Shinju]

Re: LG 60PV450 no picture, audio working details inside.

z60pv220 service manual

[Shinju]

Re: LG 60PV450 no picture, audio working details inside.

Try this, let me know if this works.

Also I am uploading a Samsung PDP SM I don't think you have either.

[Shinju]

Re: LG 60PV450 no picture, audio working details inside.

I do and I will pm you here shortly.

[tom66]

Re: LG 60PV450 no picture, audio working details inside.

Thanks send me a pm and I can upload it.. Do you still have that scope?

[Shinju]

Re: LG 60PV450 no picture, audio working details inside.

Tom66

I bought a service manual for this unit, it appears to be a flow chart/repair schematic for mainboard functions.

If you want to add it to your database I can send it to you.

[Shinju]

Re: LG 60PV450 no picture, audio working details inside.

Ok, being that I am flying blind here with no service manual I am now just going to use this thread to document my finds and outcomes.


So with the 60" PVXXX series you must have the Ysus and xmain hooked up (no buffers and no flat ribbon cable connected to the lower buffer) to the control board and SMPS to get VZB reading off the Xmain, you will not get any VZB voltage without the y/x sending 18v back and forth to the controller board.

I don't know of any other method to test the xmain board solo.

So my xmain is reading 105.74 VZB (zbias) panel is 110 spec.