Z50PJ240 Powers on then back off clicks but no picture

[tw2005]

Re: Z50PJ240 Powers on then back off clicks but no picture

PSU , not sure how core works but I assume it's like a deposit and you get that back when they receive yours?

Good luck.

http://www.encompassparts.com/item/9...s_Power_Supply

[tw2005]

Re: Z50PJ240 Powers on then back off clicks but no picture

yeah you don't wan't power or any residual power either in the caps.

I can't hang on 130 am here. It may not prove anything, have not unearthed anything yet with the other one so feeling like a goose now.

When the boards are cheap enough sometimes safer to get them all but for you maybe psu and if still needed hopefully encompass are good and reliable.


That link, looks like the PSU has an issue, i'm seeing none new and refurbs plus they want the bad one . $60 with your old one , all the other boars ysus,zsus and both buffers for another $100 if i've got it right.

here's the list, I put the same in the other post.

http://www.encompassparts.com/item/8...t_Pcb_Assembly

http://www.encompassparts.com/item/8...vtp_Board_Assy

http://www.encompassparts.com/item/8...1/Ydrvbt_Board

http://www.encompassparts.com/item/8...40301/Zsus_Pcb

Just over a $100 for all if I'm seeing right>

[soog35]

Re: Z50PJ240 Powers on then back off clicks but no picture

I can still test the resistance but need a little more directions on how to do it. Can I do it with no power like checking a resistor?

[tw2005]

Re: Z50PJ240 Powers on then back off clicks but no picture

throw some part numbers in here in case they're cheaper. Just found a ysus for $30 equivalent replacement not sure about their shipping.

http://www.encompassparts.com/item/8...t_Pcb_Assembly

[tw2005]

Re: Z50PJ240 Powers on then back off clicks but no picture

Ok well that probably makes the PSU suspect from the start, you've probably seen the LG 50PJ350 post today and his powers up solid with no sustains hooked.

as soon as he has the Ysus it quits, click on then off. He's checked the PSU and done the bench test with bulbs and it's staying good.

Sorry if I gave you the run around, I thought at some stage in the repair you had the PSU up.

can't belive what they want for each board though, ysus are $90 up

[soog35]

Re: Z50PJ240 Powers on then back off clicks but no picture

I see what your saying but I did unhook those from the very start and never got any power. So if they damaged the power board it would of been before I did the resister test.

Funny thing is when its all hooked up and I get lucky on a click and it will power on for a minute or 2 and everything looks normal before it will click off. Could take 50 tries to do that again. That's one reason I got lucky doing the resistor test once to check the voltage. Don't know why I never saw a test pattern.

[tw2005]

Re: Z50PJ240 Powers on then back off clicks but no picture

Wouldn't it stay powered up by unhooking those if those were bad?

What if it was working but the sustains were bad and damaged it because you forced the PSU on with that test with the resistors when the PSU test probably should have been done on it's own ?

That's something we won't know now.

It's all just theory. If the PSU is now totally dead, you'll need a PSU and the rest if it's bad as well you'll just have to work out if it comes to that.

Just looking at worst case what if you need PSU, YSUS, Zsus, buffer?

Sorry i wish i knew this model better but I simply don't and all i know is what i'd be looking at just in case.

The PSU may fix it, how can we prove the rest unless there's an obvious short or something I don't know.

I don't know what else to offer you, sorry

[soog35]

Re: Z50PJ240 Powers on then back off clicks but no picture

Wouldn't it stay powered up by unhooking those if those were bad?

[soog35]

Re: Z50PJ240 Powers on then back off clicks but no picture

Would I have to plug it up and be getting voltage to it to check that?

[tw2005]

Re: Z50PJ240 Powers on then back off clicks but no picture

well, I thought I read at some point the power stayed up and you had voltages to check?

Did this happen and did you take the opportunity to check if all voltages were present?

If the voltages were up, the control board was on and normal, jumpered for the test patterns but no image, I have to wonder.

I'd like to see if you can check out the sustains and buffers for any shorts. Check the resistance at the power connections on the Ysus and zsus. At least if you can post those up i can at grab mine and see if there is any wild differences.

It may be completely a waste of time and not the fault. I just think checking these out is not a bad idea because i can give you a good indication from my end of these boards I have which I know the TV powered up fully with both sustains firing.

[soog35]

Re: Z50PJ240 Powers on then back off clicks but no picture

So is still possible that it could be in the sustain boards or buffer boards?

[tw2005]

Re: Z50PJ240 Powers on then back off clicks but no picture

If you scroll down it says works with the following models. I have Z50PJ240UB
Do you think it will work?

I have no doubt it will work for this TV, but will this fix all your troubles? that i can't answer

[tw2005]

Re: Z50PJ240 Powers on then back off clicks but no picture

Same as mine, I can't remember but did it ever power up and stay on with both sustains isolated?

[soog35]

Re: Z50PJ240 Powers on then back off clicks but no picture

If you scroll down it says works with the following models. I have Z50PJ240UB
Do you think it will work?

[soog35]

Re: Z50PJ240 Powers on then back off clicks but no picture

http://www.ebay.com/itm/300999241883

[tw2005]

Re: Z50PJ240 Powers on then back off clicks but no picture

The part number comes up on SJ but just one version, yours with the 3 resistors. where are you getting the replacement from?

Mine has three boxes for model ID, LGIT PSPI-L912A AND IS RATED 100-240V AC INPUT, 50/60HZ, 5AMP 360W PDP MAX,17V 1A, 5.1V 3A, STDBY5V 1A, VS 197-207 1.6A, VA 60V 2A, 2010.6.14 REV 1.4

[soog35]

Re: Z50PJ240 Powers on then back off clicks but no picture

$83 to $140 most places are out of stock though. SJ is out of stock. Found one on ebay that has 2 resistors. it says it fits my model # but wanted to check with you guys to make sure.

[tw2005]

Re: Z50PJ240 Powers on then back off clicks but no picture

SJ site just crashed. what's a PSU going to cost?

[tw2005]

Re: Z50PJ240 Powers on then back off clicks but no picture

I think I'm just going to replace the board. Just need to confirm my answer in my no. 2 question. My board has 3 white resisters, can I replace it with one that has 2?

I'm going to say yes. Your PSU part number and mine are the same. Mine has 2 resistors. PCB # mine is rev 12 (/12) yours is #11(/11) but being the same PSU part # it's doing the same job.

I'll jump on SJ and see if they sub but it would be ok I expect.

[soog35]

Re: Z50PJ240 Powers on then back off clicks but no picture

I think I'm just going to replace the board. Just need to confirm my answer in my no. 2 question. My board has 3 white resisters, can I replace it with one that has 2?