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TV Tech1
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Experience:  30 Years experience. Authorized Warranty servicer.
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my TV does not power on. I have to unplug and replug it from

Resolved Question:

my TV does not power on.
I have to unplug and replug it from the wall outlet and then it will power
on for only 10-20 seconds.
The same thing happens from different outlets and when unplug/repluging
from back of the tv.
Panasonic model #222TH42PX75U
Submitted: 6 years ago.
Category: TV
Expert:  TV Tech1 replied 6 years ago.

Ok, when you unplug it, and plug it back in, it turns on for 20 seconds.

 

Do you see the display panel light up, THEN it goes out and locks up on you?

 

Or do you see the panel stay black, THEN it goes out?

 

Once it goes out, do you see the led lamp "repeatedly blink" a certain number of blinks over and over? If so, count the blinks and let us know how many.

 

And do you have a voltmeter available to you? You may need one, so here is one you can get from Sears locally

 

http://www.sears.com/shc/s/p_10153_12605_03482344000P?vName=Tools&cName=ElectriciansTools&Lighting&sName=Multi-Meters%20&%20Meters&sid=IDx20070921x00003a&ci_src=14110944&ci_sku=03482344000P

 

 

Customer: replied 6 years ago.
I turned it off for 20 hours.
I was able to turn it back on and watch perfect television for about 45minutes
and then the same symtoms started again.
I let it rest for a couplas hours and I was able to watch perfect tv for 20 minutes and then the systoms start again.

After repeatly unpluging/plugging the cord,
The picture comes on and then the tv turns off and locks up.

The red lights flahes every 5 second for hours.
I will go and get voltmetr tomorrow
Expert:  TV Tech1 replied 6 years ago.

On a TH42PX75U --- If you unplug it and let it cool down, THEN it works fine for 45 minutes before it shuts down again your regulator is the most likely failure point.

 

I don't think you need to get that voltmeter to test that problem, so hold off on getting it.

 

I'll look up the Smps part number tonight and we'll get that installed...that's where your regulator is at.

 

However, do you see the picture do anything odd JUST BEFORE it shuts down, or does it shut down, then when you turn it back on, does it light up the display panel FIRST then turn off, or does it turn on Then turn off WITHOUT the panel lighting up

 

If the panel lights up, then shuts down, we may also have to replace the Ysus....it it turns on, then off, that points to only the smps.

 

 

Customer: replied 6 years ago.
1) Picture justs shuts down after 30-45 minutes
2) then the red lights blinks every 4 seconds forever
3) cool down period for at least 20-30 min
4) I replug and jiggle the plug in the wall outlet.
5) I power on.
6) I hear a clicking noise coming from the tv.
7) The red light is solid on.
8) The picture comes on perfectly
It sounds like the regulator is the problem
Can I buy one locally?
Can you help me install it?

Customer: replied 6 years ago.
1) Picture justs shuts down after 30-45 minutes
2) then the red lights blinks every 4 seconds forever
3) I do a cool down period for at least an hour
4) I replug and jiggle the plug in the wall outlet.
5) I power on.
6) I hear a clicking noise coming from the tv.
7) The red light is solid on.
8) The picture comes on perfectly
It sounds like the regulator is the problem
Can I buy one locally tomorrow?
Can you help me install it?

Expert:  TV Tech1 replied 6 years ago.

Actually, you can buy the Power board, or actually send it in for a rebuild.

 

Moduslink is good for that, and a pretty good price too...especially when some companies want $400 for a $100.00 board/repair

 

Part number is TXN/P1BJTUS

 

 

http://www.moduslinkptstvboards.com/TXNP1BJTUS-P13665.aspx

 

http://www.encompassparts.com/products/?EGRTXN/P1BJTUS

 

http://store.tv-repair-service-salinas.com/txn-p1bjtus.html

 

http://www.partstore.com/Part/Matsushita/Panasonic/TXNP1BJTUS/New.aspx

 

Other than that, you have 4 regulators, 16 output transistors , 4 photoisolators to replace on your board, because we do not know WHICH power section is actually causing the shutdown -- it's easier to let Moduslink do the hard work.

 

I'd give them a call....

 

Also, the sites I listed have a picture of the power board, you can easily trace the AC cord's jack directly over to the power board.

 

If you ship it to Moduslink -- those USPS postage boxes (one fee boxes) seem to be the best way to get it there.

 

Get some bubble wrap to pack it

 

If you have any questions, just ask

If you are finished, please press the ACCEPT button.

 

 

Thank you.

 

TV Tech1 and 4 other TV Specialists are ready to help you
Expert:  TV Tech1 replied 6 years ago.

Hey, did you get the INFORMATION I sent you, or did this question lock you out??