Question about Panasonic Televison & Video

2 Answers

Panasonic 42" Plasma Model #: th42pz80u won't turn on. No indicator light illuminates. While TV is plugged in, it continually cycles on/off. Picture does not come up. TV is 4 years old.

Posted by on

  • 3 more comments 
  • firefly727
    firefly727 Nov 03, 2012

    Could it be a capacitor problem on the power supply board?

  • SD Tech
    SD Tech Nov 05, 2012

    Yes or a bad power board itself.

  • SD Tech
    SD Tech Nov 05, 2012

    I cannot be to brief here--a replacement board will work but the issue usually is the caps ussed are too low a working voltage--they are in the standby part of the power supply--running 7/24 if unit is plugged to power--I had one set where I replaced 7 caps (fixed the set) but went up on the rated working voltage marked on them--an issue then is space--you may have some problem fitting the bigger caps in the board---7 caps of assorted values cost me about 14 dollars with shipping. A new board will have the lower cheaper caps that will sooner or later suffer the same fate.

  • firefly727
    firefly727 Nov 06, 2012

    Well, I thought I saw about 6 or 7 domed capacitors, so I ended up taking the whole ps board into a tv repair guy. He said the caps were fine, but discovered the on/off chips(?) were shorting out. He added a capacitor to them, and said 90% of the time that fixes the problem. It didn't. It must be somewhere else in the system, so I am just going to let him look at the whole tv tomorrow. I'll post what he deems the problem, solution and whether or not if it works. Thanks again for the help.

  • firefly727
    firefly727 Dec 11, 2012

    Unfortunately, I can't even get the tv to turn on. So, therefore no line is visible. I recently found out that my particular model was discontinued in June 2012. The problem is definitely in the Power Supply board, Panasonic doesn't have any PS Boards to sell anymore, so looks like I'm out of luck. Bummer.

×

2 Answers

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    Top Expert:

    An expert who has finished #1 on the weekly Top 10 Fixya Experts Leaderboard.

    Superstar:

    An expert that got 20 achievements.

    All-Star:

    An expert that got 10 achievements.

  • Panasonic Master
  • 14,553 Answers

Its possible with that age---see photos to know what to look for:



Panasonic 4211_4_2012_3_26_57_pm.jpg

Posted on Nov 04, 2012

  • firefly727
    firefly727 Nov 05, 2012

    Thanks. I'll check the boards out tomorrow.

  • firefly727
    firefly727 Nov 05, 2012

    I checked the capacitors for bulging/doming as you suggested. I found 6 that showed some dome shape to them. They happen to be the largest ones on the board. Is it worth just getting a new board rather than replacing the capacitors? It is the first board that the power goes into from the plug, and also where the clicking noise is coming from.

×

  • Level 1:

    An expert who has achieved level 1.

  • Contributor
  • 1 Answer

I have a Plasma Tv 42 inch and it has a white line across the top of the screen and still see the tv as normal

Posted on Dec 09, 2012

5 Suggested Answers

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi,
a 6ya expert can help you resolve that issue over the phone in a minute or two.
best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
goodluck!

Posted on Jan 02, 2017

  • 1 Answer

SOURCE: Philips 42" Flat Screen Plasma - blinking red light 7 times - HELP please!

6f4eeb8.jpg
Here is a photo of the board where I have removed the two from my TV. You can see the two open holes.

Posted on Dec 12, 2009

Fujitsu
  • 29 Answers

SOURCE: Hitachi Plasma TV model P50H401

I think you have problems with the digital main PWB.

If the power PWB failed, turn off and change the pilot ligth to red.

Posted on Nov 28, 2008

  • 9 Answers

SOURCE: Plasma TV Picture Periodically Blurry/Color is Distorted

This sound more like a cable issue. Also check the leads going from your cable box to the set/ If you are using component cables one of them may be loose.

Posted on Apr 29, 2010

  • 1 Answer

SOURCE: Problem with Hitachi P50H401 Plasma TV - Will not

I have the same model, P50H401 and it developed the same problem two days ago. This set is 2 1/2 years old in service, being purchased in December 2007. The original manufacture date was October 2007.

The set was turned on and operating at the time and then promptly shut down by itself. The front blue LED power indicator began flashing four times in a loop or cycle.

The flashing LED sequence in this instance points to a problem with one of the following boards: PSU, X-Sus, Y-Sus or SDRs (there are two SDR boards, SDR-U and SDR-D, both are connected off of the Y-Sus board on the left hand side of the frame when rear facing). The set shuts down to prevent further damage to other boards or components.

I could power cycle the set but it would shut down after after a few seconds. Power LED would stay solid, I could hear the PS relays switching, and audio would output through the speakers. Then as the screen was just about to illuminate, the entire set would just shutdown. The blue LED would again go into the 4X flashing sequence.

I could not visually detect any signs of severe component damage on the main PS board. The two large electrolytic capacitors which have been mentioned as problematic in other threads seems fine. The where slightly raised on the top surface, but not blistered or completely blown open.

The only indication of component damage that I could detect visually was on one of the small surface mounted ICs on the SDR-U board.

Through reading other posts on this site, I learned that I was able to remove the suspect SDR-U board and then re-power the set. Doing this proved that the PS, X and Y Sus, and the SDR-D boards where o.k. The PS held, and the lower half of the screen illuminated. (I would only do this for as brief a period as required to determine if the the other boards would function and the screen would illuminate. Do not pro-long operation in this state so as to not cause further damage.)

It was somewhat difficult to locate the correct SDR-U board. My local service rep did not have one in stock, and the Canadian parts distributor was also out of stock. They estimated 10 - 14 business days to order one up from the U.S.A. (Hitachi closed their consumer electronics division in Canada back in 2009.)

By chance, I checked with another service rep in an adjacent town. He had a board for the P55. We did a visual comparison on the two boards and determined that it would be compatable.

The easy part was removing the defective SDR-U board and installing the replacement. The hard part was re-alinging the three ribbon tabs into the respective connectors on the SDR board. Be careful with these ribbons. The other end of each is fused to the plasma panel screen, so if you damage them, your screen is rendered useless.

I initially had the same problems as others have posted with having black or gray lines on the screen when the SDR-U was replaced. After gently adjusting the position of the ribbons as they are seated in the connectors, the lines disappeared. This was a slow and frustrating procedure, but it worked, Be patient.






Posted on Jul 03, 2010

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

1 Answer

Panasonic TC-P42S30 power light on but black screen


It is likely that there is a power supply problem

Mar 01, 2013 | Panasonic 42 TCP42S30 42 Plasma TV

1 Answer

Why won't my Panasonic 42 TCP42S30 42 Plasma TV turn on.


Switch off TV, switch off power, remove plug and wait for 48 hours and retry.
If problem persists, I suggest it is better to refer it to a qualified service
technician, since the back cover has to be opened for investigation/rectification.

Aug 22, 2012 | Panasonic 42 TCP42S30 42 Plasma TV

1 Answer

PANASONIC PLASMA HD 42 INCH WONT TURN ON JUST BLINKS 10 TIMES


10 blinks of standby light with Panasonic Plasma indicates:
10 blinks Sub 5v SOS / Main 3v SOS DG Board
DTV 9v SOS / Tuner Power SOS


For more details visit the site named [Electro-help" The keyword to search is "Electronicshelponline"

Jul 03, 2012 | Panasonic TCP42C2 42 in TV

1 Answer

Won't turn on, light flashed 9 times


the 9 blinks is indicating a panel SOS which means the Panel itself is whats causing the 9 blink error code.

Mar 24, 2012 | Panasonic Viera TH-42PZ85U 42 in. Plasma...

1 Answer

I accidentally overheated my Panasonic Plasma TV TH-42PZ700U. It won't turn on, and the power button is just blinking. What can I do?


All you can do is: Take the plug out of the wall (power) - wait 2hrs, plug in and try again. If it will not work after being cooled and the capacitors drained (which this will do) then it needs repair.

Mar 20, 2012 | Panasonic TH-42PZ700U 42 in. Plasma...

1 Answer

Not turning on led blinks twice


If your model is the TH42PZ80U 2 blinks is indicating to replace the D Board (Logic) That model used two different versions D board. www.tvcircuitboards.com has both versions and can assist with determining which version your model uses.

Feb 18, 2012 | Panasonic Viera TH-42PZ80U Plasma TV

1 Answer

42 " panosonic plasma model th-42px6ou keeps


There is an energy save setting on your controls. Turn that off if you don't want tv to keep turning off while you are changing inputs. Hope this helps.

Oct 16, 2011 | Panasonic TH-42PD50U 42 in. Plasma EDTV

Not finding what you are looking for?
Televison & Video Logo

Related Topics:

1,127 people viewed this question

Ask a Question

Usually answered in minutes!

Top Panasonic Televison & Video Experts

 Grubhead
Grubhead

Level 3 Expert

5017 Answers

The Knight
The Knight

Level 3 Expert

73691 Answers

Jaime Hernandez

Level 3 Expert

2315 Answers

Are you a Panasonic Televison and Video Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...