Question about Panasonic PT-47WX42 47" Rear Projection Television

2 Answers

Turn the power on and i get no picture then a few seconds later it shuts off and the power light blinks 3 times

Posted by on

2 Answers

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

    President:

    An expert whose answer got voted for 500 times.

  • Master
  • 788 Answers

Your symptom sounds like a damaged convergence IC.

This is a common failure for this particular television. The blinking lights indicate a short in the power supply

There are two and large IC’s that control the convergence in a big screen set. Some of the newer sets only have one. They are secured to a very large aluminum heat sink. They will have a part number stamped on them that will start with an STKXXX-XXX, like STK392-110, and they are located on the signal board (on the left as you look into the back of the set).

Along with the convergence IC’s there will also be some associated components that will need to be replaced as well. There are some resistors that are part of the convergence circuit that will be open and need to be replaced. Most likely these will appear charred in the center. If you have an Ohm Meter or a DVM, check all the resistors that are close to the IC’s and you should be looking for either ones that have opened or have changed values.
There are also two resistors on the front of the board located in the middle that are fusible link resistors, these should be checked for opens and replaced if they are found so.

I would suggest that you contact a service center in your area for a complete diagnosis and repair, as this type of repair can get a little tricky. But if you want to repair the set yourself, just remember to be careful. The capacitors and CRT’s can hold a charge and may shock you.


If one of the convergence IC’s are found to be bad, I would replace them both, if one has gone bad the other may go soon. I usually order my parts from Andrews Electronics in California, they will have the OEM components that you will need.
Their site is http://www.andrewselectronics.com/welcome.aspx
And their phone number is a 24-Hour Order Desk: (800) 274-4666
I recommend the phone order so you can talk to the person about the different types of IC’s that are available.

I would also advise that the convergence IC’s be OEM or better, just because they are cheap does not mean that they are a good deal. I have seen the cheap IC’s fail after a short time, even though they look exactly like the OEM IC’s. I think that the bottom line is that you will get what you pay for when it comes to the parts.

You can also try http://www.tvrepairkits.com/ , I have not tried them yet, but they do carry OEM or better parts.

I hope this information allows you to resolve this issue.
If you need further assistance please comment to this post and I will try to help you further.
asnowman

Posted on Oct 02, 2009

  • 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

Three blinks is short protection---usually in this set it means one of the two STK-392-110 convergence chips is shorted.

If you unplug the set and look inside--you will find 2 metal heat sinks that have the chips attached to them; the chips are black and 2 1/2 inches wide X 1 1/2 inches tall and have the full STK number printed on them in white-----

Look at all the blue resistors around in front of them--most are marked 2.2 ohm----if any are discolored or white in the middle you have found your problem.

Both chips and any bad resistors need to be replaced and the set adjusted---you can buy both chips on Ebay for about 12 dollars plus shipping--If you find the bad resistors= 99% chance that one or both chips are bad.

I can provide you with detailed instructions for this repair if you are able to do it---most TV shops will charge 300-400 for this type of repair. I have done hundreds of these sets and charge 200-250 for this repair.

If you get someone to do it--shop around--if they say it has to "go to the shop" keep looking as any good tech can do this repair in your home in about 1 hour.
Also make sure whoever does it changes BOTH of the chips!

I do not know if you have the ability to do this repair--it is a fairly easy set to fix for this problem--what I do when I see this is gain access to the two chips and unsolder both of them--if the set turns on then--one of them is bad.

I am not permitted here to ASK for your email address or give mine......I am here to help people and contact me here if you need help or advice...

Regards, SD TECH

Posted on Oct 02, 2009

3 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

Kimi
  • 277 Answers

SOURCE: Comes on for about 3 seconds and then shuts off!

My Panasonic PT has developed the same problem: The repair folk came and replaced the "entire" electronics section! The guy said it was $1500 just for the section. He had no idea what caused the problem---just that Panasonic told him to replace the entire unit. I'm delighted it was still under warranty!

Posted on Sep 11, 2005

  • 326 Answers

SOURCE: Power problem

Three blinks - B+ over voltage protection (OVP), unit goes to the standby mode then displays the 3 blink fault. This is also a problem in the power supply circuit, check T603 and R672.

Posted on Jan 31, 2009

Add Your Answer

Uploading: 0%

my-video-file.mp4

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

×

Loading...
Loading...

Related Questions:

1 Answer

Mitsubishi Projection TV shuts off


A model number would help but many have a self check; when turn set on and power light (green?) comes on and a few seconds later off on the front of the set press and hold both the menu and input (label may be source) for at least 5 seconds and release both.

Power light will blink a two digit error code like 1 blink, 2 blinks and pause and repeat it for a total of 5 times.

If you have unplugged the set it will always show the 1,2 above which is no error found, power it back and turn it on again, when fails do the check again.

let me know what error you find.

Dec 17, 2012 | Televison & Video

1 Answer

I have a rear projection Mitsubishi VS-70803 and fixed it with the help of eagle338 it was working fine for a year and a half. So new issue is I was watching TV and all the sudden i hear a faint spark


The set MAY have the self check feature.

If the set is plugged in and you turn it on and a few seconds later the power light goes off:

On front of set press and hold both the menu and input (device on some) buttons at same time for at least 5 seconds and release both.

Power light should then blink a two digit error code like 2 blinks, 2 blinks a pause and repeat the error for a total of 5 times.

If you get an error code let me know what it is.

May 22, 2012 | Televison & Video

1 Answer

Mitsubishi ws55813 picture turning off


The model indicated has a self check feature.

If turned on and green power light comes on and a few seconds later goes out:

On front of set press and hold both the menu and input(device) buttons at the same time for at least 5 seconds and release both.

Power light will blink a two digit error code like 2 blinks, 2 blinks, a pause and repeat it for a total of 5 times.

Let me know what error code you find.

If you unplugged the set--you will have to plug it back and attempt to turn it on--unplugging set clears the error buffer.

May 16, 2012 | Televison & Video

1 Answer

My 65 inch projection TV turns off within a few seconds when I turn it on. Why? No pictures or sound.


If power light does come on and a few seconds later it goes off---do the self check that the WS65909 MITSUBISHI should have:

On the front of the set press and hold both the MENU and INPUT(OR DEVICE) BOTH FOR 5 SECONDS AND THEN RELEASE BOTH BUTTONS.

Power light should blink a two digit code--error code---for example: 2 blinks, a pause and 2 blinks.

Let me know what code you get----it will repeat it several times---and I will tell you what it means.


SD TECH

Nov 03, 2009 | Mitsubishi WS-65909 65" Rear Projection...

1 Answer

No Picture, Power light Blinking 3 times then repeats


3 times blink shows lamp cover is removed or not installed properly on TV.
Please take out lamp inside TV and check, seems its broken as you heard loud pop.
Thanks.

Aug 28, 2009 | Sony Grand WEGA KDF-55WF655 36" Rear...

1 Answer

Turn on the tv a few seconds later it shuts the power light blink


Replace both of your convergence ICs they are STKs big black ICs will have part number on them.

Jun 19, 2009 | Mitsubishi WS-55511 55" Rear Projection...

4 Answers

Tv tunrns on then goes to stand by flashes 4 times & repeats


turn tv on picture comes up 2to3 seconds later tv blacks out then stand by red light flashes 4 times in a row repeatedly..can not turn on or off when stand by light starts flashing but before tv blacks out you can turn tv on and off repeatedly and picture and sound work.You have to unplug power cord for 30 seconds after stand by light comes on to get tv to turn on.

Mar 13, 2009 | Sony BRAVIA KDL-32S2000 32 in. LCD HDTV

1 Answer

Power problem


Three blinks - B+ over voltage protection (OVP), unit goes to the standby mode then displays the 3 blink fault. This is also a problem in the power supply circuit, check T603 and R672.

Jan 30, 2009 | Panasonic PT-47WX42 47" Rear Projection...

1 Answer

Turn on the TV and only Timer light is on , no sound & picture


after holding down the menu and device the led will blink a two digit error code such as 3 blinks pause then 4 blinks then repeat that sequence a couple of times. Need that blink code to help let you know whats going on. The 34 code means lamp abnormality which translates to the power Pwb capacitors have most likely failed.

Jan 23, 2009 | Mitsubishi WD-52525 52" Rear Projection...

Not finding what you are looking for?
Panasonic PT-47WX42 47" Rear Projection Television Logo

397 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

73635 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...