Question about Toshiba 53HX71 53" Rear Projection HDTV-Ready Television

2 Answers

Won't turn on

This TV has an excellent picture (which is why we want to fix it and keep it) - except - it won't turn on. Point is, the set is fully operational and generally in good alignment except for this powering up problem. For some months, the set was turning it's self off, and then, immediately back on. In every instance it turned it's self off, the set would immediately, instantly, turn it's self back on. Sometimes, it wouldn't do the turn off and on thing for weeks. Then, it would go through a few day cycle where it would turn it's self off and on every five minutes. Then, it wouldn't turn off and on for days. There was no way to predict how often this sequence would happen but, over a period of months, it happened a lot. Giving it a few seconds to account for the soft start up, the image always, immediately, came back up with it's usual very good image. There was a relay sounding click clunk every time this off on sequence happened. If you looked very carefully at the red power light on the front of the TV, you could see that the red light did momentarily go off and then back on again. The red power light was off for such a short duration that you had to be looking at it before the set turned off or you'd be way too late to see it go off. The off on sequence happened very, very quickly. Then, one day, the set would not turn on at all. The click of the relay sound was there when you attempted to power up, but no picture, no red power on light. During the time the set was turning it's self off and on, the set would always turn on every time, without fail. Since the time it decided not to turn on, it has not turned on once. When it quit, it quit. I suppose that you, as an expert who is reading this, knows precisely where these power on relay clicking noises come from - but - just in case this helps.... At the very rear of the set, there are two large high voltage looking (just my idea of what it looks like) black bakelite? blocks that have large wires that look like car spark plug wires connected to them. The clicking sound appears to be coming from the smaller of these blocks. It clicks every time you try to power up the TV but the TV has never turned on since it initially failed. Once the set did not turn on, it was one and done.

Thanks

Tom

Posted by on

  • tomjoy315 Dec 12, 2009

    This site encourages me to get another opinion so I will. If the power supply board is ineed required, is this the sort of thing that I can readily buy from someone? - does Toshiba still support this TV?

  • tomjoy315 Dec 12, 2009

    I was wondering what might cause this intermittemt problem. I'll go board by board and find it.

    BTW, thanks for the heads up. Generally speaking, I always try to stay away from big ugly things.

    Thanks
    Tom

×

Ad

2 Answers

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    Superstar:

    An expert that got 20 achievements.

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

  • Master
  • 6,927 Answers

I will tell you what I think it is.Note,high voltage,capacitors stay charged when tv is unplugged.Just don`t touch those ugly big things in there,lol.Now these circuit boards will unsnap,and come out,to a point.Some wires may need to be unplugged.They will only plug up in one spot,when you go back with them.Oh,and trust me,do not use a vacuum to clean it out,the dust,and debris is magnetical,it will ruin the vacuum,and electricute you.Blow it out(using face mask)with air pressure.Use googles too.Now when you pull these circuit boards out,look under them.You are looking for a burned spot.Look where the solder joints are,holding a heat sink,from the other side.This is a block looking thing,about 2 1/2 by 2 1/2,by 3/4 in thick.Has fins on it.This has a chip on it,that is on the heat sink.The burned out spot is a cold solder joint,this means bad solder job,from factory.Clean it with electric contact cleaner,that you can get at N A P A auto parts,or radio shack.Then re -solder the leg of the heat sink to the circuit on the board.The leg,looks like a piece of small wire,One stran of stiff wire.This solder was not holding contact,and melted away in time,causing it to short on,and off,killing the tv,and trying to work.Pull each circuit board and inspect under each one.I hope you find this problem,and it fixes the problem.If you need to ask anymore questions,please ask,thank you,if this was helpful,please let us know.

Posted on Dec 12, 2009

  • Ronny Bennett Sr.
    Ronny Bennett Sr. Dec 12, 2009

    If you can repair it,it will be almost cost less,but the board can be purchased on line,type in brand ,and the model,then the number on the board,lol,on the ugly things,hope it turns out good,I think it will.

×

Ad
  • Level 2:

    An expert who has achieved level 2 by getting 100 points

    Superstar:

    An expert that got 20 achievements.

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

  • Expert
  • 2,973 Answers

Tom,
From the description of the problem and sequence of events, it seems that the power supply unit has gone finally. It started giving trouble long back and finally it just died. Please replace the whole PSU as replacing only the relay or whatever will not do in the long run. If you change the whole module then you could use it with confidence. PSU can be located where the power cord is joining the small PCB. This PCB would also have a small transformer on it. It would be easier too. OR, should you feel confident of your soldering skills then go ahead and replace the what you describe the bakelite looking block. But make sure you have exactly the same specifications stuff as replacement.

Posted on Dec 12, 2009

Ad

1 Suggested Answer

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.
Good luck!

Posted on Jan 02, 2017

Add Your Answer

Uploading: 0%

my-video-file.mp4

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

×

Loading...
Loading...

Related Questions:

1 Answer

Samsung 13 tv can't get it to run what can I do?


As you and I don't know what the problem is, certain basics have to be first covered. Here is a link describing basics for any TV.

TV Power Light Comes On But No Picture Or Sound

As I don't know if you have an active led power light, here are a couple of videos:

EASY HOW TO FIX SAMSUNG TV NO POWER

Samsung TV Won Turn On How to Repair Bulging Capacitor for Clicking Noise

Samsung TV Won Turn On Has No Power No Standby Light Samsung LCD TV...

If the set is powered up, you can try resetting it to factory defaults. Yes, any of these suggestions may not work but one of them might fix your problem. You might try searching for tips by including the model number in the search. Bear in mind you are dealing with a high voltage device and your next repair may be at the hospital if you are not exceptionally careful.


Feb 28, 2018 | Samsung Televison & Video

1 Answer

Toshiba 27"CZ27V51 when I first turn it on the red light will blink, but no picture/sound.


dust is not the problem.they most be an open cecuit on the cecuit,just open the tv and look persiently if u can fine the open cecuit and resolder it with a soldering iron if only u can do it but if u can't take it to a qualify technicien

Sep 06, 2015 | Televison & Video

1 Answer

Hi we have a 720 Magnavox flat screen tv that is about 5 years old. When i went to turn it on the other day the picture started flasing and making a chirp noise.. and won't fully


power supply problems does it have a separete power supply if so you can try to change or if you have someone with the same you can ask to try it.if its internal power supply it needs to be fixed.

Aug 20, 2012 | Magnavox 37MF437B37 37 in TV

2 Answers

Tv keeps turning itself off and the white in the picture looks alittle off.


To get the right colors, especially a plain white, requires the right mix of red, green and blue from the picture tube. Sony TV sets have a circuit called AKB that automatically keeps the picture tube balanced by adjusting the signals to it. If that balance can't be achieved it shuts off the picture. This may due to tube aging so one of the color guns is too weak to adjust, or failure of parts in the AKB circuit itself. If the sound stays on and the power light starts blinking when the picture goes off, this is likely why.

On the other hand, if the set is turning off completely with no picture, sound or power light, the set may have power supply problems or defective parts in the picture tube high voltage circuits.

Since there are several possible causes, this set needs to be checked by a technician who can diagnose the problem and decide what needs to be done. It's not a simple thing I can point to and say "change this part". If the picture tube is the cause, it's better to replace the set. Otherwise get an estimate, then decide whether to fix or replace.

Apr 04, 2010 | Sony FD Trinitron WEGA KV-36HS20 36" TV

2 Answers

Need code for asda remote model#URC20-D1F for use with my sony tv


URC20 D1F

Set up by Automatic Search

1. Turn TV on
2. Point the remote at tv and Hold SET and TV buttons at the same time and keep pressed for 3 seconds.
3. The LED flashes and the remote control starts the automatic search.
4.The OFF signal is automatically sent to the tv from the remote control.
5. Once the TV switches off press any button except SET to stop auto search.
6. Switch your tv on using the POWER button.


Sony TV codes

010,011,028,030,031,077,107,128,131,166,203,237,302,309,367,444,445,446,449,160

To enter. Just hold SET and TV at the Same time.
The red led light stays on you are in set up mode.
Enter the first code on the list and try power button.
Keep following the steps untill you can turn the tv off.
Then its set.

Feb 08, 2010 | Televison & Video

1 Answer

Blue Screen with thin horizontal white lines


THI IS THE INTERNAL CIRCUTRY FAULT BEST YOU
call the service person and dont try to open it other than in side of TV SET HAVING Hazard of electrical shock be handle most care fully .
and check video board and all.

Oct 19, 2008 | Philips Magnavox 20MS233S 20" TV

2 Answers

Scrambled picture


I have the same problem here as well, except that it has been happening so long that now it doesn't get completely clear. The picture was great at one time :-(

Jul 07, 2008 | Toshiba 50H81 50" Rear Projection...

1 Answer

Rca 52 inch keeps shutting off and picture is curved


The curved picture indicates failing parts in the pin amp section and probably some faulty parts in the scan amplifier sections. The set is being turned off by the uPC because there is a fault indicated, and it is going in to protect mode.

The set will have to be properly serviced.

Jerry G.

Aug 21, 2007 | RCA 32V420T 32" TV

Not finding what you are looking for?
Toshiba 53HX71 53" Rear Projection HDTV-Ready Television Logo

Related Topics:

69 people viewed this question

Ask a Question

Usually answered in minutes!

Top Toshiba Televison & Video Experts

The Knight
The Knight

Level 3 Expert

75311 Answers

Donald DCruz
Donald DCruz

Level 3 Expert

17130 Answers

Jaime Hernandez

Level 3 Expert

2336 Answers

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

Answer questions

Manuals & User Guides

Loading...