Question about Toshiba 36A40 36" TV

1 Answer

Blurry image I have a 35-inch Toshiba TV (TV only, not combo). Bought it from Best Buy in February 2005. Turned it on last night, it made a loud pop and now the picture is blurry in the middle (outside edges are much clearer). Please help.

Posted by on

1 Answer

  • 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.

  • Toshiba Master
  • 5,568 Answers

I see your message is old enough to shave so you have probably done something with either that one or replaced it. But, if not; 
Popping can have several origins; without hearing it, I have to guess but the high voltage circuit can do this when discharging to ground through normal household deposits.
A failed capacitor can be quite loud if they have built up pressure inside and then burst; they even have score marks found on the larger ones to allow the case to burst in a somewhat less lethal manner. If those weren't present, the case could throw shards of aluminum.
The following has been pasted and modified for your situation from my 'Tips' folder:
If you are adventurous, you might pull the plug on the set, allow the set to sit overnight, gain access to the innards, and with good light, inspect any boards inside.
If you see an area few ICs but many more larger discrete parts, this will be the power supply.
Again, before touching anything inside, especially on that board, allow at least several hours to be safe since the larger capacitors and the CRT can hold a painful voltage charge for some hours.
  
You are looking for components called electrolytic capacitors that are almost always cylindrical and mostly installed upright at 90 degrees to the board with leads passing through to the solder side.
This same type of component in smaller dimensions is still used in a horizontal package with leads bent down and passing though holes to the solder side.
The latter are becoming more rare since they don't lend themselves well to robot assembly.
Many failed caps (not all) will show signs of pregnancy when they fail, bulging unnaturally at the top when compared with others. Now and then, there may be traces of a crystalline deposit around the end where the seal failed from internal pressure.      
These will have values listed on them in uFd & VDC and sometimes, a plus/minus number lying about the precision.
Some also have a date code (rarer) that will look like four digits:
 
2403 = 24th week of 2003
 
Most electronics suppliers have a stock of the various values but if they have a date code at all, try to get only those made before 2002 or after 2006.

 
The larger caps will probably be OK since the failure is likely related to functions other than brute-force filtering. A pretty good 'rule of thumb' is to replace any caps you see bulging of any value but especially those that are 100 uFd or less.
 
If you see signs of overheating such as discoloration of the board material, it may not be repairable but if you can find a part number on the board, you might be able to buy the power supply and install it yourself.
If there are no signs of heat damage to the board, there may be companies offering to repair it as a subassembly instead of repairing the whole set which could be much more expensive.
If you choose to replace it or have it done, the power supply still may not be at fault since most are capable of switching on and off if a downstream problem is causing an overload.
 
If you choose to replace failed caps yourself, you will need a quality soldering iron with a small, preferably iron-plated tip, rosin core solder and a sponge which when wetted is used to frequently wipe oxidized solder from the tip this should be kept bright and clean and fresh tinning will keep it that way.
 
You should also buy some solder 'wick' with the iron; this is used to place on the solder you wish to remove and then heated with the iron. Properly used, the wick will absorb nearly all of the solder from the lands from which you wish to remove a component.

Posted on Nov 27, 2008

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.
goodluck!

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

There are blurry lines, distorted images, with no color on the screen of the AKAI CTD 1390, 13 inch TV/DVD combo. How do I fix this?


Video output section circuit [CRT base card]; fault. Contact any service technician. If you wish to get some details; check the site linked here. Pull up older posts. Surf the site with patience. http://electronicshelponline.blogspot.com/

Nov 14, 2014 | Akai CTD-1390 TV

1 Answer

Menu keeps popping up ever few seconds, wont go away.


Check and replace the main system control memory IC. It is faulty.

Feb 11, 2013 | Toshiba 35A44 35" TV

1 Answer

My tenplus year old Toshiba 32" TV is stuck in standby mode


You have an old tv so the best problems are bad capacitors and bad grounds. Have someone pull the board and search for high voltage caps [160volts or 250 volts] with 1 to 4.7 microfarads. Should be two or maybe three and check all grounds. If the 4 amp fuse is good than the above will save your TV.

Sep 24, 2009 | Toshiba 32A33 32" TV

1 Answer

Toshiba 32D46 - White Lines at Top Of Display and TV Not Turning


Ok, so know you own an LCD or Plazma set, visit the dumpster where your Toshiba is or perhaps your basement just for old times sake..

May 30, 2009 | Toshiba 32D46 32" TV

1 Answer

Television repair


This Tv meesed up Vertical IC LA7033 ( LA7830) ( defected) and 2200uf 35 v, 100uf 35v, need be replaced all together, other possible cause, convergence (2) IC's stk392-110 . you can buy on matelectronics.com or tritronicsinc.com I will help with this . Thank you

Aug 12, 2008 | Toshiba Televison & Video

1 Answer

Sound problem


unplug it for a day. try again... the microprocessor is confused,

also check the button on the volume up and remote too make sure its not stuck down.

Dec 07, 2007 | Samsung DLP HL-P5663W 56" TV

1 Answer

Television won't turn on


it is best you buy another set my friend it is not worth fixing the money you have for repairs and the cost for components put it together and you will get a good tv free of repair worries plus with warranty.if you get that set fix bam you take it home then about a week it is back in the work shop again.you will have to spend more money.a 10 year old set is not worth to have it repaired.replace it.good luck my friend.

Jun 12, 2007 | Sony KV-35S45 35" TV

1 Answer

JVC AV-32F704 32" TV Picture is blurry - cannot read any writing on the screen


You didn't mention if you saw fine white diagonal lines running through the screen from top to bottom. If so, you likely have a shorted Picture Tube which is not usually fixable. If there are no lines seen running through the screen, then it is possible the High voltage transformer which also has a screen voltage and focus control built in that could be bad. I would expect the cost of that part to be about $100, so the repair cost total could approach that of a new set I would guess.

Apr 12, 2007 | JVC AV-32F704 32" TV

1 Answer

Toshiba 32" 2-Tuner PIP TV - Loud pop - then static


HI greetings from Belize.from the explanation i believe that there is two thing you might be having a problem in your tunner section whereby the tunner is going bad or the tunner circuit . or the cable from your wall is not connected corectly might lose.the video 1 and two is not associated with the tunner some how thats is the reason you did not get any disturbance.if your cable connection is good.then have your set checked out by a tech.good luck.

Nov 14, 2006 | Toshiba 35A44 35" TV

1 Answer

Sony Trinitron TV will not turn on


First thing that comes to mind is that the horizontal driver transformer has bad solder connections on the primary and the secondary windings. Also a set this old could also have a defective regulator IC if you dont know wht m saying , b=est thing to do is find out how much an estimate is then go back to best buy and see what a new set cost cause man you got your moneys worth outa this one for sure!!!!! Good Luck

May 02, 2006 | Sony FD Trinitron WEGA KV-36FV300 36" TV

Not finding what you are looking for?
Toshiba 36A40 36" TV Logo

77 people viewed this question

Ask a Question

Usually answered in minutes!

Top Toshiba Televison & Video Experts

The Knight
The Knight

Level 3 Expert

69955 Answers

Donald DCruz
Donald DCruz

Level 3 Expert

17129 Answers

matt martin
matt martin

Level 3 Expert

1198 Answers

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

Answer questions

Manuals & User Guides

Loading...