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Question about Toshiba 19A25 19" TV

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Broplem there is no picture on tv but the sound is ok and whene i hit the line transformer the picture comes on for a while then its gone againe aii other fanction work allright

Posted by mic jhon on

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Anonymous

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I beleive the problem of your TV is the horizontal circuit probably cold solder. if you have soldering equipment, try to resolder the circuit. but if you don't know anything about this, i suggest you bring it to a qualified person.

Posted on Jan 14, 2007

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How to fix problem of jvc crt tv model av-21l31 power ok no video/audio no display with lines coming from flayback

Look at the horizontal output transistor then the fly back transformer.Check ALL the voltages coming from the power supply. One or more of them have to be missing for the audio and video to be gone at the same time.
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No picture displaying but sound coming through ok

Check and replace damaged component/s at its horizontal scan output section circuit. Check the LOT (Line Output Transformer) too for damage. Replace the horizontal scan output transistor. Check the input voltage to LOT. If absent check the feeder resistor; if any. If you wish to get some details; check the site linked here. Viewing it in "Mosaic" or "Magazine" will make surf easy. Surf the site with patience. Pull up older posts.
http://electronicshelponline.blogspot.com/
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1answer

Westinghouse LTV-37w2 HD have no picture, no sound, no blue power light on - only some buzzing. What it can be ?

if it is just buzzing then the transformer has gone, may have over heated.it transforms the line in volts down to the volts needed to run the tv. so say 240v ac in and tv needs 110v ac. now the volts in will be making the buzzing sound but the coil on the 110vac side has gone. if you change the transformer. has to be the same colour and number. tv should be fine. as the coil in the transformer brakes its just like removing the plug from the wall and not do any more damage. so just the transformer will need changing.
0helpful
1answer

Picture on screen has gone to only 1/4 of screen with strong line through picture.

This sounds like the OPT or LOPT has blown or weak ( OPT = Line output transistor. LOPT = Line output transformer.)
This job should only be carried out by a professional engineer. I would take it to your local TV repair person. Hope this helps.
3helpful
1answer

I have a Phillips FLATTV model ... Problem with the Philips Flat Panel Televisions I have a Phillips FLATTV model 42PFL7662D/ 05 I have no picture, the audio is OK, I have had a hissing noise for about 2...

Try with that...
http://www.filestube.com/3c4e959f7e53ba6703e9,g/PHILIPS-42PFL7932-LC420WU5-V2-CIRC.html

Symptom:
Sound but no picture.

Cure:
Master or Slave inverter is defective.
It can be that the driver IC is defective or MOSF
inverter transformers, or 470uF 35V C
Replace driver IC BD9897FS or MOSFET's.
996500046243 IC BD9897FS
996500046242 Mosfet FDD8447L
996500046241 Zener KDZ100V
0helpful
1answer

Good sound, picture is flat lined. suspect flyback transformer.

Check for 28volts coming out of the flyback through resistor and rectifier , if it is there then you may want to look at the vertical output i.c , it may be gone or cold soldered which is common in those sets.
1helpful
2answers

Power light flashes 3 times and makes and alarm or chirping sound then nothing. its a 52 inch RCA hd52w59 itc222 chassis. I replaced cp150 and cp120/114 and also flyback transformer and still same thing? I...

Chirping sound is coming from coil on right side behind FBT, resolder then use Glue gun to glue on top of coil LL037,Make sure high voltage wire from FBT to Trippler is in Good this is what maybe causeing lines and fuzzy picture.Also make sure solder on all pinns of FBT are good.
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How to fix Telefunken tv mp162m'

i found out in my in dept probing around the line output transformer has gone so no tv it is to get recycled
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1answer

H.V shuts down/

try to check a bad conections in hv transformer and capacitor around them
0helpful
1answer

TV working, then suddenly no picture, no sound

could be flyback transformer cracked need replaced 48.00 for part or board replacement usually done at about $200.00 , part number is 9-2022
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