Question about Toshiba 50HX70 50" Rear Projection Television

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Toshiba 50hx70 sound but no picture

No power to f470 or f851

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NORMALY SOUND BUT NO PICTURE IS THE LAMP YOU SHOULD CHECK THAT TO SEE IF ITS BLOWN

Posted on Mar 07, 2009

  • JEFFrey BAKER
    JEFFrey BAKER Mar 07, 2009

    NORMALY SOUND BUT NO PICTURE IS THE LAMP YOU SHOULD CHECK THAT TO SEE IF ITS BLOWN

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No Picture on Toshiba 50A50


Check the fuse at F851 if open replace with 3.15 or 4 amp slow blow.
Hope this helps!
Bill

Aug 22, 2009 | Toshiba 50A50 50" Rear Projection...

1 Answer

Toshiba 50H72 problem plz help!


ok well both of you have had the same problem i did... to fix the picture problem check the circuit board pd0074 its the yellowish looking one next to the green one which has the ic's on them... ok on the pd0074 board look for fuses f470, f850, and the f851 to see if they are blown the f470 is what turns the tv on and the f850 and f851 are what protect the convergence ic's chances are they are blown.... the sound i don't know how to fix that problem but i would check all the fuses on that board to find out if one more is blown that what i did but the only thing is that i could get the actually fuses for the tv i was told by a tv repairman in my town to just take 2 wires sodder them on to the fuse and take a glass fuse and put electrical tape around them and it worked like a charm... so i hope this helps you.... the most i spent was 30 dollars for the ic's and the fuses all together and i was quoted at 450 to do what i did myself

Oct 31, 2008 | Toshiba 50H72 50" Rear Projection...

1 Answer

Toshiba 42h81 no power


The third is likely B+ and having failed that no Hv will be present... It's likely in the convergence circuit. Do a continuity test of F850 and F851 (5a), F470 (2a) and F890 (3.15a). If any of those are open trace back along the +16v line to the convergence Ics and make sure everything is well soldered. Then check R482 (270 ohm) for value. If out suspect Z801 the divider and replace R482. If that isn't the problem suspect the convergence Ic's and/or the yoke return resistors.
Bill

William Rayburn, CET
Premium Technologies
PO Box 442
Long Beach, WA. 98631
360-642-4993
premtech@willapabay.org

Sep 04, 2008 | Toshiba 42H81 42" Rear Projection...

1 Answer

Toshiba projection tv


check for solder bridging between the IC pins. also make sure the wire connections are back in the proper locations

Feb 14, 2008 | Toshiba 50HX70 50" Rear Projection...

1 Answer

Toshiba 50HX70 - red blinks but TV will not turn on...


Hi, you`ll need to call the tv guy then, you have a short in one of the power supplies, or possibly broken solder connections, either way the board has to come out and board repaired or parts changed, BMW Rider

Dec 02, 2007 | Toshiba 50HX70 50" Rear Projection...

2 Answers

No video, Blown fuse f470, audio works great.


check your h uot transistorthen check pico fuses

May 26, 2007 | Toshiba 50HX70 50" Rear Projection...

1 Answer

No pictures and no sound on Toshiba TW40F80 television


Check soldered-in micro fuses in power supply. Ex.--F851,F852.
If there is a blown fuse, identify which B+ circuit it protects.
Most common - convergence IC's bad===replace.
Need more help? Let me know.....T.

May 21, 2007 | Toshiba TW40F80 40" Rear Projection...

2 Answers

Tv repair


This happened to mine. It was a fuse that cost $3.42 but the service call was $200! If I knew how to do the freaking work I'd be rich!

Apr 09, 2007 | Toshiba 50HX70 50" Rear Projection...

3 Answers

Flashing red light


You might want to check http://tacpservice.toshiba.com/TACP/subpages/pdfs/TechBulletinsTV2002.pdf the first Item talks about power LED lights Power supply does not start

Sep 27, 2006 | Toshiba 57H81 57" Rear Projection...

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