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Projection on screen rolls

When we connect the sound output from the computer to the sound board the projections on the screen will have a backgound roll

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Earth loops !! try a 1:1 audio transformer ( ground-loop isolator) available in car audio shops
cost estimated.$10-15.

Posted on Sep 26, 2008

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Vertical hold on a hitachi 53 inch projection tv, does not work on a/v inputs picture is stops rolling on hd inputs. Please help..


Hell
The set needs proper attention to its vertical output section, and synchronising seperatror sections. You must have through knoledge in electronics and repairing circuit boards. If you have, replace all the electrolytic capacitors at its vertical output section.

Feb 20, 2012 | Hitachi Televison & Video

1 Answer

I have a Sony ProjectionTv w/ a rolling screen issue...


Your haveing problems with the signal board just had this problem sometimes its bad connections check board that has all your jacks on it or were it plugs into the main board

Mar 04, 2010 | Sony KDF-50E2000 50" HDTV

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My toshiba rear projection TV's picture just went black. Sound is good just a black screen.


high voltage is not coming up. possible fuse locates on power supply board on the right if you are sitting behind set with back off. if fuses are good, possible horizontal output transistor shorted. sounds horrible but easy repair

Nov 10, 2009 | Toshiba 42H82 42" Rear Projection...

2 Answers

Distorted sound


Poor signal or poor connection to the cable probably. Could also be a speaker issue or the audio board on the tv is failing.

Most likely just poor signal or poor connection on the cable.

Oct 13, 2009 | Toshiba 42H81 42" Rear Projection...

2 Answers

Rolling lines until tv warms up


Vertical output IC bad capacitors in vertical circuit 100uf 35v sometimes vertical IC needs to be resolder and that fixes problem look for poor solder joint s.

Sep 27, 2009 | Mitsubishi VS-50605 50" Rear Projection...

1 Answer

Hitachi 53SBX59B model and the pow def board is an AP93/23?


Hey there, are you the one that called the company today? If not i will look up our original conversation and post back here soon.

Thank
Tim

Sep 16, 2008 | Hitachi 53SBX59B 53" Rear Projection...

1 Answer

TV screen jumps and rolls, sometimes won't stay on


Try Re-soldering the vertical yoke connection and the vertical output IC. Thats a common problem in that model.

Feb 26, 2008 | Mitsubishi VS-45607 45" Rear Projection...

1 Answer

Hitachi 53" Projection


take the lenses off and make sure that everything is clean under them. make sure to so one at a time and put them back on exactly how they came off. otherwise clean the mirror and look for some debris in between the screens

Feb 17, 2008 | Hitachi 53UDX10B 53" Rear Projection...

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