I have a 46"rca home theatre,model #p46921,serial#022441797 and I have cob-web's behind the screen,how do I get them out?

That unit is really obsolete. THe service manuals are here:
https://www.samswebsite.com/en/photofact/search?s=Search&t=model&o=0&k=P46921&submit=Search

Just make sure of the entire model number

I have a P46921 46 in rear projection television. I brought it in and they told me it was the processor board (main control board with programming) that wasn't letting the TV turn on and was quite an expensive repair. I now have the parts back and was wondering if someone could use them. I know that some people were looking for the actual screen found behind the plexiglass or what looks like plexiglass. I have all the parts and was told that it worked beautifully until it decided it wouldn't turn on again. Anyone interested, please drop me an email at [email protected].

Thanks.

RCA projection TV was working great and then suddenly would no longer turn on like there was no power to the unit.

There is a service menu that techs can use to adjust vertical and horizontal widths. If it is not an aspect ratio problem then it is likely that it needs to be adjusted.

The back comes off the unit.  Lots of screws.  If you do this, DO NOT touch anything related to the tubes.  Power it off for several hours...unplugged...before touching it.

I got one for a p46731at for $150 plus shipping which may need to be trimmed if you still need one. Call Electron Resort at 1-919-735-9139

if you can get pic using an external input you've got a tuning failure, if not video processing.

The convergence circuit is your problem and most times with this model the convergence power supply bd. is the problem.

try here:
http://www.mcminone.com/content/content.asp?pid=promo/mfr/rca&CMP=authrca

Bad Flyback xformer = P46921YX1 Part # 239111

P46921YX4 Part # 250694.....................................T.