Rca 21 this tv had full picture then went to half a picture

RCA/Westinghouse HV320WXC1007061 T-Con Boards ...

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https://www.youtube.com/watch?v=5jO_TZfplR0
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RCA TV Repair Westinghouse TV Repair T Con Board Tutorial & No Picture ... Top Common LCD TV problems for bad TimingControl T-Con Boards: .... VR-3215 with no picture no sound but the power LED is solid green, any ...

RCA 276046 Power Supply Unit (PSU) Boards ... - YouTube

I think you may have a tv tube problem...

Half black? top/bottom or left right?

The set is rather old--a old trick to use is to connect a fan to the rear of set with the back off--it may extend the life of the set and give you some more use out of it.

I have seen a lot of these sets and never one with the problem you describe. If only a picture top or bottom is missing it may be vertical or if you are seeing what looks like a full picture with top or bottom black it is a Blanking problem--may not be easy to find...........

The YSUS control board has failed from the description given. This is typical of the symptoms presented. It can be removed fairly easily and sent to a repair center to be repaired.

RE-SOLDER VERTICAL SECTION & CHECK IT.ALSO CHECK PIN CUSHION SECTION.

tv dispays video and audio on lower half only and black on top half,27v513t rca model.

The beeping sound is most likely the high voltage generator needing replacement. This is a fairly easy job if you have some tech support to discharge the picture tube. You can go to the following link and leave them an email with your model number and your symptom and they will email you back with the part you need and they provide free tech support with instant messageing so you can do the repair yourself. the HV generator takes about a half hr to replace and takes only the basic soldering ability. heres the link.
http://servicemanuals.vstore.ca/

check these two resister also R19702= 750k, R19703= 750k

Hi JDRJR35,

 

Here is the internet address on the usewrs manual for your LCD TV.

http://tv.rca.com/RCATV/RL/1652880A.pdf

 

Now I will read through it and write down the procedure t be sure you get what your need.  See my next post in a few minutes.

Try , Horizontal or Vertical output.