This unit came in with no sound or picture
do you have any ideas?
No picture or sound. When I plug into wall power light comes on momentarily and sounds inside like when TV normally powers up. But nothing after
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This should be a quick fix. Try resoldering the vertical IC. This is a small flat IC attached to a heat sink with about 11 pins. It should be marked LA7837 or something similar. That should resolve the problem.
The most common problem (I have fixed lots) is the Vertical amplifier has developed a loose connection. It probably just needs resoldering. As things expand it makes and looses connection you picture goes in and out. The vertical chip is a large black chip that gets hot, over time it degrades the solder until a connection is damaged. Most newer sets have a protection circuit that senses the lack of height, and shuts down the picture tube to save it. When the picture dropped to a line on older TVs and left that way too long it would burn a line into the face of the picture tube. You then had to have the picture tube replaced along with the vertical amp. it's kinda like a screensaver for your TV.
Your set has cracked solder joints, most likely on one of the small regulator transistors on the main board, with its own little heat sink. I have seen that many, many times, and it is a very simple thing to correct. Loose solder joints on the vertical output IC can cause no picture too, but it is usually those regulators that cause the problem. The set needs to have those regulators, the vertical output IC and all other major components resoldered and the set will play fine. If you do not have experience resoldering small parts on PC boards, allow a qualified tech to handle it for you.