I think item like this are difficult to get repaired as getting the parts or the labour can be just as expensive as replacing it.
Have you thought about trying to contact Sony or where you purchased it originally?
Camcorder is suddenly refusing to record suddenly.
A little yellow symbol (not present in the instruction booklet of course!) appears and it beebs away at us.
It could be indicating that the heads need cleaning.
If you've been using the same tape a lot, stop using it. Then, try a head cleaning tape and then a new tape.
A few years ago, I had a repair job done on a €2000 in a place in Fairview called 'AV Services'. I'd dropped it and wrecked the mechanism. Cost then was €300. I'd say minimum cost just to assess your camera would be €100, they'd tell you if it's worth spending any more.
But, first, try the head cleaning procedure.
Don't use the old tape again, if I am right, it's probably shedding oxide onto the heads.
Other possibility is moisture/condensation. Just leave the camera at room temperature for a few hours and try again.