[Coco] Coco 3 with problems, can anyone help me troubleshoot?

[haywire666 at aol.com]

I have a color computer 3 with some problems. I thought it was a cold solder joint or something. Occasionally it would not boot right (I'd get a garbage screen) The real problem however is that once its working, I can save programs with csave to cassette, but when I try cload, I get an S on the upper left corner of the screen and then it just hangs. 

Has anyone seen this before? Can anyone give me some trouble shooting tips? Not being able to save programs (just bought a cassette for that purpose) is driving me kind of nuts.






Steven