I have a 1980 Technics M51 very good condition Cassette deck player that has not been used that much over the years. I also have a back up one the exact same one that I originally bought back in the Navy in 1980 in good condition. Its having trouble I need someone to look it over for me and give me your expert opinion on what could be wrong with it and remember I have an extra one that can be used for parts say either way. I also have very good condition cassettes that need repair on the actual tape the glue no doubt dried up but I want them fixed they are vintage!! Thanks if you can please let me know ASAP!! Gregg the phone number listed is my home phone landline with an answering machine I am usually around leave a message.