Hi everyone! This is my first post here! I came across this Columbia Masterworks Model M500 Audio High-Fidelity Series Stereo w/TT in a thrift store, I've got two weeks to return it, does anyone think it's worth the trouble to work on? It works, powers on, but the left channel is out on both the A and B channels. I found an old thread on here with the same problem and I might try some of those solutions, but is this worth anything? Are they desirable, rare, collectible? Anyone know the quality? Made by Columbia Records in the 60's? It's got a fairly nice BSR TT, and I know the TT works because it has RCA jacks that connect it to the amp, so I connected those to my Technics stereo and both channels work, although the bass seems over-pronounced and distorts on heavy bass notes. In order to get any further I'll have to tear it down some more and, again, just wondering if it's worth the effort.

Thanks!!!!!

p.s.-- I've also got a newer but vintage Sony with one channel out on both A and B as well. It was working great and then one day, no left channel. Did a cap blow? Diode? Can I use parts from the Sony to fix the Columbia?

Thanks again!!