Hi, I have Sony wm bf-67 and has a problem with audio, at first when I foot it there was no audio at all in both radio and tape I opened it up and put a new belt , while working on it I noticed some corrosion like in photo, I cleaned all with alcohol and then with contact cleaner , and now the radio is working but with low volume, and the tape just make some beeping noise. Are the capacitors all to replace or just some? Or what else can be the problem? thanks
