Then use a little thread lock on the gear post...I'm a trained and certified electronics repair tech and fixed many Camcorders, VCRs, TVS, Audio Decks, hard drives, etc. Most of the issues in those items were not electronic components but plastic and rubber pieces. Rubber revitalizer, silicone grease, and thread lock cost customers a small fortune...hence why I try to fix everything for anyone when I can...for free!

TVs on the other hand, used deadly high voltage. Had to be much more careful and have proper test equipment Al lot of times it was a diode, transistor, IC, or .25 capacitor.

Steve