NES Audio - Constant Buzz -- Help!

[NES Audio - Constant Buzz -- Help!]

Opened it up - removed all the guts. Looked at everything really well -- to my untrained eye, it all looks fine. Guess I'll have to buy another one -- I can't play without sound.

[NES Audio - Constant Buzz -- Help!]

My NES is being stupid. When I try to hook it up to play, I cannot get the game audio, only a constant, obnoxious buzzing. I've tried hooking it up using different cables... I've tried connecting it to different TVs... I've tried using the RF thingy which didn't work, then I tried the back up RF thingy I have which also didn't work... then I tried using the red/white cables which didn't work, then I tried the back up red/white cables which also didn't work. Everything else seems to be functioning normally, just no audio....and who can play with no audio?

I don't want to buy a new system. I've had this one for almsot 30 years and I want it to work. If anyone has any suggestions, or knows of someone I can send it to have it repaired, I'd appreciate it.

 

Thanks!