My Funhouse did the EXACT same thing. I fixed it today in a few hours by installing a relay mod I made from the instructions described here: http://tuukan.fliput.net/nonoise_en.html
Cost $14 in parts.
The machine used to screech loudly when I powered it on. Here's a video:
And after the $14 modification...
Sweet silence! Thanks Taru!
http://tuukan.fliput.net/index_en.html
I will recap the soundboard and woofer and report back. Thanks!</blockquote