Hey did buying the new/used amp ever fix your issue? I have the same problem on my 01 UL. The radio doesn't come on at all, then with the radio off the speakers start making an annoying sound that sometimes gets very loud. It's like a scratching noise that may actually damage my speakers. Please let me know if that actually fixed the problem because there's only one guy on eBay who's selling this amp and he wants $900. Just wanna know if that's the only way out. Hope not but would help to know. Thanks in advance.