I have a UFX, it is one of the very first out the gate when they were first released, I had pre-ordered it even.
It has been in almost continuous service since then. Never have used the reverb or delay on it at all but I turned on the
reverb and echo the other day. The reverb is working but when I enable the echo, it spits out popping and cracking continuously on the FX out bus. I'm 99% sure I am not feeding it any sends, but even if I was it shouldn't be popping.

I re flashed it and updated drivers, also total reset in TotalmixFX to no avail.

Time to send it in?