I have loved this preamp since the day I attained it, but today somehow it stopped functioning correctly. The pedal is getting the correct power, via the EBS power cable. All of the LEDs, and the tube are illuminated. When the pedal is bypassed the signal is great, but when activated I lose all signal. I tried fiddling with the db cut/boost and mute buttons, and that did nothing. Any suggestions? Thanks in advance for any help!