First, I 'd like to thanks everyone for helping out. I was hoping that it was a fuse too but it turns out to be a lot worse than that. I have contacted Mark and he indicated that there is fuse in the power supply. Before that when I first received the preamp, I was very suspicious of the sound of moving part in the PS like something came loose. Yep, it sure is. As I open the PS, I found that the circuit board is not screwed to the case and couple of the heavy gauge soldered wires got broken off. In addition, one of the soldered wire to the CD RCA input jack inside the main preamp casing is also broken off.
I doubt if this is from shipping vibration since there is no damage to the box or the exterior of the unit. I have filed a dispute to Audiogon but not sure if it helps any. The seller has been ignoring all attempt to communicate. Oh well, look like I will have to take it to an audio technician or perhap send it back to Mark for repair and complete check over. Who knows what else is wrong with it.
