MHDT Paradesea Repair? New Tube?


I have a MHDT Paradesea+ DAC. I stopped working the other day. I tried another DAC and it worked fine. When i plug in the Paradesea i can hear a VERY faint sounds coming out of the speakers. I tried going USB, coax...no go. Could it be the tube died? If not, does anybody repair these things? Is it worth it?
streetdaddy
Ok, called Andy at tube services. He said if the tube is fully lighting up it's not the tube. So, i took it up and sure enough the tube is lighting up. Looks like it is something else. Will look into either repairing it or replacing. Thanks for the info guys!
I am really questioning what he told you. Just because a tube is lighting up doesn't mean it isn't introducing noise. I KNOW this is true because I've experienced this myself, several times. I trust Andy completely but I am at a loss as to why he told you this where in several of my experiences it just ain't so. I would try another tube. It MAY not be the tube but at least you could eliminate the doubt one way or another.
Update.. So i trucked it back to the system and fired it up... Tube lit up fine... Then i saw little light emissions over by the on/off switch....so... I have an email into us distributor for repair/trade in... Might not be worth repairing it.. Will see how much it costs.