Help---What happens when a tube

I agree with Lak. Though instead of just turning off the unit for a few minutes
unplug it from the wall outlet for a few minutes. Even with the unit turned off, the unit maybe in standby mode, a microprocessor may be locked upped. Had any large static electricity discharge from your body to the CDP? Any lightning storms?
Disconnecting the plug from the wall outlet may reset it.... Worth a try.
http://www.pacificvalve.us/MHZSCD66.html

http://forum.audiogon.com/cgi-bin/fr.pl?ddgtl&1157763308&openfrom&1&4

I don't think I would leave a tubed unit on all of the time?
A good 12ax7 will last 3000 to 5000 hours. On 24/7 that will get you 4-6 months on a telefunken.
If your unit has cheapo Chinese or Russian tubes, you easily could have burnt it out. However, tubes usually die slowly-was the sound degrading over time?
Now that the unit is broken in, get a good 12ax7 and hear the difference.

Thanks------you ARE NOT GOING TO BELIEVE IT BUT--
MY DAUGHTER TURNED OF THAT OUTLET THAT WAS SWITCHED!

I am ready to tube roll---this is a fantastic player---
What would you try putting money aside for 12ax7's

I need to buy some different ones to try!

Thanks again,
Bob

Spend about $50 on a Telefunken and never look back. It will last years and sound great. Mullard may have a little more in the highs but less elsewhere. Amperex (Trumpeter, not cheap ones) will sound a little more "tubey" but lack a little detail.
See tubesandmore.com tubeworld.com -expensive&informative, echohifi.com, upscaleadio.com, thetubestore.com and jeffssoundvalues.com