Help---What happens when a tube

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

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

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.

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

Bob,
In my opinion a good tube should not have gone bad with such a short number of hours on it. Are there any fuses to check or a re-set button to press?
You might try checking the AC outlet to be certain there is power, and turn the unit off for about ten minutes and then back on and see what happens.
Finally, you can put a call into the store you purchased it from or call the manufacture.
Good luck and let us know the outcome please.