Hello,

I got my DSL40CR brand new in November.  I love how it sounds, but it has an annoying and random issue.  Whenever I've been playing my amp for an extended period, about 30 minutes or so, it starts to hiss and buzz.  It starts quietly at first, but in the next few seconds, it gets louder and louder until it's ear-shatteringly loud.  The only way to fix it is by shutting it off and waiting a few minutes, and then the cycle will repeat in an indeterminate amount of time.  Turning it on standby mode does not fix it; shutting it off then immediately back on also maintains the noise.  The only way is to wait a few minutes.  This problem solely depends on how long the amp is on, as playing or not playing the instrument for the full period will result in the same problem.

What is the issue?  And how could I get it fixed/fix it myself?