I bought a Tweaker 40 used a few weeks ago and love it but I turned it on this week let it warm up and turned on the standby and no sound so I turned it off and back on and great sound again.Yesterday turned on and worked fine but noisey and then cut in and out to dead and in and out...................I will replace tubes and hope that is what it is, the amp looks brand new.
First try simply pulling out the tubes and plugging them back in.
I'll try that first....................
yeah mess with the tubes or replace them and then worry. ive had my tweaker about 1 to 1.5 years and i had 1 power tube blow. normal. i play a lot. other than that nothing wrong. solid amp.