I have a 3 year old Vox night train, and its been having some minor issues: the power has inexplicably shut off (indicator turns off) twice now, even though I got it tuned up recently. I had success with using a different outlet/removing other devices that shared the outlet with my amp, but I worry that it's something internal. The fuse is fine, so could it be the tubes?
Fender American Standard Telecaster
Vox Night Train 15W
An ever-morphing BOSS and MXR loaded pedalboard

"I eats more chicken any man ever seen!"
-Howlin' Wolf
Yeah with 3 yr old tubes it is certainly something to replace
2002 PRS CE22
2013 G&L ASAT Deluxe
2009 Epiphone G-400 (SH-4)
Marshall JCM2000 DSL100
Krank 1980 Jr 20watt
Krank Rev 4x12 (eminence V12)
GFS Greenie/Digitech Bad Monkey
Morley Bad Horsie 2
MXR Smart Gate