[TenTec] Troubleshooting Titan 425 Problem

[Art Trampler]

Hey Gang,

Today before work I turned on my Titan and went to the kitchen for a cup of coffee.  When I came back the amp was dead; its fuses are blown.  I believe I was gone for at least three minutes.
 
I am hoping it will burn out to be a problem with a filter capacitor or some filter capacitors, but have this simple question:
 
Do I risk further damage to the unit and its tubes (if they are still good) by replacing the fuses and turning it on, to see when the fuses blow/if there are any other concurrent events, such as the it being ready to operate, etc?  If the failure is power supply related, I don't want to kill the tubes inadvertently by this.
 
Thanks,
Art, KØRO