Amp instantly blows main fuse when switched out of standby

[Moloch]

I have a Bugera (I know...) 6260 infinium that has been working just fine until last week when I switched it out of standby, I strummed a chord and it was extremely distorted, in a bad way and blew the fuse. I then pulled all the output tubes and replaced them with the tubes from my Trirec and just got a new fuse today and this time as soon as I switched it out of standby it blew the main fuse.
Any ideas on what it could be before I take it to the shop and have a repair bill that's more than what I paid for the amp?
Thanks

 

[ihunda]

What's the status of the infinium leds at the back of the amp?

 

[Moloch]

What's the status of the infinium leds at the back of the amp?

Do they monitor the tubes in standby mode?

 

[7 Dying Trees]

When the original tubes blew it may well have taken out some of the power section stuff as well, I'd advise you take it into a tech. If the fuse is blowing even with new valves, then that's because something else is wrong. it should just be (hopefully) a resistor or two, which should be easy to sort out.

 

[7 Dying Trees]

Do they monitor the tubes in standby mode?

in standby the only power going to the tubes is the heaters, your problem is when the HT voltage goes across the power/pre section and something is causing a lot of power to get sucked through (faulty component or a short).

Whatever it is, unless you really know your stuff and have worked on high voltage amps before is to take it to a tech.

 

[Moloch]

I see, thanks for the help.