Ampeg SVT7 Pro will not turn on

[Thepogo]

I have one that's about 3 years old. Yesterday it started going out at a gig and within 1 minute just shut off. Now it will not power up.
Any ideas why?

[Jazz P Bass]

Unless you are really, really good at fixing these amps, I would recommend that you take it to a competent tech.

The power supply is a 'switch mode' design.

And the output is a 'Class D" design.

Both can be hairy to repair on a good day.