How many times have you tried to power it up?
If just once.. try, try again. Caps need a bit of 'juicing' before they work right after a long period on none use. And the amp is shutting down because it's getting bad internal readings... If you try a few more times.. it might just realize it is OK and stay turned on. IMO. What have you got to loose? I would say turn it on if it shuts down again.. unplug it and try the next day...
If just once.. try, try again. Caps need a bit of 'juicing' before they work right after a long period on none use. And the amp is shutting down because it's getting bad internal readings... If you try a few more times.. it might just realize it is OK and stay turned on. IMO. What have you got to loose? I would say turn it on if it shuts down again.. unplug it and try the next day...

