Yes it has a fuse inside it’s a 500 ma
If you still got no power you need to check that the transformer is working there is a thermal fuse in that too.
If you got power at the transformer and the fuse is ok next check that the two voltage regs 7805 for pwr input then 5 volts
If not then I go for the main reg on the heat sink TDA7375A
Hope this helps please let the sight know if you get a result
Robert
April 2010