|No user replacable fuses. Have the power supply checked or purchase a good power supply tester and do it yourself. If you have a known good power supply to test with, swap them out. Be carefull as bad parts can destroy good parts. It may be the mainboard that has failed.|
That is the starting place. - might check out the power switch with a VOM to verify it is working properly since you are right there.
If you need instructions on how to do this - get assistance from a local shop.