When a receiver does this, it is know as the "protect mode". This keeps the receiver from causing more damage to the components in it, by shutting it off when it detects an abnormal amount of voltage or current.
If you had to replace the fuses, it is most likely that you have a blown channel in the receiver.
You put 8 amp fuses in, so I hope that the fuses that blew were 8 amps as well. If you put fuses in that are higher rated in amps than the ones that blew, you will most likely cause more damage to the unit than need be. If the fuses keep blowing, please stop putting new fuses in again until the unit is repaired. Every time a fuse blows, it is because of too much current is going thru the unit. Having too much current is a very bad thing for electronics, it causes components to short out and sometimes even catch fire if the fuse is higher rated than it is supposed to be.
To find out just what parts will need to be replaced, you need a multimeter and then you will need soldering tools to remove the bad parts and put the new ones in.
When an amplifier channel gets blown, there are normally around 5 to 10 parts that will need to be replaced. If you do not replace every single bad part in the channel that has blown, you will most times blow up all the new parts that you just put in.
If you have no experience with electronics, you really should take it in to a service center for repair. If you are willing to try it yourself, let me know and I will guide you thru the troubleshooting steps to help you identify all the faulty components.
Onkyo is very well made equipment and is worth getting fixed.
A blown channel can normally be repaired for around $100 to $150, just depending on the shops rates and the extent of the damage.
Let me know if you need more help.
Dave
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