In my opinion, this is no way to improve it significantly. I think you should have thought of it more properly. Now there are many tips which will offer HelpToChoose budget AV receivers. There are many good av recievers of them but you should read the information about every one.
It definitely needs repairs
Check the cooling fan
SOURCE: Onkyo tx-sr800 PROTECT mode
Hold video1 and press speakers A button, it will say "clear" If the message protect appears again, then its service time.
SOURCE: code for sony receiver model str d565 protect mode
If you need support you can log into:
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SOURCE: Protect mode shuts down the receiver
If this happens only when connecting the receiver, chech the receiver cable. If the cable is fine, receiver connector at the back of receiver is faulty.
Protect mode will kick in whenever a fault is detected.
You get the unit not powering up, and sometimes you hear a clicking
noise, that is the protection switch that keeps shutting down the unit.
Causes that can start protect mode are:
Electrostatic harges on internal circuits.
Leave the unit unplugged for power for one hour or so, this will allow discharge.
Bad speaker wiring.
Check speaker wiring, try unplugging and plugging back, or start after removing one speaker at the time.
Internal fault.
Internal
fault is the natural cause for protect mode. If all the above did not
work, then the problem is a blown component or an internal fault. In
this case the unit must be taken apart , tested and repaired by an
experienced person.
If the unit is less than one year old, or if you
want to get service, call Sony at the phone number listed on the
product documentation.
Regards.
SOURCE: How do I reset from the amp protect mode Onkyo receiver TX-SR600?
How do I reset my amp / receiver from protect mode ?
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