My Sony STR-KS2300 home theatre receiver will not power on. Can you help solving the problem.

Check your power supplies by measuring or disconnecting. You probably have a load of some type either on an output channel or you may have shorted caps loading one of your power supplies. You can't guess your way through it.

standby supply issues. weak 5 volt or currupted microprocessor. does the owner manual have any reset procedures (soft reset) .call sony customer service to check.

This receiver does not support audio via HDMI. You need to connect BD player via spdif cable. Use optical or coax depending on what does the BD player support - receiver supports both.

it is so good to hear from you friend. the replacement remote that you need is on newremotecontrol.com. the number that you are looking for is 148058621. this remote cost 24.95. thank you for writing and please rate my solution.

A common cause are failures in the amplifier output stage, the drivers, and some of the support components. You will have to send the unit out for service.

Jerry G.

Protect mode will kicking whenever a fault is detected.

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.

Did you have any Rca Cables running to a Tv or anything by accident cuz it could run thru those, Lighting is a powerfull substance, if it hit the house then it could of ran into the cable to the tv an went out, thats wierd this is the 1st time ever hearing this, try looking in side to see any burn markings, an take a wiff cuz you can tell if somthings fried by the smell of it, if it is then its most likly dead

Protet mode is a special diagnostic mode that starts when a fault is detected.

When in protection mode the unit is prevented from starting by protection circuit, so to prevent further damage.

Check the speakers and speakers wiring, a contact in speaker wires, or faulty speakers can send the unit in protection.

Try unplugging power cable for one hour or so. then connect cable back and see if you get rid of protect state. Sometimes accumulation of electrostatic charges inside circuit capacitors can kick in protect mode. In that case unplugging the unit from main for some times can get rid of electrostatic charges, and reset circuits by draining power completely.
If that was the problem, you will not get Protect when plugging back power cable.

If you do all the above and still get Protect, then there is a real fault.

In that case the unit may be disassembled and tested to find the fault.

If that is the case I suggest contacting the manufacturer at the number listed on the owners manual, or asking a quote on repair to a local technician.

confirm good wiring condition of celling speakers and disconnect it and connect it again-keep good ventilation around.