Sony home theater system started blinking protect

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How have.you connected the TV to the surround unit ?

Protect on a sony usually means there is a problem in the amp section. On that model, it would probably need to have the entire amp pcb replaced.

Yes you can. If you have more than 1 HDMI sources and your old system only has 1 HDMI in, you may want to invest in an HDMI switch. They are inexpensive (under $20 on Amazon) and let you choose 4 HDMI sources to feed your system. The audio is embedded in HDMI and you may have to select the choices (surround versus stereo) when you play the disc.

the protect means a circuit overload check that you dont have any wires for your speakers touching or backwardly installed if those are all fine you may have blown a fuse inside the receiver.

Check speaker connections and wires and make sure all wires are plugged properly. If problem still exist then unplug speaker one=by-one and test home theater to determine what speaker is causing Protect error.

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.

Power protect is an error message that some thing is wrong in your sound system and requires qualified tech.

Normally that error message appears when unit got problem in amplifier output section, either it is speaker problem or some output chip is fried.

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.

i have had samsung surround sound for couple months, only been used once, now when i power up, protect is displayed on front and then powers down, also, when it does work, sound is extremely low compared to when i first used it.