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Re: protect flashing on screen
That is the system telling you it jhas shut down the amplifier circuit to protect itself from damage.
Check the speaker wires both at the back of the unit and at each of the speakers to see if any of them have come out or are touching anything they shouldn't be.
You may also have a blown speaker sending a short back down the line. So if you find no wires out of place, then disconnect each speaker and turn the unit off and on as you go until the message is not showing and sound is restored.
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These blinks [flashes] are fault indication (Error Codes). From the number of blinks occur at one time switch ON, you can get an idea about the faulty circuit section inside it. This will make repair easy. These are called blinking codes. Make sure about the exact number of blinking of the standby/power LED, by switching On & OFF the set, for at least two times. Count it carefully. If you wish to get some details, check the site linked here. It has details about blinking codes, and fault locating procedure, to many popular brand TVs and other devices. http://electronicshelponline.blogspot.com/ http://electro-medical.blogspot.com/
Your unit has a condition known as DC Offset, meaning a bad amplifier. For more information, or to inquire about a repair , please visit my website at audioserviceclinic.com. You may contact me directly through the website. Thank you.
this is a protection circuit. When bypass mode then it means that something in the power supply module has failed and the unit then goes into protection mode to protect the board components. Your surround sound need service from a qualified tech. No other remedy.
Sony has protection in these receivers for two main reasons.
1 - Checking for DC voltages on the outputs to speakers. Not your particular problem.
2 - Excessive current being drawn from receiver on one or more of the speakers.
Number 2 should be your starting point in finding a solution. Put the volume level on Medium - 35 to 40 on the front panel. Now listen to all you speakers in turn. Any scratching noise will indicate a defective speaker. Remove this speaker from the receiver output and check again if the set goes into protection on high volume.
If you could not find any strange noises on the speakers, remove them one by one and test the set on high volume.
Never - attempt to disengage the protection on this amplifier. The only times we have found the amplifier to be defective with this protection error, it has done so no matter the volume level. Therefore I believe your problem to be a speaker or speakers.
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.
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.