Question about Sony STR-DB790 Receiver

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(VFD)isplay of my Sony STR-DB790 won't light up when turned on.

When I turn on my receiver the display won't light up and stays black like when it's off. This problem also occurred about a year ago but one day the display just went on when I turned the receiver on. After that I had no problems with it anymore ..untill this evening. But this time I don't want to wait it out, I would like to know what I can do about it myself.

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4 Suggested Answers

jerryg50
  • 1667 Answers

SOURCE: str-db790

The output stage on one channel may be damaged or there may be a blown fuse for the side with no sound. If a fuse is blown, this is an indication of a fault condition.

Also, before assuming a failure, make sure that all the controls or setups are in their proper settings.


Jerry G.

Posted on Apr 12, 2008

marsrover
  • 682 Answers

SOURCE: Sony STr-DB790 problem

please check your speakers cable for internal short circuit-disconnect all speaker cables and test if everything is fine continue to connect speakers one by one until you find the bad one when you find it change its cable first and test then the speaker itself.if the problem still after disconnection ask for help from good service center.

Posted on Jul 19, 2008

ginko
  • 19396 Answers

SOURCE: Sony STR-D665

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.

Posted on May 29, 2009

dunnbiker
  • 8546 Answers

SOURCE: cant get sound through my

Assign the optical input IAW the manual.

Posted on Aug 18, 2011

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Sony STr-DB790 problem


please check your speakers cable for internal short circuit-disconnect all speaker cables and test if everything is fine continue to connect speakers one by one until you find the bad one when you find it change its cable first and test then the speaker itself.if the problem still after disconnection ask for help from good service center.

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You need to go to SETTINGS, Sound Settings, then choose the correct output for your needs there.

If you have any more questions, just reply to this thread.

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Str-db790


The output stage on one channel may be damaged or there may be a blown fuse for the side with no sound. If a fuse is blown, this is an indication of a fault condition.

Also, before assuming a failure, make sure that all the controls or setups are in their proper settings.


Jerry G.

Oct 12, 2007 | Sony STR-DB790 Receiver

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