Question about Sony STR-DE705 Receiver

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Display not lighting up

The display panel on my Sony STR-DE705 will not light up. Could this be a blown fuse?

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I have the same problemwith mine. the protector sign is on- I do not know why- and do not know what to do about it. Let meknow if you do or if you get assistance and I will do the same. My e-mail address is

Posted on Feb 28, 2008

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SOURCE: sony str-de845 Powers up, relay clicks, fuses BLOW!

Buy a slow blow fuse from Radio Shack

Posted on Mar 05, 2009

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SOURCE: sony str-de525 system "protector" problem

You've blown it. It recognizes a potentally harmful situation and goes into protect mode.

Posted on Mar 15, 2009

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My Sony receiver amplifier model number Str-de315 has just stopped working clicks on 2 lights come on but nothing else k

no front panel display means one of twot hings: either the power transformer is blown, or the main power fuse. If the main power fuse is blown, then there are likely to be shorted output transistors that will need to be replaced.

May 03, 2014 | Audio & Video Receivers

1 Answer

Digital light display faulty (can not read information on display)

There are two things that you can check before you really need to start and take it apart
1-Perfrom a hard reset. To do this, turn on the receiver than physically disconnect the power to it for about 15 seconds. Re-connect and test
2-Check the back to see if there are any fuses. If so see if any are blown.
If these solutions do not help, than it may be necessary to take it in for repair.
Good Luck

Jan 07, 2011 | Sony STR-DB798 Receiver

1 Answer

The word protector is displayed

If protect is coming up on the display, it means the system is detecting a short somewhere on one of the speakers and so is turning the amp off to avoid damage.
Check all the connections at the back of the amp to ensure they are not shorting, and at the back of each speaker, if nothing is found there, check each wire for damage (like squashed or rodent damage).

Mar 06, 2010 | Sony STR-DE705 Receiver

1 Answer

Soon as i turn power on my sony receiver goes straight to protection mode can i disconect the fuse to reset it

Resetting probably won't fix it, Sounds like it needs output transistors and some resistors and/or fuses

Nov 28, 2009 | Sony STR-DE705 Receiver

2 Answers

Sony str-de525 system "protector" problem

You've blown it. It recognizes a potentally harmful situation and goes into protect mode.

Mar 15, 2009 | Sony STR-DE935

1 Answer

Can you hepwith my sony LCD Problem?

It could only need some soldering of the display itself. If you want to try it your self.
remove the top cover (you may need to remove the front panel also)
  1. inspect the twenty or so pins of the fl display tube especially the end ones (resolder if bad).
  2. if they all look good check for DC voltage on the end pins (20 to 30 volts)
be careful not to touch the transformer pins when unit is pluged in and the cover is off!

Mar 07, 2009 | Sony STR-DE485 Receiver

1 Answer


This means that the unit detected a problem and shut itself down to prevent further damage. The normal cuase of this is a defective transistor in the final amplifier stage. Figure on $15-$35 for parts plus the local labor rate for the total repair.


Aug 19, 2008 | Sony STR-DE705 Receiver

1 Answer

No display

it is a bad fuse or the i.c. chip is bad

Jan 02, 2008 | Sony STR-GA8ES Receiver

2 Answers


Protector appears on the screen

Nov 22, 2007 | Sony STR-DE715 Receiver

1 Answer

Sony STR-DE705 question

yes you can use a step down converter,but remember to use a higher rating converter.if your receiver need 100w ( or 1A )then you need a converter at least give 150w ( or 2A ).

Aug 06, 2007 | Sony STR-DE705 Receiver

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