Question about Sony TA-N9000ES 5-Channel Amplifier

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No sound Sony Stereo Model HCD G5500 will turn on but no sound. Speakers work-I tested on other unit. I have back off-nothing appears to be disconnected or melted. What else can I look for?

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When the amplifier will turn on but not produce any sound that is usually an indication of either the high voltage power supply inside the amplifier is not working, or the amplifier IC or amplifier circuit is damaged. It is not something that can be repaired unless you have experience working on electronics.

Posted on Jan 04, 2009

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Posted on Jan 02, 2017

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No volume on all left side speakers


Determining the Cause of the Problem Let's assume our system has a head unit, a crossover, a two channel amplifier and two door speakers with only the right speaker working (the left speaker is not working). If the door speakers are behind the door panels then we want to make sure the speaker is the problem before removing the panel. We'll work backwards starting with the amplifier and ending at the head unit. Testing for a Speaker Problem With the vehicle and the stereo turned off disconnect the speaker wires for both the left and right speakers at the amplifier. Now connect the left speaker to the right amplifier output (which we know works). Turn on the stereo system and make sure the balance is set to the middle position.If the speaker still doesn't work then the problem is somewhere between the amplifier and the speaker Testing for an Amplifier Problem Now we'll need to see if the amplifier channel is bad. Put the left speaker back on the left amplifier channel and the right speaker on the right amplifier channel. This returns the speaker wiring to its original configuration. Again, with the vehicle and stereo off unplug the RCA cables from the amplifier's input and switch them so the left cable is in the right input and vice versa. Turn on the stereo system. Testing for an RCA Cable Problem For any intermediate components between the amplifier and the head unit follow these steps for each one. We only have a crossover so we'll just do this once. Begin by testing the RCA cables between the intermediate component and the amplifier. Unplug both RCA cables from the intermediate component's output. Now plug the working channel's RCA cable into the non-working side of the crossover. In our case the working channel is the right so plug the right RCA cable from the amplifier into the left side of the crossover. Turn on the stereo system.
If the right channel continues to work then you know the problem is in the RCA cables between the amp and the crossover. esting for a Crossover or Equalizer Problem At the input of the intermediate component (in our case the crossover) flip the RCA cables around (left to right input and vice versa). Turn on the stereo system.
If the right channel continues to work and the left channel continues to not work then you know the problem is in the intermediate component. Replace or repair this component.
If the problem is now in the right speaker and the left speaker works then the problem lies before the crossover. Turn off the stereo system and return the RCA cables to their normal places.
Testing for a Head Unit or RCA Cable Problem Pull out the head unit from the dash so you can access the RCA cables. Unplug both RCA cables from the head unit. Do not disconnect any other wiring. Plug the right RCA cable into the left channel of the head unit. Turn on the stereo system.

Sep 29, 2016 | Cars & Trucks

2 Answers

Sony hcd-ec99i i have no sound from the speakers at all. I am not getting the protect message. please help


Check the simple stuff first

Is it muted?

Is the source selected sending signal (radio staion broadcasting, cd playing, ipod all the way ect)

Try doing some basic troubleshooting like,

see if all sources available yield the same result (TV, Radio, CD, Ipod, Aux jack)

When you turn the volume all the way up, do you hear an audible hiss from the speakers?(or use a test tone) If so, your amp is working and the problem is, your unit is not sending any signal to it.

If possible hook up your speakers to another system to rule them out, however I doubt that is your problem.

Here is sony's recommendation and a review video

Let me know what you get

SONY eSupport How to troubleshoot if there is no sound or intermittent...



Feb 03, 2014 | Audio Players & Recorders

1 Answer

Sony hcd vx55


Hello. I downloaded the manual for the Sony system with the model number MHC-VX55. It seems that the part you are asking about is not a speaker system, but a preamplifie/power amplifier with integrated inputs from CD/Video, tape and tuner. The speakers that connect to the HCD-VX55 are a three way passive design with a nominal impedance of 6 ohms and model number SS-VX55. To answer your question I will assume that you meant you would like to connect the MHC-VX55 system to your computer for playing back audio tracks from your computer. Yes, you can do this. Your Sony system is equipped with an input labelled MD/Video (audio) With a sensitivity of 450 mV, this will (not ideally) the output from your computer headphone jack (if a laptop) or, even better you may have a desktop with an audio output at line level. You will need a simple audio connector with a 3.5 mm stereo plug on each end (very common and readily available for a few dollars. Be careful when setting up that you have your source turned down low and the input on your Sony machine about half way. You will find the sweet settings so that you get good sound without distortion. If you get distortion your source level is too high. Hope this helps. Cheers, Don.

Dec 13, 2013 | Audio Players & Recorders

1 Answer

My stereo sysytem is a mini stereo: serial number 10200055. It currently says "protect", what is this and how do we return our system to normal operations?


Hi there,

When the word PROTECT appears on this display, this means the unit has detected a critical fault which could potentially cause harm to your stereo system.

The most common cause is a short circuit somewhere - something even as simple as loose speaker wiring could cause a short, triggering the Protect message.

You will need to determine if there is a possible short somewhere, so I recommend you start by firstly turning power OFF, disconnecting all speaker wires, then turn unit back ON.

Operate the stereo (without speakers) and turn volume up:
  • If Protect message appears when turning volume up, then stereo unit itself has an internal fault
  • If no Protect message appears, then suspect the speakers may be causing the issue.
  • Reduce volume and turn unit OFF
Re-connect speakers (ensure the connections are secure), turn unit ON:
  • If turning volume up triggers the Protect message again, there is an issue with the speakers or connections

Hope this helps.....

Sep 04, 2011 | Kenwood Audio Players & Recorders

1 Answer

I have a Sony HCD-451 home stereo. The sound goes in and out every few seconds and there is a clicking sound when it does. I just moved and when I hooked it up after the move it started behaving this way....


Diagnose first. Surgery last.

A big clue is that it started after a move.

Recheck your speaker connections for loose strands that might be touching each other.

If it still clicks and loses sound, disconnect all the speakers and see how that works out. If it's stable (no clicking) add speakers unr\till the problem reappears. Then isolate which one it is/was.

Jan 05, 2011 | Sony Audio Players & Recorders

1 Answer

My left speaker to my Sony HCD-GX450 stereo is


Make sure that Loudness switch is turned off & bass is not boasted up. Most cars have small cheap speakers that can't handle the bass. also its better to cut the low frequency from the woofer using a passive or active crossover. Most nowadays head units have got some sort of built in crossover. Refer to your head unit manual.

Sep 20, 2009 | Audio Players & Recorders

1 Answer

How do i fix tis problem


First, disconnect all your speakers from the back of the unit. Then turn it back on, if it does not go into protection, turn it off and examine your speaker wires, look for frays that could touch the other binding post (most common problem). Then re connect speakers one by one; testing after each connection. If you get them all re connected and it still plays, you've solved the problem. If you get to a particular speaker and it cuts off, check the wire, then check the speaker. If theres nothing plainly visible, swap the speaker for one that is working and try again. If it still shorts, try a new wire. Beyond that, if it's still shorting, theres a problem internally with the receiver and it need to go to service. If you have all speakers disconnected and it still goes into protection, there is nothing you can do but get it serviced. There are no internal protection "fuses" Hope this helps

Jun 30, 2009 | Sony STR-DE597 Receiver

1 Answer

Error code - protector


Try disconnecting all the speakers from the back and turn the unit back on. If the "protector" display goes away, turn the unit back off and reconnect one speaker. Turn it back on and check for "protector". Repeat.

If you find that one of the speakers causes "protector" to appear, you either have a bad speaker cable or bad speaker. Try swapping each of those out to see what happens.

Apr 20, 2009 | Sony STR-DA90ESG

1 Answer

No sound


Check if there got fuses for the speaker and check if them are good

Dec 30, 2008 | Sony Multi-System Mini Hi-Fi system /DVD...

1 Answer

Sony stereo model HCD G5500 will turn on but no sound comes from speakers. I tested speakers on other unit and they work. I have the back off. Nothing appears to be melted or disconnected. What else can I...


Check fuse in plug check onboard fuses if all good look for black or blue or ornge little rectangular boxes(relays) should click if not then protection problem and needs to be serviced

Dec 30, 2008 | Sony TA-N9000ES 5-Channel Amplifier

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