Question about Sony MHC-GX9900 Shelf System

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Im having problems with my Sony MHC-GX9900, when i turn it on it it shuts down after a second or so, what can i do to fix it?

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Generally speaking, an amp protects itself from heat, shorts, overloads and operator exuberance by refusing to turn on or stay on.


Overloads can be from excessive periods of high output or marginally low impedance loading by the speakers; and shorts would be wiring issues or a speaker blowing up.


You should be able to feel if it's hot. WHY is it overheating? Make sure it has sufficient ventilation on all sides and that vent holes are not blocked by dust balls. Ensure the fan (if equipped) is running as designed (some only operate on demand). Clean dust and debris from it.


If the amp comes back on after cooling, you're lucky. They only have so many self-protection cycles in their lives so continuously resetting or cycling their power without addressing the cause can do more harm than good.


If it protects immediately on a cool power up you should disconnect the speaker connections and try it 'naked'. If it comes up then diagnose which lead(s) are shorted. If it does not come up the problem is internal and should be left to an experienced and competent hands-on tech.

Posted on Apr 01, 2011

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I connected an aux to it i dont know how to like put it in aux mode i cant find it


The MHC-GX9900 has several audio input ports (RCA L/R) on the back of the unit. Press the TV or Video/MD buttons on the left side of the amplifier part of the unit. Alternatively, these are accessed in turn by repeatedly pressing the Function button on the remote. The TV input is the top one of the pair of inputs. The front ports are audio out to headphones and a pair of microphone in ports.

I hope this helps.

Cindy Wells

Nov 12, 2015 | Sony MHC-GX9900 Shelf System

1 Answer

Sony stereo mhc-gx9900 audio doesnt come out of speaker thou all lights show its playing


There is a intermittent problem on the main board, or the headphone jack is dirty or worn contacts, buy electronic cleaner, spray into headphone jack or earphone jack, slide headphone jack in and out as you spray the contact cleaner, do this several times in a attempt to restore audio.

Apr 06, 2012 | Sony MHC-GX9900 Shelf System

1 Answer

No sound


The problem is the audio output ic it has become defective and replacement only option, check speaker wiring to be sure.

Mar 23, 2012 | Sony MHC-GX9900 Shelf System

1 Answer

Where is the aux cable in a sony MHC-GX9900


Register and download the manual for free at retrevo.com

http://www.retrevo.com/support/Sony-MHC-GX9900-manual/id/268ag314/t/2/

See Page 40.

"AUX" is just a generic label for any Line Level Input. On this unit that would be Video/MD (Audio In) or TV (Audio In).

Feb 27, 2011 | Sony MHC-GX9900 Shelf System

1 Answer

My mhc-gx9900 is on speakers b how do i get back on speakers a


Unplug it then replug it in... then power on the unit; then press the "stop", "enter" and the "power" buttons all at once and it will restart in factory default... should fix it ??
4_20_2016_1_35_06_am.jpg

Feb 13, 2011 | Sony MHC-GX9900 Shelf System

1 Answer

Im trying to set up my speakers for the sony mhcgx9900 been try to find a manual so i keep trying by hitting the dirrection button


Hi,
Click Sony Support to download instruction manual copy that has all necessary info about sound system functions.
Hope this info will help you in setting up.
Thanks.

Nov 26, 2009 | Sony MHC-GX9900 Shelf System

1 Answer

SONY MHC GX99


power trasformer..it runs about 107 /wo shipping

Jul 01, 2008 | Sony MHC-GX9900 Shelf System

1 Answer

The System shuts off automatically


System detects power rail irragularities.E.g +5ve the fault is in power supply section.

Dec 17, 2007 | Sony MHC-GX9900 Shelf System

3 Answers

Sony MHC-GX9900 Shelf System


i have the same problem with the blinking light this problem is due alot to over heating be careful your fan is not burned up or is not being blocked it is a protect mode activation to prevent overheating

Jul 04, 2007 | Sony MHC-GX9900 Shelf System

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