20 Most Recent Sony CDX-GT300 CD Player Questions & Answers


you might have a button stuck, try gently pulling the function button out a little bit. i used a sheet rock knife razor blade and was able to release it but after pressing the function button again it started all over again. good luck.

Sony CDX-GT300... | Answered on Apr 29, 2017


maybe bad ground wire behind radio cheers

Sony CDX-GT300... | Answered on May 12, 2014


Just connect together the solid blue wire on the main harness to the radio with the blue/striped wire. The blue wire is for the power antenna and the blue striped is for the remote amp. but if not connected together only the fm/am has outputs to the line output RCA jacks. I learned this through Sony's tech line and it works perfectly now.

Sony CDX-GT300... | Answered on Nov 15, 2013


If you punch up ur model number into google search you will find the diagrams u need.

Sony CDX-GT300... | Answered on Sep 02, 2013


check the sub works with known good signal from different source. if that works and all settings are double checked then you might try to reset the 300 series to factory reset. try to unplug from the 110 outlet then hold the on button down while plugging it back in this should re iniatalize the unit and if it still doesn't work you may have a hardware problem

Sony CDX-GT300... | Answered on Jun 20, 2011

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