Question about Koss KS2503 System

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The sound stopped working on my koss KS2503. Yesterday everything worked perfectly fine. Today there is no sound. Everything else seems to work. I checked all the connections and have had no success. Is there a reset code or anything for this system?

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Unplugg your tuner from the AC wall outlet then check the setting on the tuner do not try to watch and listen to the tv only try to listen to the radio or a CD and select the right option on the tuner to do so. If you have sound on any of the functions....radio or CD/MP3 then the problem lies on the setting not correct for the TV/VCR/DVD mode.

Posted on Sep 12, 2009

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Posted on Jan 02, 2017

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My dvd player koss ks2503 stopped working ,i changed the fuse but it still not working


Check the capacitors in the power supply and replace the ones that are large and/or leaking. They usually look puffed up on the top. Also check the solder connections on the power supply. Very common with these "KOSS" units.

Jul 18, 2011 | Koss KD250 DVD Player

1 Answer

Won't turn on


If the output module(s) has/have not failed (you need to know a bit to check this), then the power supply problem is probably traceable to a failed capacitor that caused the further failure of a switching transistor.
Locating this problem requires some electronic knowledge and at least a (digital) multimeter.

About the only thing you can do by eye is look for cans, normally mounted vertically on the board, mostly with the aluminum of the case visible at the top and shrink-wrapped sides that have values printed on them.
If you see any that have cracked tops or deposits on the board nearby, these may have caused the problem but the major component that is causing the fuse to blow is/are diodes or switching transistors on the AC side or shorted diodes on the DC side.

Because the failure might be related to bad capacitors, not having any way to check them pretty much precludes do-it-yourself repairs.

Replacing a blown fuse is sensible; replacing it twice is futile.

Jun 14, 2008 | Koss KS2503 System

1 Answer

Every thing works but the sound


I have the same problem, dvd works but no sound only a buzz sound.Did I blow something

Apr 29, 2008 | Koss KS2503 System

1 Answer

Koss KS2503 will not come on


You are better off buying a portable; u can get a magnovox DVD player for under $40 with DivX and connect it to the unit, and use it that way. www.kcwholeseller.com

Jan 02, 2008 | Koss KS2503 System

1 Answer

KOSS KS2503 CODE


Don't need to hack it,you could call Koss??

Aug 14, 2007 | Koss KS2503 System

1 Answer

Problems with headset and hearing anything


I am having the exact same problem today and I paired mine with a Treo Palm 700 on yesterday and it worked perfectly then. UGH!

Jul 12, 2007 | Motorola Mobility H700 Wireless Headset

1 Answer

Woke up turned the system on and have no sound


i have no idea but it sounds like toast to me

Jan 02, 2007 | Koss KS2503 System

2 Answers

No Power to the DVD player


Check your fuse. You probable blew it. Same thing happened to me months ago.

Aug 13, 2006 | Koss KS2503 System

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