Question about Koss KS2503 System

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DVD does not work..

When I press "standby" and "start", I get a "Message 04" in the display area. It immediately goes back to "standby". It goes off so quickly that it keeps the loading door from opening and the tray selector from working. Do you know what "Message 04" is? I didn't know if my dvd player can be repaired or if I should just purchase another one. Thanks for any help or advise. Cindy

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SOURCE: Koss KS2503 "MSG 04" problem

I had this MSG 04 problem. Opened the player up. Messed around. Figured out that the 5-disc tray was hanging up a little during the initialization. The issue is that the tray screws into and rotates around a stand-up beam. On the underside of the tray are gear teeth which are spun by a gear on the main unit underneath. The real culprit is the stand-up beam in the very middle. It is too long. The fix is to first try just tightening the middle black screw holding the tray onto the stand-up beam. If this tightens and MSG 04 goes away, you're done. If it does not tighten at all or much at all, then remove the screw (actually a bolt) and using a razor or sharp blade, scrape the top 1/4 millimeter off the stand-up beam. Apply some grease around the beam and on top. Note, you may have to remove the tray to do all this. If so, that is the most tricky part. Carefully lift on the tray on the front side as you rotate it. Try to free a disc circle edge over the top of the front DVD cover and free the tray. To re-set the tray, put it on the stand up beam with the front side of the tray slanted up and slowly rotate while setting it in and down. After re-seating the tray, screw the bolt down but do not tighten all the way. Tighten it enough to allow rotation and enough to rid the msg 04 problem. I shaved my stand-up beam and have never seen a MSG 04 since.

Posted on Jul 16, 2006

  • 14 Answers

SOURCE: I have a Koss KS4102 Non working dvd

yes it does

Posted on Dec 05, 2007

  • 38 Answers

SOURCE: cd tray won't open

It is Koss brand,you shouldn't expect much from it. You could have an A/V repair guy to fix it for you or buy a better brand like panasonic,denon, or even samsung.

Posted on Feb 04, 2008

  • 1 Answer

SOURCE: DVD Tray stock closed Koss ks 2503

See if you can acquire the software upgrade that Koss engineers devised to solve the problem, I did have one(the upgrade) but misplaced the disc, if you manage to obtain it please e-mail me.
Art.

Posted on Jun 08, 2008

SOURCE: Door keeps opening and closing on the DVD player.

Does the dvd player gets a belt downside the tray change it

Posted on Aug 08, 2009

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