I have a Koss DVD player Model: KS4110. I have only used it one time. Ut worked perfectly. I hooked up a differnt TV and had this cheap disc I tried playing. It said "bad disc" so I assumed the disc was bad. I threw it out and three monthes later I rented a DVD from the video store that I know works and the screen on my DVD still says "bad disc" Can you tell me what I can do to correct this?
Re: dvd player won't play-shows "bad disc" on screen
It did the same thing to me, it started to work again. it may be a memory issue. my koss player started to work again after it was unplugged for a while. Its something to do with the dvd disc not the player. if i find out , i will post again.
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how long have you been using this player? I suspect the laser (lens) of
the player. I think the laser (lens) is weak that's why it cannot read
data/files on DVD discs.
To confirm if actually its a laser problem, insert an Audio CD into the
player and see if will play. If it plays, then obviously, your laser
(lens) is weak. But if it doesn't play Audio CD, then it might still be
the laser (lens) or a mechanism problem.
Get a lens cleaner, use it to clean the lens. If that doesn't solve the
problem, get a screw driver, open the player's cover so that you can
gain access to the lens, use a cotton board to clean the surface of the
lens. This should clean dust or dirt that might be on the lens.
If non of the above solves the problem, then know that you need to replace the laser to a brand new one.
To replace the lens, remove the bad laser, use it as a sample to get
exactly the same type and do the replacement. Note that replacing a
laser (lens) needs a professional touch, so if you cannot replace the
laser, get it to a repairman to fix it for you.
Once this us done, your player will play all DVD discs again.
I had the same problem and it took an act of Congress to solve it. However, I can tell you that through much more hard work and time than it should have taken I discovered the infrared code for my "One-For-All" remote model URC-4021B00 is--0651. Not sure if it's the same for any other remote control models, but give it a shot.
Yes they are surface mounted componets and without a schematic and an ocilliscope I think it will be near impossible to find the trouble if the problem is an IC. If you have access to a scope try tracing the video signal from the RCA output jacks and see where you see it come up. Good Luck