Samsung dvd home cinema system ht-ds110 not playing dvds

The most common reason is either a dirty or bad Optical Pickup unit in the player which is what reads the disc, and you will get no disc, cannot read disc etc.

Hi. There is a change in focus by the laser for a dual layer DVD - the laseer has to read through a semi-transmissive layer for that extra information too.

Cleaning your laser lens with a cleaning disc kit may bring it bck to life especially if you smoke... else could be time for a new laser(s)
https://www.bandcds.co.uk/faqs/dual-layer-dvds

i m dvd home cinema sound system ht q20 every thing is ok but soung is not good plz hlep me

You could try cleaning the drive with a dvd cleaner disk and also a can of compressed air to blow into the drawer. It may just be dirty. Good luck! I hope this helps you.

Is the disc just a regular disc, not HD or blu ray?
Is the disc a region 1 coded disc?

If it is, the unit should play it fine.

check the dust content on in the m,achine then check your settings to make sure its adjust accordingly

wrong reganal code most likely there are sites were you can unlock your dvd player (hack it) so it will play disks from anyware

The Lense is dirty just open your dvd and get an eye pad, deep it in methylated spirit and wipe on the lense or just run a lense cleaner and put the dvd it should be able to play.

TThe player does not play this type of dvd disk! only pre-recorded movies and CDs Try hooking Up a player that plays DVD+ and DVD- disks!Hope I was of help!
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Turn on the HT with no DVD. Press the following buttons on the remote: ENTER 8, 4, 2, 6, 9 ENTER 
It will turn off. When turned again on it is a region free HT.