If the DVD player is less than 6 months old, take it back to where you bought it from as you are entitled to a free exchange or refund because it is faulty. This applies to all electrical items. If it's older than that see if it is covered by the warranty. (Or check the shop's policy as they may accept faulty items back for a longer period - unlikely though) Usually in the back of the manual there is a troubleshooting section too, or the website of the make of DVD player (sony etc) could help.