Screen does not work.

Did u check your wall socket to see if it has power , plug some other unit intointo the socket that u know worts like a light if it does not work check the fuse box for a trped breaker

If your portable DVD player work with the AC power adapter in the wall outlet.100% the litium battery doesn't take any more holding charges.The litium battery should last u about 2 years with minium usages 2-3 hours a day.But that the DVD player and the litium battery must keep in very well conditon and wheather wise.Not in the heat or cold and the humitnity well shorten the lituim battey life very quickly and also could damages the portable DVD player too dosen't matter how much u used it.Tries webites like Amazon.com,Partstore.com,Ebay.com to buy a new litium battery or a compatible one.

This is likely caused by a defective battery pack.

Plugged Dvd player into wall and it will not come On indicates that power supply board in dvd player is not working/ become defective.
If unit is under warranty, call Sony to get replacement or buy new dvd player because spare parts are not available for this model, it is sort of disposable dvd player.
Thanks.

Hi, yes it should. Have the AC adaptor tested for DC out, you might need to replace it. Most of these prtable units have a rechargeable battery pack, you might want to have it checked out also, because it might be interfering with the AC option as well.

Change the Battery.
jon

Dear friend,
Pls clean ur dvd palyer lense or replace ur lense

press and hold stop button more than 5 sec and ur player will be unlock

I have noticed with other devices in the car plugged up to a cigarette lighter, it will work while the car is running and once it is turned off, but once the car is started again, I lose power. Evidentally this is an issue with car electrical systems either resetting or surging so it isn't anything wrong with your dvd player. It would be best if you could unplug the player and let it run on battery just before the car is started and then plug it back it once the car is running. I hope this helps.

the battery is dead. that happened to me and i had 3 choices: 1)buy a new dvd player 2)buy a new recharable battery or 3)keep the portable plugged to the wall while i watch movies. i chose number 3 because i usually just use it at places plugs are available. but yeah, the battery is dead.