Disc tray won't stay closed.

1) Turn on the player with no disc in the tray.
2) Open then close the tray, wait to see the No-Disc Message
in the top Left Corner.
3) Now press the REPEAT button on the remote, followed by a
five digit code. eg. 57538 if you have a region 2 player.
4) When it works a 2 (your current region) will appear in
the top left corner.
5) Press 9 to make it region less.
6) Press Eject to OPEN to open the disc tray.
7) Press Eject to CLOSE to close the disc tray.
8) Power the unit off
9) Now power the unit on again, it should now read all
regions of DVD/BD Disc.

Here is a list of all the region codes:

R1 - 29334
R2 - 57538
R3 - 56732
R4 - 76884
R5 - 53814

check and replace caps in the power supply as they maybe leaking causing the voltages thought the unit to be unstable.

Have you checked to see if it is off track? Sometimes when these machines get bumpbed, dropped, or fall they can jump track. You have to take the cover off and inspect to see if it is off track when it closes and opens. It should go all the way back on the track when it closes. Be careful not to shock yourself. If it is on when you do it and your hand touches the metal parts inside you can get seriously burned or shocked.

f the tray won't open or close properly, check the belt for dirt or wear. Then check the tray for misalignment. If needed, remove, clean, lubricate, and reinstall the tray following the instructions in the owner's manual.
God bless you

Hello,

The fault is not from the disc, it is from the player.

The disc tray is actually malfunctioning. Which is as a result of a fault on the mechanism that is controlling the opening and closing of the disc tray.

Another fault might be that the button that controls the disc tray might be stuck.

test if it is the button.

1. Unplug the player from the power source,
2. plug it back,
3. turn it on,

if it opens without you pressing the open button, then the fault is from the button.

check it for any irregularity.

1. get the appropriate screwdriver,
   
2. open the cover of the player,
3. carefully force the front control panel open from the sides,
4. then check for any damages,
5. change the open button and it will be okay again.

test if it is the disc tray
press the open button, if it opens closes continuously.
then there is a problem with the mechanism that controls the open and close of the disc tray.

to fix this,

1. Get the appropriate screwdriver,
2. open the back cover of the player,
3. look to the left side of the player and you will see a mechanism that controls the tray,
4. change the mechanism with a new one.

after doing that, the player will be in good condition again.

take care

1) Turn on the player with no disc in the tray
Wait till the unit is at the Samsung logo screen.
2) Open then close the tray, wait to see the No-Disc Message in the top Left Corner
3) Now press the REPEAT button on the remote, followed by a five digit code.
In this case Repeat 29334
4) When it works a 1 will appear in the top left corner
5) Press 9 to make it regionless.
6) Press Eject to OPEN to open the disc tray.
7) Press Eject to CLOSE to close the disc tray.
8) Power the unit off
9) Now power the unit on again, it should now read all regions of DVD Disc.

Enjoy

This fault usually happens if the disc being read is not compatible with the player's firmware.
If discs are burnt from a computer, or copies, this can happen.
Does it do this with all DVD's?
Are you using commercial retail DVD's?
Otherwise something else is telling the player 'No Disk'.
Try a disc-based lens cleaner as laser may be grubby.
Or the laser diode could be defective.

It can only be repaired by the repair shop I think your son broke a lug on the inside it may need a new tray?

you should try inspecting & servicing the tray transport mech first and then the tray sense swt.

Getting to the dashboard screen is a good thing but still cannot rule out a bad circuit board or power supply. All the symptoms point to a bad DVD drive but the opening/closing by itself do indicate a problem with the microprocessor. Can you turn the power on and off with the small button?? If not, would definitely suspect bad board.