PET941D/37 won't load dvd says no disc

What burning software/version are you using?

Usually the tray has to be opened and inspected and if lucky it can be realigned--if not parts may be hard to find as they usually do not sell individual parts for the mechanism.

Loading may mean it is not seeing the disc---A dirty or bad optical pickup is possible if you get this error with every disc.

The laser pickup overtime becomes weaker until it can no longer read the disc. Take some rubbing alcohol and a Q-Tip and gently clean the lens, allow several minutes to dry, if no change! the whole assembly needs to be replaced, not cost effective to repair.

Either a mechanism problem or a problem with the Optical unit inside (optical pickup) being dirty or bad.

Hello
The loading mechanism to your player is faulty. It doesn't engages the disc in to place perfectly. Replace the loading mechanism.

Check the data connector on the rear of the drive. If this doesn't work you may need a new drive, they are cheap and readily available.

Might be.

Hello
There are mainly three motors for most of the DVD players. One to spin the disc we insert in, other to load the laser pickup unit to-and-fro inside it to read the disc and an other one to load the tray mechanism 'in-out'. According to your description, the disc spins inside, and you can hear its spin. So motor which spins the disc has no trouble at all I should say. Then comes to the second motor that moves the laser assembly inside it. If it do not work, the laser pickup unit won't move and no reading will take place and 'No Disc' display will be the result. The last chance is with Laser Pickup Unit itself. Just get this unit repaired by any well experienced service technician or by the authorised service center, because, there are special tools to open this unit. As it is a compactable one, more care should be given to it while repairing. Suspect the second motor I described earlier, and the Laser Pickup Unit. OK.

I also have a Samsung Dvd player. If it is a dvd you burned yourself it may not recognize the disc. If you have loaded a purchased or rented disc and it still won't load, I would say the head is dirty or the unit is defective. I would try a head cleaner first.available at most electronics stores If that doesn't work you probably will need to send it in for repair.
good luck