Toshiba m400 dvd does not

There is a problim with the optical drive/reading mechanism. You need to get it repaired or purchase a new one (works out almost the same, if not cheaper)

Check if there is a disk stuck inside, if the problem is that it does not start and there is a cd inside, then remove the disk.
To remove a disk stuck, press repeatedly the eject button while you start up the unit . Do this a couple of times.

If instead the unt make a clicking noise each time you insert a disk, like it is attempting to read but it does not read:

If it does this always with same disk, then it is just a defective or dirty disk.

If it does this with all disks then it is a lens problem: the Cd starts spinning, the lens does not read the start of the track, and the motor keep clicking.

Clean the lens using a cleaning kit, the ones with cleaning solution.

Here you get cleaning kits.

If this does not work you will need to take apart the unit and clean the lens directly accessing the lens pickup, using soft cotton and isopropyl alcohol.

If

This is a mechanical problem. As an expert I would advise you to get it opened by some professional technican and let them check for the problem or elase the entire mechanism may get damaged. You can contact Bestbuy for this.

Thanks

Hi,

see if the player tries to read the disc. Load a disc and listen.
Does the player make squealing noises or is it totally quiet? Squealing noises may indicate that the player is trying to synchronize with the disc but can't due to an obstruction on the lens or in the laser path inside the pickup or a defect in the pickup. This can also be caused by an intermittent signal problem due to a faulty ribbon cable.

Totally silent means that the photo sensor is not getting any usable input from the laser at all, meaning that the pickup is "blind" for lack of a better word.
This can be caused by an obstruction of the beam by foreign matter on the lens or inside the pickup all the way to a marginal or failed laser diode and/or photosensor array. This can also be caused by a bad ribbon cable with one or more severed traces.

You could try to clean the optics. This is the most common malfunction as far as i know in all disc players. It would involve taking the cover off and finding a way to expose the lense, and then cleaning it with a very gentle brush. some players have a cover for the lense that swings to the side during playing, this greatly reduces the chance of dust accumulating, but its still worth the try.

If you actually see dust on the lense, then its just that simple. clean, close, play.


It may also be worth your while to check on the small shafting that guides the carriage of the laser pickup. Dirt, grome, dust and solidified lubricant can cause stoppage of the carriage and the laser eye then fails to read the next track. Please refer to the image i have attached.