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This seems like a either a faulty or dirty laser unit in the drive. If the drive only seems to work intermittently, such as play for a couple of minutes and then totally refuse to play anything, then the laser unit is faulty. Otherwise, if this issue came on gradually over time or it simply stopped altogether, then chances are that either dust has built up on the lens or something is covering the lens, such as a bit of lint. If the drive is less than a year old, I would recommend getting it serviced under warranty, particularly if you cannot get it to read any disc now. Otherwise, if you can manage to get the drive to play an audio disc, then try running a laser lens cleaning disc in it to see if this helps first.
If the drive is out of warranty and the drive cannot play any disc, then the only way of reviving it would be to dismantle the recorder and internal drive to get to the laser lens and clean its surface. This can be done with a cotton tip bud with an alcohol solution that does not leave a residue.