Stef 's DVD player sat right on top of it , completely covering the vents . I put small boxes under the DVD player to raise it up and unplugged the box to let it cool completely down , but to no avail . I called Comcast and they said that should n't matter .

Generate a question about the above context.
Why may the DVD player be no longer working ?
Options:
(a). None of the above choices .;
(b). A wire may be broken .;
(c). It is overheating .;
(d). It may not be able to get a charge .;