I stopped in the computer press [TAB] to show POST screen [DEL] to ent …

I stopped in the computer press [TAB] to show POST screen [DEL] to enter SETUPESC to enter boot menu does not move here!
situation appears as follows:
computer crash after stopping on the press [TAB] to show POST screen [DEL] to enter SETUPESC to enter boot menu here has been fixed, no matter how they are to return to the resumption of “press [TAB ] to show POST screen [DEL] to enter SETUPESC to enter boot menu “here.by the other key is not moving, that is, since fixed, the keyboard light is not bright.I will start off one after another on the right .
Please! What sort of situation? How to solve this problem?