checkpoint [WAKE]

Hi can anyone help with my problem. My Dimension 1950 shut dow with a blue screen and stop 0x0000008e, 0xc0000005, 0X8081C09C, 0XF73DA630, 0X00000000. When I try to boot the system the screen shows floppy diskette seek failure previous attempts at booting the system have failed at Checkpoint [WAKE]. The diagonistic light sequence stops with lights 1, 2, and 3, green and the light for number 4 is not lit. I would be grateful for any help in resolving this problem.

                                                                                              Regards nell11.