Computer saying reboot and add device to reboot but wont shut down

Hi guys,
I have a satellite p750 and it has gone into black roll (i think). It has the black screen that continuously says reboot add device to reboot. I have been studying this forum and tried the factory reset but the problem is my computer will not shut down! I have been holding down the on/off swith for a very long time and that is not working. Then i do the ctrl/alt/del and the computer tries to shut down but starts up again straight away. I have done the f12 and f2 but with out any luck. I would like to be able to do a factory reset but the computer will not turn off??? Any advice would be really helpful
Angela

Hi guys,
I have a satellite p750 and it has gone into black roll (i think). It has the black screen that continuously says reboot add device to reboot.
I would like to be able to do a factory reset but the computer will not turn off???
It jumps straight out of sleep mode. It refuses to shut down.
Remove the hard drive then re-install it to reseat the connection.
Try to reach BIOS with hard drive removed and set to defaults, then reinstall drive to try again. (resetting defaults may turn off, fast start, sleep mode, eco settings. I suggest not to use any of those.)
Try testing the RAM, remove and reinstall one at a time and in different slots to test RAM and RAM slots.
Try pressing fn and F2,F8,F12, the number 0
If its windows 8 press shift when you shut down.
As requested earlier post your full model and operating system!!!
S70-ABT2N22 Windows 7 Pro & 8.1Pro, C55-A5180 Windows 8.1****Click on White “Kudos” STAR to say thanks!****

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Computer saying reboot and add device to reboot but wont shut down

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