sorry, been away. So you got USB power right? If that is so we can try a few different programs.
First option is to grab a boot disk from anyother WIn 8 computer and use that (USB boot is also included here too). That is assuming that you have enough power to get the DVD to work. If not, there are some tools you can use to boot from.
First off is a great tool by Kaspersky that uses a GUI that can allow you to get into windows. I have used this before on more than one dead computer. Here is the link to the download. PLEASE READ THE HOW TO BEFORE YOU DO IT.
Picking the right options is super important.
What it will do is give you something that will allow your computer to boot. Its a safe mode type semi windows gui. But it will allow you to grab your data off of it, and if you read a bit, you MIGHT beable to sneak a system disk out. Kaspersky Rescue 10
The Q&A for no boot and windows issues is here FAQ Kaspersky Rescue 10
Another option is the good people at Pendrivelinux.com These guys have TONS of tools for everything. IF you grab multiboot USB creator This can allow you to create a multiboot drive to boot from. I think you might have a multiboot drive setup. And something between 7 8 or 8, 8.1 didnt encode right or got a write error in it. Either way use this with the .iso from Kaspersky Rescue 10 to make a multibook options for recovery if that is the case.
Start there and see if that is the case. You can also grab a boot disc from another windows 8, and mount it to a USB or DVD. USB option is here
If the boot is still not allowing these programs to run then a GREAT Boot repair/and drive repair tool is
TestDisk and you can grab it here
Just remember, if you try a DVD player and you cant get power to it, see if you got one that you plug into the wall for power.
If you dont try the Flash Drive, uses less juice. When you do this try different ports, and if your getting power issues, just plug in the USB.
I would like to know something. When you start the computer, do you get any screen, IE the manufacture Flash, or a quick Windows screen? Or do you start it up and just black, no prompt no nothing.
good luck and sorry, works been crazy.
thanks for waiting