Try opening up your phone and try to disconnect and connect again the battery ribbon.

Try reflashing your stock rom through odin.

Try reinstalling your OS if you don't have anything important.

Yes, you can buy sata to USB adaptor, which might probably cost $5, if it's a 3.5” Hard Drive, you might need to buy the one that has an External Power Supply, which is roughly around $10.

Could you tell us what's the cause of the problem? If you do not know, could you tell us what is happening, does the screen only turn on when windows is booted? Or do you only get a black screen?

Tru following this guide ->https://youtu.be/KLIZDU9WF7w Though im not really sure if it's the right model

Have you tried using "3uTools?" I had the same problem. 1.Download 3uTools 2.Install it(Obviously) 3.After Installation connect your IPhone in Recovery mode 4. In 3uTools select the option called "Flash & JB" 5.Select the option called "Easy Flash" 6. And after that you will see a list of available IOS versions for your IPhone. 7. Untick the option called "Retain User’s Data While Flashing" Beside Flash 8.Just tick the Circle of the version of IOS you prefer and click "Flash" If not, try visiting your local apple store

Do a hard reset. First turn off your device. And after turning off your device keep pressing Volume Up+Home Button+Power Button. Release the power button when device is on but just keep pressing Volume Up and Home button until you are in recovery mode. When you are in recovery mode already select Wipe Data Factory Reset by using the volume rocker to scroll down and power button to select now select factory reset and you should see a bunch of no's and only one yes scroll down to do yes and select it using the power button.

Have you tried removing the speakers? If no then do. Update (05/05/2018): And have you also tried the power button on your TV instead of the TV Remote?

Hmmmm.... weird are you on Legacy Or UEFI? If you're on UEFI try switching to Legacy you might see your USB Drive Again And what program did you use to burn your Windows 10 ISO? and is the partition on the USB Drive active?