ASUS N56JR win 8.1 black screen on boot up

So about 2 months ago I had a required windows update which forced a reboot, and after it rebooted it never turned back on fully - I waited a very long time around half an hour before pulling the plug and had to wait, continuously taking the battery out and restarting it until it finally worked several hours later. (when I wasn't touching it)

Since I normally hibernate my computer, this is not an issue, but now every time I restart my computer it will make the whole screen black and sometimes I can't even hear the fan going.
So I assume it's something to do with the windows update? I'm using an Asus N56JR which uses a hybrid graphics card of nvidia geforce 760M and an inbuilt intel graphics card so there might be some problems there, but I have since updated the BIOS and graphic cards drivers so any other help will be appreciated
(Oh and I'm running windows 8.1)

Other info: I have tried the usual taking out battery and charger and holding the power button but this does not seem to affect anything

The computer runs fine until I restart and then this happens again

The Wireless and Hard drive icons are repeatedly flashing

The fan is turned on and USB ports are working but I can't seem to access safe mode boot or BIOS.