XPS 15 failing to come out of sleep mode after Win 10

Hi all,

I have a problem after the Windows 10 install where my laptop doesn't come out of sleep mode. I can put the laptop into sleep mode no problem. When try and wake up the laptop, it comes on however the screen remains blank. I have tried unistalling and reinstalling both the Intel intergrated graphics and the nvidia gt525m graphics drivers - both are Win 10 ready. Let me know if you come up with anything.

XPS l502x, i7, 6gb ram, gt525m graphics

Thanks in advance,

Jack