I have a DV7-7212nr with Win 8.1 currently installed. ONLY ON BATTERY. Works great on AC.
When I lower the lid, the screen remains on.
When I raise the lid, the laptop is frozen. The screen looks just like it did before I lower it.
Cursor is frozen and my only option is to hold the powerw button down for a hard reset.
I previously down-graded to Win 7 Ultimate x64 and did not experience any issues whatsoever.
I did a fresh install of Win 8.1 x64 last month so I could use the UEFI and faster start ups.
HP Support application shows all drivers are up to date.
No viruses after several scans.
Latest BIOS update used for all 3 OS versions.
I have disabled hibernate and sleep for battery and AC.
Only allow shutdown when pressing the power button or in the OS.
Any help is appreciated.