I installed a SSD on my ASUS K95VM laptop. I kept the old HDD for storage and installed the OS on the SSD. Now comes the strange part. After restart laptop boots normally, I can see both HDD, all is OK. BUT after shut down, or when I start laptop later, screen does not lit, is completely black, no flashing underscore, nothing at all. I can't enter bios. No signal on external monitor connected to VGA port. Power led is normal green, hdd led flashes but no signal whatsoever.
What I tried: pressed the power button until laptop shuts down, removed power cable and battery and waited a few minutes than put it all back. Laptop starts and sometimes screen starts also. Other times I keep starting from the button (and consecutively hold the power button down to shud down if no screen signal) until it's starts. I disabled the fast boot from windows - still the same. bios is in uefi mode, both hdd ar GPT. A, if I remove one of HDD, no matters which one, it works, laptop boots with SSD or says no system disk with the old HDD.