This is a new HP 15 BS576TX Intel laptop with Insyde F.22 (version) BIOS-UEFI provided by HP. The laptop has hybrid graphics - Integrated Intel HD620 and AMD 520 radeon 2GB dedicated card. So, HP Support Assistant showed a BIOS update to F.24 and I clicked download and install. Installation menu showed flashing went 100% as well as verification. However, there is only a black screen now if I press the power button ON. I tried these steps and none of them worked: 1. Win Key+B + Power button 2. Win Key+B + Power button with USB recovery BIOS 3. Removed battery and AC power. Pressed the power button for 30seconds, 1 minute and 2 minute. 4. Win Key+V - and does the same thing. Pretty much nothing is shown. During all these steps, laptop switched on and hard drive led is blinking once in a while (I imagine it is in a gap of 4-5 seconds). I remember BIOS flashing showed 100% and verification also confirmed.