HP Notebook has a black screen after Bios update

Product Name: HP Notebook - 15-bs028ne
Operating System: Microsoft Windows 10 (64-bit)
Hi all ,

I had recently purchased a
HP Notebook - 15-bs028ne
As i got the bios update file from official hp site ,and followed the instruction's given to update my bios .
The bios update was taking tooo long (more than 2 hr's) ,i had to remove power and battery .
After that i cant turn my laptop on .The screen is blank (some black random flickring is their) ,the power led is solid white .
After trying to boot up ,at almost 5 mins late the caps will start to blink 2 Quick White Blink followed by 2 Slow White Blink & it repeat's .
I tried to boot to bios recovery using Arrow Key's & Win+B/V ,but it does not show up anything except the black screen !
Its a brand new laptop .

Spec's :- i7 7TH Gen
8 GB RAM
1 TB Hard Disk
OS : Win 10 & Ubuntu 17.04 (DUAL BOOT)

Please help me in finding a solution to my problem !