Laptop black screen on startup

[Benton1]

HP ENVY 15-j140na
Product no: J0B97EA
2 years old

where I try and turn on my laptop, the screen does not come on at all.

The fan comes on full power for a second or two then drops out entirely. After about 10 seconds the fan can be heard slowly increasing to a normal level. All the while no activity on the screen.

The power light is on along with the wifi led
The caps lock led flashes in a 2 flash pattern with a long gap between

I have tried:
hard reboot
BIOS reset by holding down win + B keys when the power button is pressed but it doesn't seem to do anything

Any help would be appreciated

[Benton1 · Accepted solution]

I solved this by downloading the bios update onto a usb drive and plugging that in while doing a bios boot. My laptop is now running fine

[aryabanerjee38]

I have also got the same problem from lst 2 days.. My Laptop is not getting started. It is blank totally. I want to know after downloading d bios where or what to press in laptop after plugging d usb drive. My Laptop is 1 year old. Its Model no. is :- 15-g221AU

Thanking You
Arya Banerjee
9836011441

[Benton1]

While the laptop is turned off you:
Plug the usb stick with the bios in
Hold down the windows and b keys
Then hold the power button for 1 to 3 seconds while keep holding the keys
Should boot up into the bios software
Hope that helps