no display ,the caps lock and num lk light gives 2 long & 2 short flashes. and beeping 5 times

[myaomar1]

hi , I have an HP ProBook 640 G2  laptop with Windows 10. when the laptop power on  The caps lock and num lk light gives 2 long & 2 short flashes. and beeping 5 times  after that the fan stell spin and caps luck flashlight 2long & 2 short but nothing despalying  in the  screen , i have seen in other posts that this is a corrupted BIOS file.

I have tried hard resetting the laptop by removing the battery and charger then discharging power by holding down the power button for 30 seconds. I've tried removing the CMOS battery, a different SSD, and powering on without the battery just with the charger. 

The BIOS recovery method with either WINDOWS KEY + B or V has not produced any results. 

Any help / advice from anyone on here or from HP would be greatly appreciated. Thanks!  

[WAWood]

@myaomar1 

If the built-in BIOS recovery method does not work, you can TRY using the method below -- but there is no guarantee it will work, either:

This is an indirect method for creating a BIOS update boot USB stick -- which comes in useful if you can not boot your PC into Windows and you need to do a BIOS update.

Macrium Reflect (MR) is a free tool that can be used to image and restore PCs, but it also has an option to create Rescue Media (is disk or USB form) that can then be used to Repair your PC.

It is available from here: http://www.macrium.com/reflectfree.aspx

What I recommend is the following:
1) Download and install Macrium Reflect (MR)
2) Use the option to create a boot USB stick
3) Open File Explorer to point to the USB stick
4) Create a folder on the USB stick named Apps
5) Download the HP BIOS Update file (this is a self-extracting archive file)
6) Copy the HP BIOS Update file to the Apps folder on the USB stick

NOW, you have a bootable USB stick that also contains the HP BIOS update file

Boot your original PC from the USB stick. It will take a few minutes, so you have to be patient. Could be 3 MINUTES or longer -- it's slow.

The USB stick is designed to repair Windows problems, but you don't want to do that. So, when you get to the app, down at the bottom-left of the screen are three icons. The right-most is a file manager -- click that to open it. Then, find the HP BIOS Update file and double-click that. That will start the BIOS update process.

When it is done, remove the USB stick and reboot your original PC.

[myaomar1]

@WAWood

thanks for your advice, but the solution it's not working for me

because i have nothing in the screen (i try with a externel screen but nothing worked to) , even if i make the usb stick on other PC and i do what you teeling me, i add the folder apps and make the bios update in. but i have the same problem just a beeping sound and black screen, i think i should update the bios externly if i hav'nt an other way. the win key+B or V doesn't worked and i don't know why