Laptop wont boot after BIOS update

Hello
i have a compaq CQ61-303SV laptop
i tried to update the BIOS and i download the file form the hp driver and support website
after i update the BIOS the laptop wont to boot and stop on a black screen
what to do please ...

Power down the notebook, disconnect AC adapter and remove the Battery, hold the power button down for a full 30 seconds, connect AC only, hit the power button and see if windows will load.

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