Help bricked HP G62-B22SL

[mattia2508]

Hi guys

I need your help. I have got this laptop (hp g62-b22sl) with a corrupted BIOS. It runs on insyde H20 BIOS ( latest version f48).
I have flashed a custom modded BIOS and everything seemed to work fine. When i rebooted the laptop black screen +caps lock flash ( corrupted BIOS). Win+b ( or v or arrows) didn't work so I have send the motherboard to a firm that has a BIOS flasher.
Big problem though: they have flashed a wrong BIOS image ( from other hp laptop). Now i can only Power up the laptop and open BIOS. I can t install any os and i can't boot a winpe image or a live Linux cd. I cant enter DOS though with a bootable DOS usb ( but hp won't tell me how ti flash BIOS in a DOS envrioment).
Again win+b ecc doesn't work.

What can I do?
Thanks in Advance and Sorry for bad english ( I am italian actually)

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