HP chromebook is not turning on after flashing firmware

I have a HP chromebook AMD Ryzen 3 3250C, 14b and i’m trying to install windows 10 on it.
After i completed the “Full UEFI firmware” installation and turned off the device, it hasn’t turned on again, not even when i push the power buttom or refresh buttom at the same time and its impossible to continue with the windows installation from a USB.
What can i do to solve this issue?

perhaps you forgot to reconnect the keyboard after opening the bottom cover for r/w screw, if that’s not the case then try re flashing the backup firmware using a Suzy q cable.

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