How to degrade firmware or find a repository of older keyboard firmwares for ASUS G15 GA503RW

[TJ25]

I have a problem of my alt keys not working. I first concluded it was hardware issue but it seems not to me. 

The alt keys work together or they together dont. When I uninstall the keyboard driver from device manager it and re install after a few moments it again works and then after a few uses it doesnt. 

I want to try installing other firmwares if possible.

Anybody have any idea?

[Anbby_ROG]

Hi @TJ25 ,

Based on the information you previously provided and the troubleshooting steps you've already taken, we still recommend further hardware diagnostics to identify the issue. Thank you.