HP Pavilion TG01-1000 Need help with downgrading CPU

[12hej12]

Hi. 
Bought a used HP Pavilion Gaming Desktop PC TG01-1000a (2W847AV) because the previous owner harvested the GPU. So I wanted to take the Ryzen 5 4600G and upgrade my Ryzen 5 1600. 
The plan was that I wanted to use the 1600 and gift the PC to my cousin, but I had not thought about the motherboard would not be able to use other CPUs.
I have tried with the 1600 and a 3200G and both stops the PC from even booting to the BIOS.
So is there anyway to whitelist other CPUs or is this just game over for my plan?
I'm not afraid of abit of microsoldering if that is necessary to modifying the BIOS, I just need guidance if that is the case.

I have included the BIOS bin that is the one installed (tried updating just in case that would do something )

Hope there is a way to do this.


PS. When I used the 4600G in my MSI X570 motherboard it shows up as a 4400G both in bios and in CPU-Z but is has all 6 cores and 12 threads so, no problem there. HP Pavilion Gaming Desktop PC TG01-1000a (2W847V)HP Pavilion Gaming Desktop PC TG01-1000a (2W847AV)