Acer Predator Screen Replacement to 120 hz

Hello to everyone.First of all sory for my bad english .

Me and my friend have the acer predator 15 (Gtx 1070 ).As you know predator 15 has 60 hz G- sync screens.We want to change screen.As we began to do research, we found that the triton 500 had a 120hz gsync panel.We then purchased the B156HAN04.2 display. This screen normally supports 120 hz and gsync.After installing the screens, everything works normally, but gsync has completely disappeared.
ı want to ask ;

Is the screen support but g-sync cannot be opened due to bios?
If the problem is bios, how do I interfere with bios.

Thank you in advance for your help.

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VURALSERHAT

Hello there,

I'm having a similar problem. I installed the drivers cleanly. I tried to install the older drivers. but somehow I can't activate it. I'm looking for babayiğit to help.