Help. My old LenovoG470 just got a blank black screen with a underscore not blinking

[Windows Server]

it was lenovog470 running on windows 11 server and while installing it I use setupprep.exe in the iso but this is just the details here's the problem.I was playing games raging out cause it's lagging so bad and I didn't know much anything until I trying to overclock my laptop using... Advanced bios and I did change something on the bios well. I thought old laptop can overclock until now I know I need to use the uefi bios to overclock cpu to make the laptop or PC runs faster than my Wi-Fi at 3 am. Can anyone help me fix this thing it was a windows 11 server it doesn't boot up and I think I just

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