[SOLVED] How do I MANUALLY disable a GPU on laptop?

Apr 20, 2022
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When I say manually, I mean it literally, not through BIOS.
I have a very unique problem: BIOS cannot be accessed by any means, tried everything and also, system can’t be loaded from HDD. Tried changing CPU, RAM, fiddling with battery, I’m ~75% certain at this point that dual GPU is causing the problem, because: 1. it used to before, 2. I always keep the second GPU deactivated (in BIOS) and the problem appeared once I accidentally restored BIOS defaults and forgot to disable the second GPU after closing BIOS and restarting, I’d say it’s pretty clear that the GPU is to blame here, other than that, it could be motherboard.

To clarify, I’m using an old HP ProBook 4535s laptop and I have one GPU integrated in CPU (that one works fine and it has in fact better performance), the other one, that is integrated onto motherboard (Radeon 7450m), is the one I’d like obliterated. Is it possible to do?