ATi Mobility Radeon HD 7750 garbage screen on CF-52 Panasonic

Hi all, I own a Panasonic CF-52 MK5 i53360m with additional Graphic chip ATi Mobility Radeon HD 7750. After some years of use graphic chip tipically goes wrong cause to hi temperature or bad dissipation. Maybe it needed a reballing, but is a renevable issue. It will occurs again in few time. So i need to know if there is a mod to exclude graphic chip and use the Intel HD4000 integrated graphic. I owned a CF-52 MK4 some years ago, and it had the graphic chip disabled, so it is possible. I don know how, I buyed it still bypassed to intel graphic chip. SOmeone can help me? I love my CF-52 and I would like to fix it.
Thanks

No way to disable it in BIOS / UEFI? I worked around some failing onboard dGPU chips on Intel Macs with Windows by simply disabling the GPU device (in Windows). You might lose access to some graphic outputs (hdmi, DP) depending how it is wired.