Discrete graphics card not working on laptop

Hello, the problem is that the discrete video card does not work on the asus n550jv laptop, it writes error 43 in the device manager, the games slow down, but you can’t really play on the built-in video card, here are the specifications of the laptop-i7 4700HQ, 8GB RAM, GeForce GT-750M 4GB, Intel HD Graphics 4600, Windows 7 Ultimate x64; deleted the driver in the device manager, performed a clean installation of the driver, didn’t find anything like that in the BIOS, no viruses, Windows is clean, recently installed, I don’t know, the problem is either software or hardware, if you know something- let me know, thanks in advance