About This File
This graphics card is post 2010 version of nVidia GeForce 8400GS 512 MB PCI-E.
1. Remove GeForce.kext, NVDANV50Hal.kext, NVDAResman.kext from your /System/Library/Extensions.
2. Use KextHelper app (in the attachment) and install the kexts.
I have added 0x10c310de 0x0be310de in IOPCIMatch key inside Info.plist files of GeForce, NVDANV50Hal, NVDAResman. So you just need to run these kexts in KextHelper and reboot. You should get a screen working by now with Display connector value as 1619w.