New graphics card
I got a new graphics card for Christmas for my hackintosh. Its an older model Nvidia 8300 GS which has the lowest power consumption I could find so I don’t overload my power supply but still is HDTV ready.
I got it working eventually by configuring the NVCAP using OSXTools and choosing custom and then selecting the memory and DVI/VGA.
Then time machine and airport stopped working of course and I had to reconfigure them. The main task was to remove the /Library/Preferences/SystemConfiguration/NetworkInterfaces.plist file and reboot.
Went to Network System Preferences, tidied up the network interfaces (deleted bluetooth, a serial device, and the Firewire device) and re-configured Time Machine.
I lost all past backups but it now works.