i have a tnt2 m64 32mb graphics card in my pc whae i came to turn on my pc there is nothing showing on my monitor i have put in a new card but still not working , can someone help please

Is this a new problem? Were things working OK previously?

Try booting into Safe Mode options:

After the power-on and BIOS POST or your Logo screen repeatedly tap the F8 key or hold the Ctrl key before Windows starts.

If you can access Safe Mode try loading the drivers for your card after uninstalling any previous graphics drivers.