Dell I8000 / Radeon 7500

[Matthew H. Urban]

Dear Sean,
got your email off a message board.  Wondering if you can help?

After uninstalling old video drivers for old card (ATI M4) and installing new card (Radeon 7500M) on Dell Inspiron 8000 laptop, the machine won't even boot.  Press the power, light comes on for 1 or 2 seconds and then off.  The boot doesn't even start.
     What am I doing wrong?  If you're not sure, can you point me in the right direction/weblink?
thanks,
Matt