I have a Dell Inspiron 6000, I replaced the motherboard and did a new install of windows. A couple of days later my laptop screen stopped showing video, But works with an external monitor. I replaced the LCD Inverter with a new one and the screen worked for 2 days. I then ordered a new LCD ribbon cable to no avail. I then ordered another LCD Inverter still no video on Laptop Screen, but I have Video with external monitor.I have also tested with another LCD Screen. Any suggestions with what can be going on why I can't display on LCD Screen. Thanks to all who can help!