I have a toshiba that will not display anything. I have replaced the inverter,lcd and the cable still no luck. When I hook up a external monitor it works fine. Not sure what to do now. Could there be a problem with the motherboard??? Is there anyway to check and see if power is getting to the inverter??? Thanks for any help I can get.

probably a bad internal cable to the LCD. Have it serviced.
This won't be an inverter issue.

Have the MOBO replace could be something gone bad on the board it does happen...

The only thing left is the motherboard or one of the parts you already replaced may be bad... this does happen too

Thanks for all of your help .