I have a Dell inspiron 7000 series 7548 that is only 2 years old. I have been experiencing display problems with the laptop for about 2 weeks. The device starts up with a blank screen and the backlight is on. I have tried everything that I could to resolve this issue i.e. re-installing Bios and the drivers, updating the drivers and running the start up repair. nothing is picked up when I run a test for hardware and software. The only way I can start up the display, is by holding down the 'D' key and the power button. When I connect to an external monitor, the device display works perfectly on the external monitor. Please can you advise on what I should do as replacing the mother board is far too expensive in my country.