Problem with Dell N5010 Laptop

[max347]

Hey everyone, I am wondering if anyone has experienced a white screen issue with an N5010 Dell laptop.

When you turn it on, the laptop only displays a white screen. When you connect an external monitor, it works perfectly.

I have tried-
reseating both cable points, then I went ahead and bought a new cable
Replaced the LCD (It is LED backlit)
Cleared the CMOS
Stared at it for a long time

Any ideas?

 

[C1]

A guess would be that a video driver chip has gone bad. If possible, with the unit on (ie, the subject LCD displaying the white blank screen), flex the MB and probe the onboard components and even connectors using a "newt" stick (ie, checking for possible bad solder joint).

 

[lakedude]

Laptop LCD screen is solid white colour or garbled

This indicates that you have a problem with the Dell Inspiron N5010 laptop’s LCD screen or the LCD cable connection.

http://www.laptoprepairfix.co.uk/dell-repair/dell-inspiron-n5010-lcd-screen-graphics-chip-repair.htm

But you already replaced the screen and the ribbon cable?

Heck if I know!

The external monitor proves your video card is working at or at least mostly working.

 

[max347]

Yeah this is why I am dumbfounded, ive replaced the LCD and cable, and the laptop works fine on an external display.

C1- I've poked and prodded everywhere to no avail. Ive probably reseated these stupid cables a dozen times now.

I can only assume its a faulty motherboard, but why does it work perfectly on an external screen? So weird!