My G72 notebook screen is very garbled but i can plug in another screen and it works perfectly.

Is this a common problem with the G 72? Does my warranty cover it?

Remove the machine from any external monitors (make sure to remove from the laptop side-sometimes people remove the cable from the monitor side-).
If docked, remove from dock.
Shut machine down, unplugg from power source and remove battery. Without replacing battery or attaching to ac power, "turn machine on" hold power button down for 10-20 seconds.
Re-install battery and power (make sure not to connect anything else). Do you see the "Thinkpad/Lenovo/IBM" splash screen? If you don't, shut the machine down and try to "shine a flashlight" into the screen...due you see a 'faint" image on the LCD?
If you do, then it could be due to several reasons in this order:
Inverter
LCD (backlight)
Motherboard.
There is a "switch" that tells the laptop when the LCD is closed or open, I had this problem on one and it turned out to be nothing more than "dust bunnies" building up on this switch...YMMV
Good luck.
Currently own: X220T, X201, X200, T61 X2, X61T X3

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