Solved! Acer aspire 4520 problem

[evilyuanjie]

i have a acer aspire 4520, it power up but no display, do anyone know what the problem and how to fix it?

 

[EnderWiggin]

Try connecting a monitor to the VGA out, do you see anything? If yes, then your display might be defective or failing. If no, then the graphics controller might be defective. Either way contact Acer Tech Support....