Vostro 1520 bleeps 3 times but screen stays black

[trinity18xxx]

Hi we are having a problem with our vostro 1520 lapton it as been working fine but all of a sudden the screen stays black when we turn it on and it makes a bleeping noise it loads up ok but screen stays black help please.

 

[xunicronx]

it looks like it could be a motherboard or chipset issue.

http://en.community.dell.com/support-forums/laptop/f/3518/p/19435242/20046244.aspx#20046244