model aspire t6771-a970 wont boot

[tuface]

it just bips when u switch it on not even scrren signal nothing the bip every 5 secs i connected screen right + ps2 mouse & keybord as well dvd drive also works + harddrive runs but bips & no bios

 

[tuface]

NO WONDER I CANT FIND MY THREAD AS IT NOT A LAPTOP IT A DESKTOP COMPUTER FROM 2007