Lenovo z50 beep once when turned on

It is probably the motherboard that beeps if it runs normally dont worry. If it doesnt that might mean the motherboard has a problem if you encounter a problem call the tech service
 


hello yeah it only beeped once then i turned it off then on to see if it beep again but it didnt and it ran normally.. so i assiume its okay? why did it beep in the first place do you know? thanks!