I bought a new motherboard for my sony vaio vpceh18fx and the oem battery woudnt work, i assumed it was because it hasnt been used in over 7 years so i bought a new one, sadly i cant get a oem one in my country so i got a 3rd party one. but no luck. the laptop will flash battery light once when turning on then stay off. i tested the leads on the mb and when pluged in i get around 12v, when battery is removed 0. could anyone please point me in the right direction? im not worried atm about windows not detecting.