Did you measure the adapter's voltage output? What is it?
Mind you if you write you have no Volt meter, head to a friend or shop to check that out.
Also, how old? At 4 years I strongly suggest folk limit the repair work. New charger or battery but repairs cost as much as a new laptop today.
hello people i have the above laptop and it was working fine last night shut it down had half battery life now it wont turn on atall no charging light no sounds only lights that come are the 3 in the bottom left of it which flash if i have it plugged in and push the power button, have tried a hard reset to no avail if anybody could help it would be great,