Hi bro,
do you have acer aspire 4720 adapter?
input: 100~240 V , 1.5A
output: 19V, 3.42A

is it the same if i use the acer adapter instead of liteon adapter? coz my liteon adapter i just buy around 1 year ago and it now start to go crazy a bit. when the light weak, it cannot charge the battery. after some time of fuzzling, the light went strong and it can charge battery. so, i think my adapter will gone in near time.