I am having a dell 7520 laptop .recently when I plugged in the charger it won't charge .turns on alright .the led on the charger turns on.but the charging led on the laptop won't turn on.
1.I have tried using a different charger.the same charger works fine on my other dell laptop.
2.taking out the battery and pressing down power button for several seconds, then connecting the charger
It works perfectly on the battery though it doesn't charge it.