Chances are it's just a failing electrolytic capacitor in the power unit.
Normally I would say to simply purchase another unit online from EVER Corp. online, but if you have the electronics knowledge, you can probably fix it yourself for a few pennies.
look for capacitors that are bulging at the top or bulging/leaking electrolyte at the bottom.
Replace the capacitors with ones of equal uF rating and equal or higher voltage rating.
Opening the power unit itself of course is an adventure as they are sonically welded, and you'll have to tape or glue it back together if you do manage to get it apart.
You may simply want to look locally for ANY power adapter that is the SAME voltage, and EQUAL OR GREATER current. (it helps if the connector is the same too, but you can always put the old connector on the new power supply)
In other words, don't replace a 16V adapter with a 19V adapter, but you CAN replace an adapter rated at 2.0A with one rated at 3.5A as long as the voltages match.
Possible that the cord has a short within the cable and so the adapter trips off. This happens when the cable is coiled or is not taken care.
Please check the link below for some tips:
http://www.fixya.com/support/r5164850-laptop_power_supply
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