Laptop turns off when the AC adapter plugged in

Problem Description:

The laptop turns on while connected to the Dell Inspiron 1564 AC Adapter is working correctly in. The laptop on battery power but once you get him to the Dell PA-21 AC Adapter, the laptop is turned off.
Possible Cause:

First Power adapter fails.
Second Motherboard failure.
Possible steps for troubleshooting and repair solution:

First, you test the power supply. Make sure the Dell Inspiron 1520 AC Adapter is correct voltage. It is possible that the output voltage is not correct and will shut down the laptop in order to prevent the damage. Test your laptop with another known good Dell Inspiron 6400 AC Adapter.

If the problem persists, even after replacing the Dell Latitude D610 AC Adapter, it is probably the failure of the motherboard. Replace the motherboard.