Before this started, did you notice if the battery was charging? If it wasn't, I would suspect that it has something to do with a bad AC adapter. If that appears to be working, it may be an issue with the internal PSU.
Before this started, did you notice if the battery was charging? If it wasn't, I would suspect that it has something to do with a bad AC adapter. If that appears to be working, it may be an issue with the internal PSU.
Disconnect mains , remove battery and press and hold the power button, sometimes works by forcing the chraging circuit to reset, put in battery, then mains and pray.
Failing that, if under a year, contact Dell, they have had a bad batch of fubar batteries of late.