Hi,
My name is Jaspreet and I work for the Social Media and Community Team at Dell.
Try removing the battery and AC adapter, press and hold the power button down for about 15 seconds, then connect the AC adapter and try powering on.
If light on the adapter stays on while it’s not connected to the laptop, there is no issue with the Ac adapter.
However if the light on the AC adapter turns off as soon as you connect it to the laptop, unfortunately there is an issue with the motherboard of the laptop and you would have to get it repaired.
Kindly get back if there are any further queries. Glad to help. Thanks,
Jaspreet
Dell | Social Media Outreach | Global Social Media & Community