If you are working from home and suddenly one day your Dell PC doesn't boot up and you are very stressed out then try these troubleshooting tips from the Dell tech support YouTube channel:
and this video:
I really hope it helps. If it doesn't then try referring to your Dell PC User's Guide. The electronic versions can be accessed from the link listed here: Dell Manuals
If you still have troubles then reply to this message and I will be back with you soon.
Also check out the Dell support twitter page at: Dell Support twitter
The Dell facebook page: Dell FaceBook
The Dell tech support YouTube channel.