battery plugged in but not charge

Hi Nora,

Please contact Dell right away. It's possible your charger is bad, which is covered under warranty. Another possibility is that your battery is bad, which is not covered by the warranty.

Even though the BIOS update obviously "fixed" the problem I would keep a (very) close eye on the situation.Once you are out of warranty you might have to deal with a faulty charger/battery or faulty mainboard.A new charger is more or less cheap but a new mainboard can be very expensive.Your system has been working fine for almost a year ,why - all of a sudden - is it necessary to update the BIOS ?There are cases where an update can indeed  make the difference but in your case a possible intermittent hardware problem cannot be ruled out.A loose cable connection or loose power jack are one of the main reasons why Dell laptops refuse to charge(Dell uses a special charging system)..Check visually the power cable,power plug,power jack - also try  gently wiggling the power plug and observe any possible charging issues.