Regardless of your battery status, it should work when plugged in. If not, you may have a hardware problem. When it works on a fully charged battery, how long does it run? If less than an hour, it's probably reached the end of its useful life, usually 300 charge/discharge cycles.
I have Hp EliteBook 8530p.I unplugged it and when battery remain 4% I started video game on it.It suddenly turn off and wouldn't started till now.I have turn off battery and do many fixer but could not happen.When I plug it on battery and charge it not a single light lit up.What is happen to it.Is it's CMOS battery is died completely or battery is died completely?Please tell me all possible solution.