laptop battery not charging, pulling out charger will turns it off immediately

[classyamin]

hi there
there is something weird with my laptop
my laptop will not turn on without ac adapter
battery is in good condition
i checked battery and ac adapter and both was fine.
but the problem is even without windows, with battery installed, when i pull out the ac adapter it turns off.
it is not related to acpi driver.
in windows, it says you have 46% remaining battery, but it does not detect the ac adapter.it means the LED of charger input will not turn on and the icon of socket is not next to my battery indicator of windows. it means that the system is working on battery.but the moment i pull out the charger, it turns off.
i hope i explained it in good condition so you could understand.
my laptop is sony vaio vpcf134fx.
please help.

 

[1shado1]

How old is the battery, and how do you know it is "fine"? What if you remove the battery and try to run the laptop with just the charger?