Problem with Laptop

[hugginsc]

I have a Dell Inspiron 6400 laptop and I have problem.

Basically, everytime I disconnect the laptop power supply the PC turns off.The icon indicates that No batter is detected.

My question is, do I need to replace the AC adapter or the actual PC battery?

Thanks

[rojash]

Well clearly if the pc works when connected to the power supply, then the power supply must be working!
Logically it follows that the battery is duff.

[Hammer]

Not necessarily Rojash, Dell laptops are funny things. Mine worked fine when plugged in but failed to charge the battery. As soon as you unplugged, it turned off. I replaced the power supply and hey presto, everything was fine again and the battery charged. Apparently there is a data-feed as well as power coming in from the power supply and the laptop will only charge the battery if it gets a signal saying "I'm a genuine Dell power supply". It's this data-feed going wrong that stops batteries charging even though it works fine on AC power.

[tamborine]

Remove the battery and re-insert same. Sometimes the kinda go on strike.