Weird one - Laptop will not run on Battery with no AC. However, when testing battery, it's fully charged. When you try and run laptop with AC and Battery in place, power comes on but nothing further - no hard drive icon flashing and no battery recognition and just a blank screen.

Runs on AC alone with the battery pack taken out - can survive with that if all i need is a new battery, but 2 things. If my current battery is fully charged, why isn't it recognising this? (Don't want to buy new battery if it's a connection problem).

2nd, at the moment, screen is so dark and it's not something that's resolved with Fn and arrow control. Can anyone tell me what's happening please?