Hi, i hope this is in the correct place, never posted here before. afew days ago i was using my laptop as normal running on AC power, but after it being on for about 30 mins the backlight started to dim and brighten quickly and the icon in the system tray was also quickly changing from the Ac icon to the battery icon, after about 10 seconds of this it automatically switched off. (backlight was changing because its set to dim during battery usage) i left it alone for a good hour or so, when i tried to turn it back on it would not power on. when the power button is pressed the power light sometimes flashes on for about a second before turning off again. also when the battery is connected and the power cable plugged in the battery charge light is lit. it is a HP laptop, and nothing new has been installed/changed recently, its 2 maybe 3 years old. any help would be great, or even ideas what it could possibly be, if you need any more information please ask.