I used my laptop just earlier this day and my battery was not charged at all, it was running on AC. My friend accidentaly stepped on cable and shuted it down. Now this is not first time it happens, but this time my laptop wont turn up.. So i tried many tips from other forums and none worked. I have Dell Inspirion 6400, yeah I know it's old but I don't have any money currently to buy new one.. I tried removing battery and reseting laptop, also tried running only on AC but it doesn't work, however it works when I use the battery. I though my motherboard was dead but it works fine. I have also tried my charger on other laptops (i have universal one) it works perfectly fine. So i don't understand whats wrong with i, could it be the connection jack for AC on motherboard? Thanks for reading this.