My 6 year old Toshiba laptop whose battery is not charging anymore but it still used to turn on,anyways I tried to turn it on today,after a min it starts to flashing red like its battery is low and I have the charger on it then it turns off or reboot,and the same happened,I tried turning it on without battery and didn't work.please help!I tried removing the battery and holding the power button for a couple of mins too.