my toshiba satellite c850-1d2 laptop powers on for a second and powers off an repeatedly does this until the battery runs flat or i take the battery out.. I've bought a new battery as that's what I thought it was.. I've tried holding 0 and the power button but nothing and I don't know what to do and I don't want my pants pulled down to get it fixed... What could it be an how could it be sorted please any solutions welcome