Troubleshooting chartsAn indicator problemProblem Cause and actionThe battery statusindicator does not go oneven though a batterypack is installed in thecomputer.The over-current protection device inside the battery pack has been activated.Wait several hours and try again. If the indicator does not go on, replace thebattery pack or have the computer serviced.Battery problemsProblem Cause and actionThe battery pack cannotbe fully charged in 3.5hours by the power-offcharging method.The battery pack might be over-discharged. Do the following:1. Power off the computer.2. Make sure that the over-discharged battery pack is in the computer.3. Connect the AC Adapter to the computer and let it charge.If the battery pack cannot be fully charged in 24 hours, use a new battery pack.If the optional Quick Charger is available, use it to charge the over-dischargedbattery pack.Your computer shutsdown before the batterystatus indicator showsempty,–or–Your computer operatesafter the battery statusindicator shows empty.Discharge and recharge the battery pack.The operating time for afully charged battery packis short.Discharge and recharge the battery pack. If you still have a problem, use a newbattery pack.The computer does notoperate with a fullycharged battery pack.The over-current protective function in the battery pack might be activated.Power off the computer for 1 minute to reset this function; then power it onagain.The battery pack cannotbe charged.The battery pack might not be able to charged when it is hot. In that case,remove it from the computer and leave it at room temperature for a while. Afterit cools down, reinstall it and recharge it. If it still cannot be charged, have itserviced.178 IBM ThinkPad 570 User's Reference