Laptop Power Management Software Problem 2011 : Sometimes, the problem is merely with the power management software. The classic case, when the laptop charges when switched off, but doesn't when the computer has booted. The software may have gotten corrupted which must be causing the problem. In such a case, go to the device manager section and uninstall the power management software. In case of Windows XP, uninstall 'Microsoft ACPI Compliant Control Method Battery listing' from the device manger section. Take care that you do not install any other AC adapter driver software.
Internal Charging Circuitry Problem
If neither the AC adapter, nor the power management software has a problem, then problem can be with the internal charging circuitry of the laptop. In this case, there is little you can do, other than send the laptop to the manufacturer's service center.
Bad Battery
If you have checked for all of the above, one of the main reasons, which could lead to the problem of laptop plugged in but laptop battery not charging is a bad or dead battery. Run a laptop battery test. If your laptop is quite old, this could be one of the most likely reasons. Get the battery checked from the manufacturer and check if it has exceeded its predicted recharge cycle limit.
Via : choiceboll.com
If neither the AC adapter, nor the power management software has a problem, then problem can be with the internal charging circuitry of the laptop. In this case, there is little you can do, other than send the laptop to the manufacturer's service center.
Bad Battery
If you have checked for all of the above, one of the main reasons, which could lead to the problem of laptop plugged in but laptop battery not charging is a bad or dead battery. Run a laptop battery test. If your laptop is quite old, this could be one of the most likely reasons. Get the battery checked from the manufacturer and check if it has exceeded its predicted recharge cycle limit.
Via : choiceboll.com