Dell inspiron 1501 cannot indentify ac adapter

Try this first. drain the flea power. remove batter and ac adapter. press and hold on the power button for 10 seconds. plug back ac adapter and battery. go online to http:support.dell.com then download the latest bios update.

once you reach the dell support site select on support for home users. then drivers and downloads. enter the service tag.

when the list of drivers and updates are listed make sure you selected the correct operating system. look for the BIOS then download it via browser. (do not download the manager)

after the download run or install the update.

If all fails. try a diff ac adapter if same problem message appears then replace the motherboard. else replace ac adapter.