My inspiron n4020 started not recognizing AC adapter at start-up, and not charging the battery. I understand, BIOS disables battery charger if it doesn't recognize proper adapter. I replaced the original Dell adapter, but after a few months the same issue emerged. The computer works otherwise fine, just the battery is not charging. I have updated to BIOS A05. No change. Any other BIOS fixes available to so that the battery charger remains functional? Or any other solutions except buying adapters every few months?
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