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Fixing Dell LA90PS0-00, 90W AC Adapter for Inspiron 9400 laptop

For the past year or so, my laptop has has only been running at half speed (0.96 GHz), because the AC adapter was unrecognised (even though it is a genuine Dell power supply). Sometimes, after the laptop had been running for about 2 hours, I could get the adapter recognised by unplugging and reinserting the power lead at … Continue reading