Can I replace a Dell XPS M140 laptop inverter on a Dell Inspiron 5100 laptop?
You can though normal operation cannot be guaranteed. The two laptops are from the same era; their inverters were made to handle different power requirements. If you want an inverter for the Dell Inspiron 5100, get one specifically for it. You can get one at http://www.amazon.com/LCD-Inverter-Notebook-Inspiron-Latitude/dp/B004L7NAUU for $7.98.