The D620 does not have a separate charging / inverter board on the main motherboard. So the entire motherboard usually needs replaced. A lot of work for someone not trained in laptop repair. I usually replace about 3 or 4 of these motherboards per week, and it takes me about 1.5 hours per board - just to give you an idea. BUT, several places on EBAY say they can repair the board so you won't need to purchase a new motherboard. It usually costs about $150 - about $75 less than a motherboard without the labor of a technician. Check EBAY and look for one of these auctions where you can send in your laptop and they can fix it and send it back for less than the cost of a new board. If not they usually buy your laptop from you to use for parts - like the LCD, hard drive, keyvoards, etc. Good luck Eric A+ certified technician DELL warranty certified technician