john, your M1530 has a separate board for that. Part number is M1530USB/DC and it is available at multiple places for around $20. For instructions on how to fix it, check [http://www.youtube.com/watch?v=WnbGyh8apU4|on here] or download the service manual for your computer [ftp://ftp.dell.com/Manuals/all-products/esuprt_laptop/esuprt_xps_laptop/xps-m1530_service%20manual_en-us.pdf|from here.]Hope this helps, good luck.