LAN9514 (Raspberry Pi)

The LAN9514 is a chip that is found in the following Raspberry Pi models:


 * Raspberry Pi 1 (B+)
 * Raspberry Pi 2 (all)
 * Raspberry Pi 3 (model B only)

The chip provides a four-port USB hub as well as ethernet functionality. It interfaces with the Pi's CPU via an internal USB connection.

Before soldering in a new chip

 * Measure the resistance between ground and the  pad as well as the   pad. The resistance should be about 1M in both cases. If the resistance is way smaller (e.g. 80), the Pi's CPU is broken, and soldering in a new chip won't solve the issue.