BigNG vs Insect

After four months of running our fan controller suddenly stopped responding in RTS2. Direct serial communication produced nothing either. Getting frustrated I took it from the dome to campus to work on it. By chance I happen to inspect it and noticed corrosion on some if the ICs.

On the lower left black chip the corrosion is the worse. Several pins on the IC are simply gone. This chip happens to be the USB controller hence the bad USB communication. There was some bug poo on the IC chips themselves that I scrapped before taking picture. Next fan controller I will put in an enclosure to prevent this.