Without proper air flow, your PC can lock up, reboot, and do other seemingly odd things. This weekend, my CPU heatsink / fan combo motor shuffled off its mortal coil. It last spun at 11:30 this morning. I called around town, looking for the best on-site prices and schedules. Wound up going with SpeedyTech. Within two hours, I was back up and running – for less than $125 (quality parts and labor). Any other doorstop-tech recommendations for LA?