I had similar failure problems with other electronic equipment in my house several years ago. The electric power utility was to blame ... many voltage spikes and frequency irregularities were discovered when I purchased a line monitor. They've since corrected the problems. You may wish to contact your local utility for a check. A surge protector or UPS may make a difference, too. Good luck!
These problems shouldn't have any effect on the RB, as it is run off a totally (double insulated) isolated 5v supply off the USB from a computer.