Mining gears are not like Pentium or AMD or xion servers, they do need baby sitting to make sure they run at optimum condition and time to time, you have to power cycle. When you see sign of problems, fix them and intervene before further damages are done!!!
If you travel a lot, and want to make sure your mining operation at home is taking place, may want to have some webcam, networkable smoke detectors (heat sensors) and networkable PDU and VPN to access your miner's web control panel for the safe operation!
Another board stopped today. Down to 2.6GH
Like mentioned mining can require a little more attention. It's nothing compared to the time I spent babysitting during GPU days. But 2 weeks is a while unless you have it VERY VERY fine tuned.
Do you have access to log in to miners? When you restart miner does it go back to working or is the hashing board not coming back no matter what?
(If going to be gone for weeks might look at M's program to watch ant miners it can do a lot of things automatically).