pls tell us more what happened? did all cards died? do you have burned chips or what?
if you observe temps of asic chips i dont see problem overclocking.
i think other asic miner componenets are more at risk due increased temps because only chips have heatsinks. as well power supply must be decent.
anyway all chips and cards shouldn't die at once. if miner doesnt see any cards i would guess it's voltage regulator issue.