Yeah, this one's common and usually not a break. It's the Auto-Off feature.
DIAGNOSIS: To save energy, the brewer automatically turns off 90 seconds after the last brew.
FIX: Just press the power button again to restart it. That's it. It's a feature, not a malfunction.
IF THAT DIDN'T WORK: If it's shutting off during a brew or immediately, the electric circuit might be overloaded. Plug the brewer into its own grounded outlet, not shared with other appliances.