It is unfortunate to hear about you experience.
It is difficult to estimate what could have caused the malfunction, but the PSU itself could be tested, whether it supplies a stable output voltage between 9-30 VDC and does not overheat while doing so.
Maybe some unexpected surges or outages have occurred recently?
There is a recovery procedure described here, but it only applies if the issue is on a software level. If It is a hardware failure, you should return the device.