I've been having phantom issues with my QNAP TVS-672XT since I bought it back in 2019. It would randomly restart or shutdown completely with no warning. After talking with support it was suggested that the issue might be the Samsung 970 EVO 1TB M.2 NVME SSDs I had in the unit, so I tried removing them and the rebooting issued ceased. I sent the memory into Samsung and after testing them they said there was no problem with them. I've since been using them in another system with no troubles.
Cut forward a few years and the TVS-672XT had been running fine until last week when the NAS became inaccessible and the the buttons on the front of the unit were unresponsive. I did a 10 second power button reset which restarted the unit. After a file system check everything was running smoothly. Last night I shut the unit down via the web console to do some audio recording and this morning when I went to restart it the power button was not responding.
Here's everything I've observed:
- After pressing the power button, the fans and drives do not spin up and the LCD on the front of the device does not light up.
- The unit is warm to the touch (it's not hot at all, but noticeably warmer than the room)
- Upon removing the cover I can see a red LED on the MB around where the CPU blowers are. This turns on the moment I plug the power cable in and turns off when I remove the power cable.
- Unplugged the unit and plugging it into another UPS
- Swapped out the power cable
- Removed the drives and tried powering it on
- Removed the PSU and tested the both the motherboard connectors and drive connectors with a multimeter they all show a steady 3, 5, or 12 volts (followed the instructions here: https://www.youtube.com/watch?v=UDj3Wp03O0w)