Some Direction and Advice Needed - Qnap NAS Not Booting

Hello All….

I have a QNAP TS-419P+…YES…I know its an old one, but it was serving my purpose really well, so I was fine with it. It was configured with 4x 2TB HDDs as RAID5.

I walked in today…and without warning the unit was going into a perpetual boot cycle…attempting to boot. It would…whir up…fail..try again..whir up…fail..try again…and so on. I had to pull the power to power it down.

I immediately suspected the power supply brick as I could hear it whining and buzzing…but I just am not sure. Here is what I tried…

• Took out all the HDDs and put them away…

• Powered the unit on with no HDDs
  ** QNAPs Qfinder Pro tool on my PC was able to find the unit, but complained and wouldnt log me on as there were no HDDs

• Next I tried a spare 2.5" HDD in each NAS Slot
  ** Slot 1 and 2…went back to boot cycling as described
  ** Slot 3….this did allow me to boot the unit….Just!!
  ** Slot 4…went further with the boot process, but eventually cycled back…

• Next I tried a spare 3.5" HDD in each NAS Slot
  ** Slot 1 and 2…went back to boot cycling as described
  ** Slot 3 and 4…went further with the boot process, but eventually cycled back…

When the unit did boot with the 2.5" HDD QFinder Pro found the unit and it seemed to be showing the right firmware…(QTS 4.3.3.2784). This can also be seen on the front panel…yet when I tried to login, its telling me to install firmware. I have no idea why this would be the case!! Happy to hear some ideas!!

Throughout this testing, the power brick was whining and buzzing…and the noise would change…and the power brick LED would dim when the unit power cycled.
Of note…the power supply brick is whining/buzzing a lot which I dont belive it had been doing.

I strongly suspect there is a power issue here…but I wanted to see if this community could offer some thoughts or advice. Not really sure where to turn after this!

Thank you All…

Stulte.