HyperDeck Power Issue

I have an issue with my original HyperDeck (the one with 2 SSD but no SD Card). It seems to work well but after maybe 30 minutes or so of recording, it turns off just like if I have unplugged it. And there is no way to turn it back on, except unplugging it, waiting a few minutes and plugging it back. The fuse is ok and the device is in a permanent rackmount (it doen't move).

Any tips?

Thanks!

How are you powering it? Is the PSU over heating? Is the unit itself overheating?