I recently got a second hand V5 Zynthian (with RPi4), partly because I wanted to test out the new form factor alongside my V4, and partly because it was at a good price. It’s an absolute beautiful piece of kit, and the RGB illuminated buttons really look great. I still find my V4 faster to work with though, perhaps because I’m more used to it, but also I think because it takes a while to move my hand between the knobs and buttons on the V5, whereas the V4 is more compact.
Occasionally though, when I power on the V5 Zynthian, the screen refuses to light up and it doesn’t seem to be responsive to touch either. Zynthian is still alive, because if I press and hold the Opt / Admin button (which normally brings up Power Off - Are you sure), and then press Sel / Yes, it powers down and next time I power it up it works again. This seems to happen maybe once out of 25 startups (haven’t really kept count).
It feels more like a software than hardware issue; apart from this the V5 is rock solid. Is this a known problem with some early V5 hardware version?