Hi Robin57159, thanks for your reply.
The power supply that is supplying the led matrix is a 4.5volt 40amp switchmode PSU:
This power supply connects directly to each panel using the three white plugs via the red&black cables. This was the supply that came with the three panels, along with its HD-D15 driver board, which works [but i don’t like it :)]
The raspberry Pi is being powered from a 5v 3amp USB power supply.
The Adafruit hat was running from a 5v 1amp supply via the DC input socket on-board (note: i dont know if this supply has to be the same as led matrix supply or not, i didnt try that but I can)
Just to be clear, the pi doesnt reboot or brownout. it sporadically pops up with a dialog box asking me if i would like to logout, which is weird. I can click cancel and return to my command terminal, but from that point forward commands i type dont make any changes to the led matrix.
Thanks again.
