Alpha Evoke 28 won't turn back on

[lesyork]

Hiya,

Had some potential power funnies today (or not? unsure) and the hot water demand stopped working on our Alpha Evoke 28

Currently set up as OpenTherm with a Nest Thermo E

Tried turning the boiler off on its front panel (holding down the power button for 8 seconds) - has gone to its 'dot' display showing it's on, but I cannot get it to turn back on (to standby or any other mode)

Have tried holding the power button down to no avail - have also removed the OpenTherm connection to see if that was blocking it

Any ideas?

 

[lesyork]

Managed to get it back on after some pressing of the power button! (circa 3 secs)