BAFFLED! Dishwasher won't drain (not blocked / drain pump won't run during cycle but runs on bench)

[reubin78]

Beko DW603 dishwasher

Drain pump not running during/after cycle:

• During cycle, water seen draining from two overflow pipes (located by front feet)
• Drain pump does not run between washes/rinses.

Checked:

• Inlet and outlet for blockages
• Checked other pipe connections and for blockages
• Ran drain pump on bench (runs fine and resistance felt against vanes)
• Small flap on outlet side of drain pump housing is intact/moving correctly.

Has ran fine for 3.5 years until suddenly not draining. Even checked that its level!!

Your thoughts - please

Is the most likely candidate a faulty main circuit board?

Ps, disconnecting the pump then adding direct power, results in the residual water being drained.