Dishwasher AEG not working (SN1 old town swindon)

AEG Dishwasher for spares repair, £699 in 2016 (i got it JL outlet for £325) . Its top range dead clever does top at 40° bottom at 70° and the super spinny bottom thing . Very sad to see it go. It also did hot fill so cheap to run.
all mechanical bits work . It starts up says aeg then screen goes blank. Google says main control board £120. Had a new heater and drain pump . .
You can get guaranteed repair by AEG for £169 (I used that for our washing machine they replaced every board !) Happy for trades person to have for parts or fix

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