Fault finding for display not working on water softener Electrical Advice

Fault finding for display not working on water softener Discussion ThreadFault finding for display not working on water softener Electrical Advice

Hi everyone. I'm not sure how this works but if anyone is able to help point me in the right direction that would be great. I've got a Monarch water softener and the display isn't working. When I turn on the power it shows just a blue screen. When I press the buttons I hear a beeping noise and the machine starts regenerating, so clearly power is going to the display in some form. I've checked all the connections and they seem fine. It was working fine a couple of months ago but was unplugged for a bathroom refurb and has been stored safely. So I was wondering how I might fault find to find which part is faulty? I've got a multimeter and the basics of electronics. Monarch charge £144 for an engineer to come out but parts are still covered under warranty so if I can find out what part is at fault then I should get a free replacement. I've attached a couple of pics. Many thanks in advance. Ollie





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