Just wanted to say that I also had the same problem... for the second time in a year. The first time I had no idea where to start, called a local engineer, he couldn't fix it as he didn't have spares. Then ended up spending £175 on a year's extended plan, and the Beko engineer came and replaced the board. When it failed again this year I thought of replacing the board myself. Came across this discussion...bob12241 You're an absolute star! From £175, the cost of the repair this time went down to £1.75 for a new diode!
Thank you!