Just for anyone who may be interested if they're having problems with their Honda Accord 7th generation clock & temperature display. About three weeks ago I re-soldered mine by following the helpful information on this forum. But today the screen went black again. So I removed the unit to check the pins that I had soldered and they were okay, but noticed that there was a lot of crystallisation around the pins and on the circuit board, and it seems I hadn't cleaned the flux off properly. I used a small soft brush and Isopropyl and it cleaned it off very well. I refitted it and now it's working fine again.