I wonder if you have reset the digiboard from the error condition? As you know how to get into the diagnostics programme, do so and as it cycles, press buttons 2 + 4 (reading from the left) together. After a few seconds you should get "E00". Restarting the machine should get you going again. If not, help required. Use the Directories section, or at least check with your repairer as to whether they are up to speed with this range of machines. Either way, tell them to sign up to UKW!
Which bit of "Unplug it" is causing the problem?
Stop eMailing me. This is a perfectly good forum - use it!