Can someone help us? About a week ago my son was able to open a garage but it was slow like it was running on a battery. Than I could not close it at all. No sounds, no movements on a motor side. 5 flashes. We have HD900D model. Since we have a home warranty we arranged an appointment and they told us it's a burned transformer and not a normal wear and tear and they do not cover it. We just bought and tried to install a new transformer but it did not work either. Both transformers give an input 120v and output 6v instead of 24. Circuit board looks fine. What can it be?