I have got a sound modul - EX5R. It has worked well for 2 years. But now there are some problems with it. When it is
switched on, there is nothing showed on its LCD, except the full yellow. All the button lights on the EX5R's font panel are turn
on once every 3 seconds. All the keys function don't work. I don't know what happened with it. I'm wondering if you could
help me. Please reply me as soon as possible.
I'm looking forward to hearing you.
Thank you very much.
Sincerely.