Printer won't work again

In May 2015 had problems where the axes would home, heaters worked OK but axes would not move using the Buttons on the Repetier Manual Control tab.The problem mysteriously disappeared.

Since then I have made several hundred prints without difficulty but it has now failed again even worse. Axes home, fan works but buttons won’t move axes and now heaters don’t work. This with Repetier 086 on Win7 and 1-0-5 on Win10. Both of which printed OK until recently.

AS a last desperate throw I tried to reflash the firmware. Following Velleman instructions downloaded Arduino 1-0-6 but no sign of a firmware file in the ‘open’ drop down menu. (also tried Arduino 1-0-4) Couldn’t find the Marlin.ino file elsewhere even if I knew which version to use.

Anyone any ideas?