This is a preowned item. It will usually reset and work again. This is a querk of this model and not a fault. Its makes it safer to use but can be annoying. Doubleho Model Railways.
Hornby R8250 Standard Train Controller with Power Supply
Two Hornby R8250 Standard Train Controller With track part
Hornby Standard Train Controller (R8250) - P9000w Used With Plug
Hornby Standard Train Controller (R8250) - P9000w New With Plug