I don't know if anyone has had a similar problem... my O gauge Dapol autocoach (lightbar fitted for DCC) saloon lights have stopped working, and the drivers cabin light now work on F7, not F2 as it originally did. I fear I may have corrupted the chip ( a Gaugemaster DCC27 according to DCC Supplies, who incidentally I find much more helpful than Dapol) when trying to change the loco address, but I'm finding it impossible to reset the decoder. Any ideas anyone?