Hi, I've tried several of the led replacements, but so far they all cause the error message! You can of cause install resistors but I can't be bothered with that. I've settled for zeon white replacement filliment bulbs (£6.00 a pair, eBay) they have the blue coating but shine white and look good. They are a wedge type bulb 580 quite easy to replace. Either take front wheel off or just turn inward, undo the 2 plastic screws, remove the cover, (pliers handy at this point) gently grip the light plug and rotate anticlockwise I think? Pull out the plug (only gas very short wires) hold plug firmly with one hand and pull bulb out with other. Replace new bulb and reverse fit.....