my smiths electric speedo doesnt work ,well the speedo it self works but the lcd odometer display doesnt show anything ,its just blank .its the one with the adjustment on the front .
any ideas ?
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Thats an ETB not a Smiths.

Try their very good website here Clicky

Their technical helpdesk is also very useful, TOP TIP have certain info to hand, diff ratios, wheel & tyre sizes before calling.