Ok, in that case the flashing blue & red is the error code that need deciphering. I've not got the details to hand on which error this is, but perhaps Doughty has???
If You don't get anywhere with this error on here, then the speedo will probably have to go back to the importers (SMD) via the hobby shop you originally purchased the unit through (assuming it was in the UK). You'll also need the reciept.
HTH
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