You guys should know the first rule of electronics by now

If it don't work switch it off count to ten and then switch back on if it still don't work then it has a problem

Bizarely this also works when the caterham 7 doesn't start flick the master switch and then turn it back on and it normally starts
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P.Allison fixer of big engines Mk2+Mk2a signed by God / Hacked by the Lord Aberdeen Scotland