I used to repair these my self if you remove the back plate with a sharp blade once removed if you look directly in the centre of the circuit board you will see the solder will be worn away just stick a blob of solder on it. I used do a lot of these and had a good success rate.
all the best ryan
Message Thread 
Vauxhall Astra 1.7 DTi 2001 - EDU unit on the back of injection pump - Fixed # - Ian Waring December 21, 2014, 6:31 pm
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