for resolve "to service" you must remove mechanims complete and remove clyinder unit with 3 screw under the mechanims and one silver screw inside for head connector.open a small screw on clyinder connector and remove the clyinder connector from unit with carefully.you will see a small connector inside the clyinder unit with 10 pins(there are 5 pins up and 5 pins down of the connector)you have to soldering this 10 pins with a attenuate layer of iron solder.because there is a lose connection in this socket with clyinder connector.
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