hello guys
i,ve had an intermittant problem with a mitsi fg20 gas truck. every 3 to 4 months the hydraulics start playing up. they wont work some days at all. somedays only tilt works. otherdays no problems at all.. the warning light on the display sometimes flashes and sometimes on solid. i,ve tried swapping joysticks round to see if the fault moves but no success. i know about the flashing led in the box but can anybody get me info to work out where the fault lies

reards
kk