Thanks GND and Clive S. Yeah that will be handy if the chip is socketed, im crap at soldering to be fair. I think they are just bolted together with small bolts with thermal compund between the heatsink. I have a tube of MX4 Processor compound from building PC's so im thinking that would work.

That chip definately is the one leading to the X axis output with the problem so i will replace it and see if that fixes it. There is one on ebay available from the uk but it is missing the Q designation at the end so not sure if it would be ok TA8435H rather than TA8435HQ. I will order one of the ones Clive suggested but might be a little wait for that one to arrive.

regards
Adam