Tajima Not Stitching

Am a Newbie in Embroidery biz with a 90’s Tajima TME HC 906 that runs with an external USB adaptor . Unfortunately I cannot get the machine to stitch properly as every design loaded on the machine stitches like a straight line and runs out of frame in the X-direction.
So far I have checked the motor and the x & Y axis board both of which seems to be okay. All help/advice will be greatly appreciated.
:confused: ADE

Location: 
United States