Zoom MRS1608 schematic request

I am having a lot of hour web crawling logged up trying to find a schematic for a Zoom MRS1608 home recording studio. The problem is:

I have a zoom mrs1608 hard disk recording studio, which when last turned on came up with a blank screen. *I am getting, power from the psu at normal voltages and also voltages to the main board with normal voltage readings from most of the IC's that I could find data on, but the fault is, as well as having a blank illuminated screen, if I disconnect the IDE cable from the hdd and cdrw the disks will both start, but obviously there is no further action from the unit. *I have tried a new hdd but as soon as I connect the hdd ribbon back to the main board , no drives boot up and although the display is illuminated, the unit still fails to boot up. *Is there an ic buffer before the IDE port on the main board that would prevent reboot. *Can I obtain a schematic from anyone who may have one or help me along the way if you are not allowed to give away a schematic service manual

Kind regards