I have recently got a new motherboard and PSU and when I turned on the computer I recieved the message " DISK BOOT FAILURE INSERT SYSTEM DISK AND PRESS ENTER " ... I have not been able to access the HD so nothing has changed. The same message appears when I have nothing but power, screen and keyboard plugged in. When I insert the Windows disk it get to the part where it would do repair or install but then says taht it is not connected properly or the power is not in properly.... I can feel the heat on it which would suggest that it does get power and all the IDE cables are firmly in.. Can anybody help?