I need help. I bought a power mac 7500 with a 200mhz 604e card in it, and an ATI Mach 64 video card. I hooked it up, turned it on and there was no video. The HD didn't seem to spin into the OS either. So I took out the processor card and put in the factory 100mhz one, and i also took out the mach 64 card, still no dice. I switched out the HD into a factory 7500 and it came on but the screen was discolored and 2 bars of color followed the mouse. Any ideas?