Hi,
the A3000T has -- as the desktop-model -- an onboard CPU and FPU, so you don't need a processor card.
Does the power-LED comes bright, i.e. during a reset the LED is less bright until the system has performed some internal tests than -- just before the boot-process starts -- the LED gets bright. If it doesn't get bright, you have a hardware problem as a defect CPU or any other chip. If it gets bright the system may only have a defect video-output, in that case the floppy drive should "click" and you may insert a disk and boot the Amiga (the drive should start spinning and reading the floppy).
Noster
