A2630 Rev 9 CPU Clock Module (Oscilator)

[Oli_hd]

Yeah your crystal should be just fine, as should the 16Mhz one though (Although I guess you could get memory refresh problems)
Have you checked if all the jumpers are correct?
there is one for memory size, what OS your booting and some others.
Any missing chips or anything?
Have you tried removing the 68000 off your A2000 board? (Only needed in german A2000's but you can do it to any A2000)

[Oli_hd]

How could a 16mhz OSC give the 25mhz processor what it needs?

Simple, it would run at 16Mhz, the whole board would clock at the same speed (if any of the PAL's actually use the system clock, I have the service manual and user manual so I could have a look) and you can underclock a CPU the same wasy as you can overclock one.
It wont give you 25Mhz though.

[Oli_hd]

hehe, strange problem you have there.
I wonder where the CPU is getting that 7Mhz signal from... any wires running from inside the shield to the edge connector? What does the crystal say on it? (7Mhz?)