Simon Royal <mail at simonroyal.co.uk> asked: >So my question is, can I put a 550Mhz logic board into my 400Mhz >machine? If not why not? Nope, completely different chassis, bits won't line up right, too many internal differences. You _could_ swap your complete display onto a later chassis if you happened on a complete lower section, but that's about the only way to re-utilize what you've already got. Sorry. dan k ................................. macdan at comcast dot net http://macdan.n3.net/ carracho://dankephoto.dhs.org hotline://dankephoto.dhs.org:9500 .................................