Hi Glenn
If your keyboard is working I would double check the BIOS settings for the 300 MHz board. They can be found here
http://www.mackie.com/support/documents/D8B300MHzBiosSettings.pdf These are the settings for the newer 300MHz Mobo of course. What else?... it is possible that the 5-pin DIN adapter has gone south... Although not confirmed by myself I believe this is the pin out --- see "5-pin DIN connector" on this page...
http://www.zytrax.com/tech/pc/din.htm... Trying to think of what I know about this... I have a newer 300 MHz CPU that is likely to go up on E-bay/Craigslist/Trading thread shortly because I bought it as a backup and I haven't had any problems at all. (and I need the money for another cool reverb box, or food… whatever) I bought this CPU at the time of the DXB Motherboard fiasco if you remember that, so I wanted to have a spare at the ready. Also I had heard, like you recently learned, that the power supply units can fail and they are difficult to obtain. Well, Because of this, I was able to purchase a back-up for my d8b set up. I am finding that I really don't need it and it has the upgrades and everything. This and because I have seriously downsized my work space and simply do not have the amount of space I use to have so I need to simplify the little rented space that I do have and make the best of it. I could go on and rant about how awful it is and how cramped I feel and ...and ... and ... but I choose to remain grateful for what I do have and that is a lot. Do I miss my old studio? Yep I do - it's still sitting there empty being used to store the summer chairs. How about that? A $20,000 room does make for a great sounding isolated “storage” room... don't get me started - oh... I already have? damn!
Whatever... my point is this, this CPU every so often and it is quite rare that it happens, --- btw. I have heard this from other users too--- , but every so often the mouse input jack acts up and needs to be fiddled with. When it gets to the sweet spot it works. I really do not know what it is, a open receptacle that doesn't make good contact, a connection where it meets the motherboard, the adapter... ??? I really have not figured it out. But like I say very random and not hardly ever at all, but it does happen. I get keyboard but no mouse. The arrow just sits there in the middle and does nothing at all. I have sprayed contact cleaner in there. Trying to think of what else, make sure that “load last session at startup” is NOT checked… firmly reconnect the Big connector at the back of the mixing console. Wow, this is a long one… it could be any number of things – For the record, when my d8b doesn’t boot up at 100%, albeit a rare occurrence, it really is a drag.
Hope this helps,
Michael