A3000 + a3640 = keyboard issues

[heymanj]

Howdy,

I've been the owner of an 16MHz A3000 desktop for many years (bought used in 1995 after I had issues adding the 2.04 ROM to my original A1000).  It's been expanded with an A2065 (Ethernet), a DKB128 (128MB of SIMM memory), a ULowell graphics card (not used), as well as several scsi drives.  The thing I've always wanted to do is put an a3640 (25MHz 68040) in it.

I've recently purchased said a3640 on eBay - version 3.1.  After changing all the necessary jumpers on the motherboard, I booted the box.  Everything came up roses, until I tried to enter my userid/passwd for Genesis TCPIP (I have that in my initial startup).  I was able to type the first two characters of my userid and then the keyboard refused any more input and kept sending the 2nd character repeatedly thru.

Mouse still works fine, so I've been able to run gui based apps to see that the a3640 is recognized, but am unable to type anything in  :-(

The keyboard was usable prior to the upgrade, and is on a KVM where it is successfully working with a p3 based system.

I have not reset the A3000 back to 16MHz to retest the keyboard because taking the a3640 out requires complete disassembly - and would rather avoid that if I can...

Any thoughts/suggestions :-?

Thanks!

jerry
       //  Jerry Heyman      | "Software is the difference between
      //   Amiga Forever :-) |  hardware and reality"
  \\ //    heymanj@acm.org   |
   \X/     http://bellsouthpwp.net/h/e/heymanj/

[heymanj]

Many thanks for the suggestions.  Not looking forward to taking it all apart again, I tried the easiest suggestion - taking the A3000 off the KVM.  Bingo!  Solved the problem.

Now I only will have two keyboards, two mice, and one monitor on my desk :-) :-(

As for the heat generated by the accelerator, I was thinking of buying a case fan, hooking it up to the spare 4pin power adapter (only have one drive in the machine), and trying to rig it to blow across the accelerator.  I am definitely open to suggestions as ya'll obviously have much more experience with this than I do.

Thanks again!

jerry
       //  Jerry Heyman      | "Software is the difference between
      //   Amiga Forever :-) |  hardware and reality"
  \\ //    heymanj@acm.org   |
   \X/     http://bellsouthpwp.net/h/e/heymanj/

[heymanj]

motrucker wrote:
Put a real CPU fan on it! It will make a huge difference! The case fan will make little if any difference in cooling the '040 - these things get HOT.

Got any recommendations?  I know that there isn't much clearance/room for a CPU fan, and I'll probably have to find one that uses paste to hold it on - I didn't notice the ability to clip on a CPU fan.

jerry