I went through this a few times. Here's what I did, assuming a Rep1,
and only the mightyboard:
1. Make sure the power is turned off on your Replicator. (if the switch
is in the on position you can get sparking when you plug in the cable,
sometimes)
2. Unplug the power cable from the back of the box.
3. Remove the bottom panel. The one underneath.
3. Label all the wire sets that are connecting to the board so we can
easily tell which set is which.
4. Take some pictures of your existing board. Pay particular attention
to any place where wires are connected to the board. This is your
backup to make sure you reconnect things properly. Don't skimp on this
- it only leads to issues later, like swapped extruders or cooling fans,
or reversed cables.
5. Take proper anti-static precautions!
6. Disconnect all the wires connecting to the board.
7. There are 4 or 5 clips holding the mother board to the case. Use
needle nose pliers to pinch the tops of these while gently pulling up on
the board. Don't force it, the board will kind of pop past the clip - at
that point, move onto the next clip.
8. When all the clips are loose, you can remove the old board and set it
aside, toss it, or use it for target practice. (If your regulator went
I think everything on the board is suspect and likely damaged beyond
repair.) But, um, wait until AFTER the new board is in and running
before going wild with the old one.
9. Reverse the process with the new board. Line it up over the clips
and gently push down until the clips are all secure.
10. Use the pictures you took, and your labelled wires to carefully
re-attach everything.
- For the fans, check how the mechanism works on the old board for
attaching the wires. I was bringing the thing ALL the way down, then
when I would tighten it, the wires would pull right out. Turns out
there is a box that should be centered and your wires go in the middle.
Then when I tightened it up, things worked much better and the wires
stayed.
11. Give a gentle tug on all the wires to make sure they are properly
secured.
12. Plug in your power.
Now, if you've done the right prayers and incantations, made the right
sacrifices, and ensured all the stars are properly aligned, when you
power things back up you should be good to go. You'll have to go
through the initial setup routine again - my experience says to be
patient and don't rush it. You can make adjustments AFTER the routine
is done. You'll likely have to also specify that you have dual
extruders (if you do) - mine defaulted to a single extruder.
Obviously, I'm offering no guarantees for these instructions - they are
all from memory. But, the process really is quite simple. Just a
little time consuming. If you've also fixed the issue that caused the
blown board in the first place, you shouldn't have any trouble getting
up and running again. Be aware though that you might go through
multiple boards before it stabilizes.
Hope that helps.
Shawn