https://github.com/bigtreetech/BIGTREET … iagram.jpg

HMM look to be in the proper order. fyi this is the same board used on the current FT 6 kits.
a 32 bit smoothie board.

Well, a month later, I'm back.  I bought a board, been sitting on the desk for 3 weeks.  It uses different connectors than the SD board - JST vs JST XH.  So I bought a kit, hafta rewire the connectors.  Now comes the problem.  The  pin outs on the new board are labeled 1B 1A 2A 2B (in that order)with the common (square solder pad) under the 1B.  The SD has no labels, but the common lug is in position 4.  I have attached a couple of pics in the hopes that someone can identify the pin outs and/or wire colors.

Any help here is greatly appreciated...

Stepper Motors

A4982 Driver Pin          LP      Pkg Pin Name          Phase          Header Pin
        22                                 OUT2B                        Phase 2-     1 (the square one on the PCB)
        19                                 OUT2A                        Phase 2+     2
        18                                 OUT1A                        Phase 1+     3
        15                                 OUT1B                        Phase 1-     4

https://reprap.org/wiki/Printrboard

Just Google solidoodle board rev e schematic next time.

Any help here is greatly appreciated...

https://ultimachine.com/

My Rumbas (two of them) are still going strong - they are the genuine article tho, not knockoffs.
One did have a hiccup with the USB chip - apparently they got a bad batch back then - but that has long since been sorted out.
the connectors from the printrboard are not compatible with Rumba - however, for the motors, you don't even need connectors - they have screw terminals available. you would only need to worry about endstops and thermistors.

the only one I personally know of that might be compatible with the printrboard connectors would be the MKS Gen1.4 - it is also an all in one Ramps derivative, like the Rumba is, but not quite as robust... Not a bad board, but of the 2, I would still prefer a genuine Rumba

this is definitely a board issue - most likely the USB chip, since that is how things run to/from RH.
the USB is what died on my SD4 way back when, too..

I, personally, went with Rumba for board replacement, but there are many other options out there. far more now than there were when I did mine 4 years ago.

If you can screen grab the log from RH when trying to boot it up that would be great

The fans stay running, but that is about it.  RH sees and 'connects' to the SD, but nothing works - no movement X, Y or Z, no heating, in fact, the extruder powers on for less that 3 seconds and powers off.  The bed does nothing for heat...  I took a screen shot if someone can figure anything from that.  It throws a couple of errors at boot, but I can't decipher them.  I'm back to I think the MB is just taking up space. 
Any help greatly appreciated
Thanx
Ski

Carl - You are probably right, although I show 12+VDC at numerous places, there is probably little or no amperage. 

So....... I'm off to find the least expensive SuperNight 360W PS.  I'll start there.  I have had a good time with the SD, and just can't let it go, taught me a LOT. 

I'll be back in a few days with a new PS and prob more probs...

Thanx
Ski

for a budget friendly, easy to set up board, take a look at the MKS Gen 1.4 - should even be able to use the existing wiring connectors on it.
board itself should be around $35 (give or take) and you will need to add stepper drivers  - personal choice would be 4988s for X, Y & Z, and an 8825 for E - but you get whatever you like.

As for a board that is really the only thing that makes one printer different from another. They hardware is all the same so you could use any board you want, it's up to you and your budget.