Differential encoder hard crashes the PC MESA7i77

No, I was just setting up. I have a couple toggle switches working on gpio but that’s it. I was just getting excited I could see it talking through halshow. No servo/spindle drivers yet.
I figured the MPGs should have been the next easiest thing to do

Well, I found a pile of old Dell Optiplex machines for cheap. Im just gonna try a new computer.
I really wish i could have found a way to make the Asus A520M work. Looks like a tough board good for machining environments.

Ill keep everyone posted if the new computer(s) work out

Ok guys, 

• got a totally new PC (dell optiplex 5050)
• install a completely new image of linuxCNC
• put the 6i25 board in 
• The LSPCI command seems to find the board and the daym mesaflash still cant find the board!The PC is not hooked up to anything but power and internet. 
• Mesaflash is up to date...according to the Synaptic manager....(3.4.9)

 

what in the name of the gods am i doing wrong???? Please help

Take pictures of both cards and post them here, do not touch the jumpers.
Did you y any chance set them to "setup mode" or something like that? been to long so i am a bit fuzzy....

Again the memory area is disabled, you might try the setpci option

Also, if Linux runs and accesses the card, you may be able to bypass the mesaflash issue with:

sudo mesaflash --recover --device recover  --write 5i25_7i77x2.bit

PCW: no luck on the setpci option:

 

here are the pictures. the one with the white folding table background is the old one.   

Thank you. I am starting to feel like I really must have missed something obvious here...

OK guys, 
Finally back on this again. Got LinuxCNC stable, ended up being a failing hard drive issue. Got my 6i25 and 7i77 boards back from MESA, everything checked out ok. 
I am still struggling on the MPGs. Still crashes the computer when I scroll the MPG handwheel. Its a differential encoder, plugged into encoder #3 slot on the 7i77. I have tried a new MPG, same result. I would say its safe to say the MPG hardware is not the issue. 

Can you power the 7I77 from an external 5V supply?

When you say crash, what actually happens?


 

  When I say crash, I mean the computer shuts down and reboots.

The 7i77 is powered by an external 5vdc supply. Here are some pictures of the wiring 


I am getting 5vdc between the screw labeled vcc and 0vdc. Interestingly, I can start LinuxCNC with the encoder hooked up and it will not crash unless I move the hand wheel. I used halshow to verify other buttons are working (joystick, start, stop, etc.)

power supply for 7i77 is 15w/2.4 amp