How to best secure Mobo to Daughter board

GhaleonUnlimited

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So my MKII ROM board won't stay on the main board, slips off when I move the machines for an event (I have the board mounted inside the machine, but I move the cabs on their back and it slips off).

Also, my Mach Breakers ROM board is having a hard time making a 100% connection w the mobo, usually resulting in garbled graphics . If I reseat it perfectly , it's fine.

What are safe ways to secure/sandwich 2 boards together that are having this problem?

For my Breakers , one of the boards looks slightly bent . Should I reflow the pins on both sides of the connectors ? What else to do?

Pics 1 and 2 are the MKII. Pins are a little bent from the rom board falling off a few times.

In Pic 4, I took a blurry Pic but the boards are not making a 100% tight, squishy connection after I put them together, they separate a bit.
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Looks like there are mounting holes present that line up on mobo and sub board. Get some nylon or steel standoffs and then you will be able to screw it down without fear of it moving. You can also use nylon push fit standoffs similar to what is already present from factory. Just add some more of them.
 
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