hi , it's simple : follow the lines on the motherboard for the broken pin's.
or , take a look at #6 post here :
take pictures of your broken's pins before and after soldering , perhaps it will motivate some ppl to do the same , because this issue is known now and sadlly it's a comon issue.
edit : @megaestman have you solved your problem ?
i hope so.
i'm back again. Unfortunately I'm still stuck. I had put the switch aside for a couple weeks but now i'm back at it since we're all in quarantine and stuff...
Finally ran Hekate on it like you recommended and tried to do a backup. I was greeted with this error...
So...although i can load into SX OS, backup NAND to SD, and launch hekate payload, there is definitely something about the SD card reader it does not like. Perhaps it's the soldering as you pointed out. At this point I'm just kind of over it and on the lookout for a used or refurbished unit, but any further suggestions are welcome. Thanks again!