this post was submitted on 04 Jul 2023
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Those leftover solder “blobs” are quite usual on raspberry. Better than pure chinesium quality though.
The small marks are just on the PCB’s clearcoat and will not matter electronically.
Just test it out. You can boot from USB without a sd card with PI4 ;)
Can I/Should I just scrape off the leftover blobs?
I didn't know I could boot from USB, thats cool. If It's booting to bootloader it's probably fine though right? I'm replacing an existing 2GB anyway so I'll see soon enough.
I would scrape them off without using much force. Otherwise they can come loose on a worst time possible and maybe short circuit some pins when the board is powered. Probably will never happen if the raspberry is statically mounted somewhere, but you never know when you are going to drop it while powered.
P.S If you are going to run some servers/services off the raspberry do not use regular usb sticks or sd cards. Get a USB ssd or USB to sata or M2 adapter. Some write intensive applications burn through quality sd cards/usb sticks within a year
This Pi will just be a router, later I will run some DB stuff though so I'll get an SSD. I have another Pi I do some intensive Data stuff with and I have a sata SSD for that one.