I took out the old capacitor and didn't remember to check the polarity because I assumed the board would have more standard markings. Is there any way to figure it out with a meter or by the printing?
Electronic – Identifying polarity of capacitor from PCB printing
electrolytic-capacitorpolarity
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Best Answer
The pin on the left is connected to the large power plane, the next task is to figure out if it's positive or negative with respect to the other pin, since the HC125 is connected to it, it would be the ground plane, but if the board has multiple voltages, you may have dig a bit more. If the right pin is connected to pin 14 of the HC125 then it would be positive wrt the ground plane connection.