Hello all,
Can anyone share some tips on how to solder ground pins on the router. I mean those serial port pins which are marked with dotted circle on the PCB. The problem is that soldering metal just don't want to stick to it. There is no problem with other pins and soldering them are very fast and smooth, but not the ground pin. I've searched the internet and found that this is common problem, but still didn't find good tips on how to solder them. So maybe some of you can share the ideas of soldering ground pins.