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- Solder won't stick 4 answers
I know that this is a duplicate question, but I have read the other posts and tried the answers but none of them work. I have tried more heat, less heat, medium heat and even holding the iron to the same spot for two full minutes and it still wouldn’t stick. My solder has resin and plates on the pcb are starting to turn black. I have tried multiple different types and brands of solder. If it helps I think the contacts on the board are made of copper. EDIT: Many people have asked for clarification, so I will try to answer them as best as I can. The solder does stick to the iron and does melt, but will not stick to the pcb. I will include pictures of the me trying to solder and of the solder I am using. The temperatures I have used include: 300C 350C 390C 250C and 200C Excuse me for bad quality, my phone wouldn’t focus.