I'm a newby, sort of, so pls ignore my possible ignorance. I didn't study engineering, but I studied physics and was a hobbyist. Then, electronics recently became a source of income. I'm still uncertain when it comes to being absolutely sure that a board has been fully restored. l work on fairly high-power circuits like 3-phase VSDs, so the client can't always give me the whole device to troubleshoot, just faulty sections of it, usually with water damage. How do I make absolutely sure that I've found all the damaged components BEFORE connecting the board back into the system and powering it up? I can't always simulate ideal test conditions. Is there a clever method, or is this just the nature of the beast? Also, I can't always confidently identify SMDs by the packaging markings.