When you make a PCB, you must check it very carefully. A small mistake can stop the whole product from working. Here are the Top 7 PCB testing methods that good factories use every day. 1. Visual Check & Automated Optical Inspection (AOI) The machine takes high-quality photos of the board and looks for wrong parts, bad solder, or missing pieces. Fast and cheap – perfect for every board. 2. In-Circuit Testing (ICT) – Bed of Nails A special “bed” with many small pins touches th