Check the appearance of the motherboard from top to bottom, from left to right, and check the content: <br>1. Whether the motherboard shrapnel is deformed; <br>2. Whether the label is attached in the correct position and whether it is wrinkled; <br>3. Whether the golden finger is dirty or tinted; <br>4. Button The battery welding condition, whether there is tin bonding, virtual soldering, short circuit, broken skin, etc.; <br>5. CPU chip dispensing condition (whether solidified, air bubbles, glue overflow, and contact with nearby components, etc.); <br>6. KEYMESH attachment condition, yes No skew, damage, or dirt. <br>7. The appearance of other motherboards, whether there are tin beads, tin residue, etc.
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