We need to check all the features of the PCB after it is designed. We should also do a simple analysis to ensure that we don't make any mistakes.

1. Open the PCB design using the computer, brighten the network that is short-circuited, and find the easiest and closest place to connect. Pay special attention to the short-circuit inside the IC. If you are welding by hand, make sure that your practices are excellent.

2. Visually inspect the PCB before welding and use a multimeter for inspection. Check to see if the circuit is shorted.

3. Before welding a chip, you should test with a multimeter whether the ground and power supply are short-circuited.

4. Do not randomly swing the blowpipe when soldering PCBAs. It is difficult to detect and locate a short circuit if you accidentally solder the pins of the chip. This is especially true for surface-installed elements. Cut the line with a board (specifically for single/double layer boards). After cutting the line on the board, turn each block individually on and eliminate them gradually.

5. Use the short circuit analysis and positioning tool.

6. BGA chips are used in PCBA spot processing. PCBA spot processing uses BGA chips. Since all solder joints can't be seen and are covered by the chips, it is best that the power supply for each chip is separated during the design phase and connected with zero-ohm electrodes or magnetic beads.

When the ground and power supply are short-circuited it is very easy to identify a specific chip by disconnecting the magnetic grains discovery. Hand-on BGA welding is difficult and you can short-circuit both the power supply and the ground solder if not careful.

7. Be careful when welding surface-mount capacitors of small size, particularly power filter capacitors (103 or 104). Many of these can cause a short between the power source and the ground.