The WiFi signal is weak, disassemble detection!
It is found that the WiFi antenna has an interface. The metal point in the middle has been dropped. The remedy is to replace a WiFi antenna, or to find a broken antenna. The antenna interface is replaced with the air gun.
One other thing is that the antenna looks good, but you can also consider changing an antenna! If the signal is weak or above, the motherboard interface is loose!
If the above can not work, it may be the problem of the main board, and it is necessary to repair the main board.
In general, when the WiFi antenna is replaced, the signal is normal.