Satellite signals are the basis of GPS for on-board navigation for positioning and navigation. If you can't search for satellite signals, then GPS can't perform navigation, which means that your GPS is just a scrap of iron. There are three general situations where GPS cannot search for satellite signals:

1. GPS belongs to the cottage in the cottage, and the "use period" is short.

2. The satellite signal is weak, and it can work normally after adjusting the position.

3. It is interfered by other electric appliances in the car, and it can be used normally after eliminating the interference.

Simple judgment and solution:

To identify why satellite signals cannot be searched for, try positioning in an open square. It is easier to capture satellite signals in open squares, and it is possible to eliminate interference from electrical appliances in the car. If in this case, you still cannot search for satellite signals, then 99% of your chances are that your GPS belongs to a cottage in the cottage, and you should negotiate with the purchaser to replace or even refund.

If the signal cannot be searched only in the car, and a weak signal can be obtained when it is near or even outside the window, we can judge it as the second case. The ability of GPS to search for satellites is closely related to the GPS hardware. General navigators have built-in antennas. The built-in antennas are relatively small, and the received original satellite signals are weak, and they cannot even search for satellite signals. Car owners can choose to install GPS amplifiers to enhance GPS signals.

When using a variety of electrical appliances, such as a driving recorder, GPS cannot be used normally. Then, the reason why the GPS signal cannot be searched is most likely the result of mutual interference of electronic products. Because the signal frequency bands are too close, they cause mutual interference. The owner can choose to use only one of the electrical appliances, or try to wrap the circuit board with tin foil to eliminate interference by himself.