HP Laptop 14 didn’t respond when it was turned on. Here comes the repair tutorial

HP Laptop 14 didn’t respond when it was turned on. Here comes the repair tutorial.

Received an HPnotebookThe computer was not turned on when it was flooded. After disassembling, it was found that many places were seriously corroded. After cleaning up the corrosion, there was no organization or abnormality. The specific maintenance process is as follows:

“Machine model” HP Laptop 14

[Fault phenomenon] No boot.

[Maintenance process] I received a machine that was not turned on when it was flooded, and the model was HP Laptop 14.

HP Laptop 14 does not boot Figure 1

For machines that have been flooded with water and are seriously flooded, let’s not go on the electrical test first. Let’s take apart the machine to see the water inflow and whether there are short-circuit corroded components.

The disassembling machine found that the machine had several places with serious water inflow, which had been moldy and corroded a large area, and the inductors near and beside the Type-C interface were seriously corroded.

HP Laptop 14 does not boot Figure 2

HP Laptop 14 does not boot Figure 3

We cleaned up the corroded place, and then measured the resistance, and there was no abnormality. Then, after the power-on test, it was found that there was no current when the Type-C interface was plugged in, and the main power supply resistance of the motherboard was normal when the data cable was plugged in, but the current did not enter the motherboard. Then, we directly removed the Type-C interface and replaced it with a new one. After the interface was replaced, we were powered on to test the current. After the shell test, it was found that the current could reach about 0.7A, and the memory was plugged in and the hard disk started up and entered the system normally.

HP Laptop 14 does not boot Figure 4

[Maintenance result] After the machine is installed, the functions of testing sound, network, recording and playing video are all normal, the frame rate of double baking for half an hour is stable, the fault is perfectly repaired, and the maintenance is over.