HP Notebook Docking Station Repair

Machine model: HP notebook HP USB-C DOCK G4

Repair process: Docking station, also known as port replicator, is an external device specially designed for laptops. By copying or even expanding the port of the notebook computer, the laptop can be conveniently connected to multiple accessories or external devices (such as power adapter, network cable, mouse, external keyboard, printer and external display) in a one-stop manner. The following is the specific information on the back of the docking station PN L13898-002 SPSL16133 RMN/model: HSTNH-U601 MADE IN TAIWAN TW.

HP Notebook Docking Station Repair Figure 1.

There is no response when connecting to the laptop, and the machine is ready to be disassembled. First, use a hot air cylinder to heat the blue soft glue on the back. After disassembly, there are 6 screws as follows.

HP Notebook Docking Station Repair Figure 2.

Take off the screws

HP Notebook Docking Station Repair Figure 3.

After removing the mainboard, observe the mainboard

HP Notebook Docking Station Repair Figure 4.

It is abnormal to measure the low secondary value of 3.3V power supply inductance to the ground with a multimeter. It is judged that the PD chip CYPD4225 is damaged according to experience. The 3/3V inductance to the ground value is normal after removing the chip. Take a good chip and install it. Prepare to burn the PD chip program, open the burning software and load the HEX file.