HP Notebook Docking Station Repair

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.

Remove the screws with such a long inside.

HP Notebook Docking Station Repair Figure 3.

After removing the motherboard, observe the motherboard.

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. According to experience, it is judged that the PD chip CYPD4225 is damaged, and the ground value of 3V inductance 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.