The Dell 15-5547 notebook does not respond when pressing the switch, and the short will not trigger the repair

The Dell 15-5547 notebook does not respond when pressing the switch, and the short will not trigger the repair.

Dell 15-5547 notebook does not respond when pressing the switch, and the small inductance next to the small battery is 0 to the ground; One of the nearby capacitors is a little black and has a small crack. After turning off the capacitor, I found another capacitor to repair it.

[Machine model] Dell 15-5547

[Fault phenomenon] The notebook doesn’t respond when pressing the switch.

[maintenance process]

The customer received a Dell 15-5547 notebook, but it didn’t respond when it was plugged into the adjustable 0.25A switch. There was a squeaking sound after listening carefully. Remove the motherboard, test several large inductors, and find out the enemy’s situation. The small inductor next to the small battery is grounded.

Dell 15-5547 Notebook doesn’t respond when pressing the switch, but short does not trigger maintenance Figure 1

Tear off the sticker, unplug the battery, and look at the nearby capacitor. One color is a little black and has a small crack.

Dell 15-5547 Notebook doesn’t respond when pressing the switch, but short does not trigger maintenance Figure 2

Measure the short circuit as indicated by the arrow.

Dell 15-5547 Notebook doesn’t respond when pressing the switch, but short does not trigger maintenance Figure 3

Take it down, that’s it.

Dell 15-5547 Notebook doesn’t respond when pressing the switch, but short does not trigger maintenance Figure 4

Test the motherboard again, and it has returned to normal.

Dell 15-5547 Notebook doesn’t respond when pressing the switch, but short does not trigger maintenance Figure 5

After turning off the capacitor, I found another capacitor to repair it.

Dell 15-5547 Notebook doesn’t respond when pressing the switch, but short does not trigger maintenance Figure 6

Install a system by the way.

Dell 15-5547 Notebook doesn’t respond when pressing the switch, but short does not trigger maintenance Figure 7

There is a little episode in the middle of this book’s repair, and the main board can light up the screen after the screen test. Then install the machine, and when it is installed, start the machine without displaying 5 drops. Another COMS battery was removed and replaced, but it was turned on several times, and it didn’t sound 8 times. The external keyboard lights up, and the external screen is gray. Remove the back cover, clean the lower screen line, and try it twice.

Ready to install the system, the system turned on for 8 times. Disassemble AB shell, and found that the screen was changed after installation. Clean the lower interface and fix it. Try the machine for many times, open the lid for many times, and everything is normal. Troubleshooting, the maintenance is over.