Lenovo IdeaPad 310-15IKB - NM-A981 - A simple task : Power button circuit

[Hardo.electronics]

Hello guys.

I just got this Lenovo Idea Pad 310 from one of my customers. It takes some liquid damage on the power button circuit and the laptop turns on only once I removed RTC Battery and plugged the charger in.

Cleaned all the moisture and the liquid damage , but I lost one of the Power button pad.

Now I found the schematichs in the forum but I'm honest , I can read it really well.

So, could someone help me with this simple task?

[Techtiger]

Re: Lenovo IdeaPad 310-15IKB - NM-A981 - A simple task : Power button circuit

Pad 1 & 3you should get 3.3V 2/4 is connected to GND check the voltage SW3 if no voltage connect a jumper to SW1 pad with 3.3V

[Hardo.electronics]

Re: Lenovo IdeaPad 310-15IKB - NM-A981 - A simple task : Power button circuit

Thanks! It works perfectly now. I notice that D26 is missing in the PCB because I removed it while cleaning that liquid damaged part.

What is needed for?

[ktmmotocross]

Re: Lenovo IdeaPad 310-15IKB - NM-A981 - A simple task : Power button circuit

Thanks! It works perfectly now. I notice that D26 is missing in the PCB because I removed it while cleaning that liquid damaged part.

What is needed for?

it is ESD protection diode. it is not needed