Hp 840 g2 sleeping issue

[motanya]

Hp elitebook 840 g2, 6050A2637901-MB-A02. Was damaged with water repaired it, it worked fine for a week then started having an issue with sleeping, once it boots up to windows the screen goes off but power on lights remain on, the power button led keeps in a breathing state. If I press the power button it comes out of sleep mode and goes back immediately. I have tried replacing the power on switch d.board, checked for any corrosion and made sure it is clean, changed windows, used external display with the motherboard out of the casing, all of these have not solved the problem, what might be the issue?

[mcplslg123]

Re: Hp 840 g2 sleeping issue

LIDSW# checked?

[mon2]

Re: Hp 840 g2 sleeping issue

Too many sedatives??

In addition to the above advice, any stuck keys on the keyboard?

[Vesko356]

Re: Hp 840 g2 sleeping issue

Hp elitebook 840 g2, 6050A2637901-MB-A02. Was damaged with water...

Give a link to the schematic and/or boardview for your model, or upload them in the schematic sub-section if you have it, and link the post here.

.

[bripoll]

Hp elitebook 840 g2, 6050A2637901-MB-A02. Was damaged with water repaired it, it worked fine for a week then started having an issue with sleeping, once it boots up to windows the screen goes off but power on lights remain on, the power button led keeps in a breathing state. If I press the power button it comes out of sleep mode and goes back immediately. I have tried replacing the power on switch d.board, checked for any corrosion and made sure it is clean, changed windows, used external display with the motherboard out of the casing, all of these have not solved the problem, what might be the issue?

Hi, I have the same problem
Were you able to solve it?

In my case it happened after changing the keyboard
Everything was going well until I was installing the HP Keys software to make the function keys work and suddenly it started to suspend, as if I pressed the sleep or power button momentarily or closed the screen cover

The power button is fine, the lid sensor must also be fine, because if I put a magnet in the sensor area next to the power button, the laptop will not start

Also when starting up, if I don't keep the power button pressed, it almost always turns off.

If I keep the power button pressed from startup, even inside Windows, it remains on and does not suspend

Possible EC chip problem?
Power button circuit failure?


In this post, have the schematic of the board

https://www.badcaps.net/filedata/fetch?id=2223941

Thank you

[motanya]

Hi, I have the same problem
Were you able to solve it?

In my case it happened after changing the keyboard
Everything was going well until I was installing the HP Keys software to make the function keys work and suddenly it started to suspend, as if I pressed the sleep or power button momentarily or closed the screen cover

The power button is fine, the lid sensor must also be fine, because if I put a magnet in the sensor area next to the power button, the laptop will not start

Also when starting up, if I don't keep the power button pressed, it almost always turns off.

If I keep the power button pressed from startup, even inside Windows, it remains on and does not suspend

Possible EC chip problem?
Power button circuit failure?


In this post, have the schematic of the board

https://www.badcaps.net/filedata/fetch?id=2223941

Thank you

Unfortunately i did not, i think its a chipset problem(could be wrong though)

[bripoll]

Hello, thanks also
In my case I have made some progress in the diagnosis and I have ended up detecting that the problem seems to be in the power button circuit, but not in the button board itself, I have been able to rule this out.

If I press the button for just a moment, it turns on and almost always ends up turning off.

If I keep it pressed longer, it starts and when Windows is already starting, if you stop pressing the button, it doesn't turn off.

Later in Windows, having enabled in power options, what Windows should do if the power button is pressed, do nothing if the button is pressed, then it can be used completely normally, it is not suspended because Windows has order to do nothing when the power button is pressed

I don't know if the problem could come from a corrupt EC firmware or the power button circuit.

Everything happened due to a keyboard change, the old one didn't work and with the new one, I was installing the HP FN Keys software and the party started

I have tried to look for the boardview of the board, but I can only locate the schematic and I am not able to follow the track with my little experience (I have knowledge, but little time and experience)

What would it be, I think, is the only option I have left to keep track of the button and try to repair it.
If not it should stay like this