HELP!! Dell E6440 laptop with problem does not turn off and turn itself on help

[PacoGT]

A few days ago my laptop gave me problems, when I wanted to turn it on to my surprise without charging so I did not put much importance on it, after that I turned it on with a charger, it turned on and charged the laptop, the problem with the laptop is that when it is turned off it turns to turn on after seconds, sometimes at 2 or sometimes at 8, other than that it works normally, I already checked many things, I changed a mosfet at the charge input to a pnp but it remained the same, after that I checked and I did not find anything outside Normally, before that, it had a failure where I changed the cd3330, which is the one that charges the battery and detects the charger, it works, I changed it at the beginning about 8 months ago and it did not give a problem, it has not had a liquid spill or any other problem, as I mentioned the I repaired the laptop and used it a little, it was simply left unused, I already tried changing several bioses and it gives the same problem. I can upload my copy of the bios in case you want to review it, I have already cleaned the motherboard completely and it remains the same, it seems strange to me since when connecting the The laptop's battery turns on directly, which it shouldn't do. In my experience, I wonder if anyone has had this problem or if they know if it's an ignition control chip, a resistor or something similar, I checked the voltage on the power button and it never goes on shorted to ground when you turn on again,

[mon2]

Re: HELP!! Dell E6440 laptop with problem does not turn off and turn itself on help

Check the battery mosfet. This is the mosfet between the battery and the main power rail. Most likely it is leaky if the logic board turns on when the battery is connected.

Remove all power. Meter in resistance mode.

Measure

Source & drain
Source & gate
Gate & drain

Post each resistance measurement.

[mcplslg123]

Re: HELP!! Dell E6440 laptop with problem does not turn off and turn itself on help

When shut down from windows it re-starts itself instead of completely shutting down?

[PacoGT]

Re: HELP!! Dell E6440 laptop with problem does not turn off and turn itself on help

When shut down from windows it re-starts itself instead of completely shutting down?

That's how it is when you turn it off from windows or from the bios, the computer turns itself on again after a few seconds

[PacoGT]

Re: HELP!! Dell E6440 laptop with problem does not turn off and turn itself on help

A few days ago my laptop gave me problems, when I wanted to turn it on to my surprise without charging so I did not put much importance on it, after that I turned it on with a charger, it turned on and charged the laptop, the problem with the laptop is that when it is turned off it turns to turn on after seconds, sometimes at 2 or sometimes at 8, other than that it works normally, I already checked many things, I changed a mosfet at the charge input to a pnp but it remained the same, after that I checked and I did not find anything outside Normally, before that, it had a failure where I changed the cd3330, which is the one that charges the battery and detects the charger, it works, I changed it at the beginning about 8 months ago and it did not give a problem, it has not had a liquid spill or any other problem, as I mentioned the I repaired the laptop and used it a little, it was simply left unused, I already tried changing several bioses and it gives the same problem. I can upload my copy of the bios in case you want to review it, I have already cleaned the motherboard completely and it remains the same, it seems strange to me since when connecting the The laptop's battery turns on directly, which it shouldn't do. In my experience, I wonder if anyone has had this problem or if they know if it's an ignition control chip, a resistor or something similar, I checked the voltage on the power button and it never goes on shorted to ground when you turn on again,

I update my post
checking my motherboard carefully after 2 days I found the problem today
a resistor and something like a multi resistor was too small, I couldn't see it well that it was in bad condition but when looking for it in the schematic I realized that it was in charge of the ignition and that, the good thing is that it is not a pch problem and I am grateful to I leave you with a photo of the schematic so you can see what they are, it took me a long time to find a spare part on a parts plate but I managed to find it and solve the problem