dag3dbmb8d0 HP laptop cut off the power supply. 0 reactions

[magicpc]

hello, i have a laptop that is dead. When connecting the power supply, its voltage drops from 19.9v to 100mV. I changed the power supply and the charging port, but that didn't help. I measured the output keys and diode drops of about 0.540V.
I have attached a photo of the coil resistance which is very small.
Where to look for the problem?
Nothing is hot on the motherboard.

Motherboard: dag3dbmb8d0 g3jb

[Stevedb]

Re: dag3dbmb8d0 HP laptop cut off the power supply. 0 reactions

You have a shorted motherboard if the voltage from charger is gone when you plug it. You can measure without any power main powerrail on the currentsensor to ground.

[magicpc]

Re: dag3dbmb8d0 HP laptop cut off the power supply. 0 reactions

I gave the wrong plate name. The correct one is dag3jbmb8d0 g3jb. Can I supply 19V from the service power supply to the power socket?

[mcplslg123]

Re: dag3dbmb8d0 HP laptop cut off the power supply. 0 reactions

@stevedb has correctly pointed out that you have shorted +19V rail. Locate the current sense resistor for adapter,remove it and then measure resistance to GND on both pads of this CLR. You may inject not more then 1V on shorted side of this CLR. Injecting 19V is clear NO NO.