help me please DAX1PDMB8E0 rev e

[marcelofct]

I have problems with this laptop hp 15-ak003la, it does not turn on the jackpower light, I have AC voltage 19v
EC = 3.3
charger BQ24780S
vcc 19v
acdet = 3v
acin = 2.9v
I press the power button and it does nothing
please your help to fix it
I attach a schematic

[Sephir0th]

Re: help me please DAX1PDMB8E0 rev e

Voltages and Résistance to GND at PL29 and PL30?

Also Check your Power switch: Does the 3.3V drop to Zero when you Press it?

[marcelofct]

Re: help me please DAX1PDMB8E0 rev e

Voltages and Résistance to GND at PL29 and PL30?

Also Check your Power switch: Does the 3.3V drop to Zero when you Press it?

yes the power button its ok

i left the office , tomorrow i will edit the post with voltages and resistance :thank you

[marcelofct]

Re: help me please DAX1PDMB8E0 rev e

Voltages and Résistance to GND at PL29 and PL30?

Edit :
PL29 5v - resistance to GND 10k
PL30 3.3v resistance to GND 4.4K

[Sephir0th]

Re: help me please DAX1PDMB8E0 rev e

That's Bad. I Had hoped that the issue is there...

Now Check Voltage (Before and After) and Résistance to GND of each Coil and Share the values Here. Please add the Values of PL29 and PL30 Into the list.

Check also whether a Voltage is Coming on at least for an blink of an eye after pressing the button.

[marcelofct]

Re: help me please DAX1PDMB8E0 rev e

That's Bad. I Had hoped that the issue is there...

Now Check Voltage (Before and After) and Résistance to GND of each Coil and Share the values Here. Please add the Values of PL29 and PL30 Into the list.

Check also whether a Voltage is Coming on at least for an blink of an eye after pressing the button.

what means bad... the board is shorted or its dead ?

i wiil check the coils

[Sephir0th]

Re: help me please DAX1PDMB8E0 rev e

Check the coils Like suggested. When everything seems fine, we should try Flashing the BIOS First.

[marcelofct]

Re: help me please DAX1PDMB8E0 rev e

That's Bad. I Had hoped that the issue is there...

Now Check Voltage (Before and After) and Résistance to GND of each Coil and Share the values Here. Please add the Values of PL29 and PL30 Into the list.

Check also whether a Voltage is Coming on at least for an blink of an eye after pressing the button.

PL16 = 0.17 / resistance 720 ohm
PL19 = 0v / Resistance 22 ohm
PL20 = 0v / Resistance 16.2 ohm
PL22 = 0v / Resistance 7.2 ohm
PL26 = 0v / Resistance 7.2 ohm
PL27 = 0v / Resistance 3.7 ohm
PL28 = 0v / Resistance 3.7 ohm
PL23 = 0v / Resistance 3.7 ohm
PL29 = 5v / Resistance 10k ohm
PL30 = 3.3v / Resistance 4.4k ohm
PL24 = 0v / Resistance 21.5 ohm
PL25 = 0.99v / Resistance 56 ohm

when i press power button nothing happend no voltage

[Sephir0th]

Re: help me please DAX1PDMB8E0 rev e

Besides PL19 and PL20 should be the Same Résistance, all the resistances seems fine. ALW voltages present, No obvious short.

Try Flashing known working BIOS First and pray. Otherwise it Would be a hard one.

I assume you're working With known working charger of correct wattage and known working RAM too, Otherwise make this Sure First.

[marcelofct]

Re: help me please DAX1PDMB8E0 rev e

Besides PL19 and PL20 should be the Same Résistance, all the resistances seems fine. ALW voltages present, No obvious short.

Try Flashing known working BIOS First and pray. Otherwise it Would be a hard one.

I assume you're working With known working charger of correct wattage and known working RAM too, Otherwise make this Sure First.

off corse : good ram an original charger working 100%

i will try a new bios

kbc is probramable, it will have to do with that ?

[marcelofct]

Re: help me please DAX1PDMB8E0 rev e

I flash bios and nothing happend ,power button dOEs 3.3v when press the button drop to 0v maybe is a wrong dump i leave my dump if someone can check it out

[mcplslg123]

Re: help me please DAX1PDMB8E0 rev e

Do you have +3VPCU at pin5 of PU20?? What about AD_ID?? ACDRV Voltage on BQ24780??

[SMDFlea]

Re: help me please DAX1PDMB8E0 rev e

I flash bios and nothing happend ,power button dOEs 3.3v when press the button drop to 0v maybe is a wrong dump i leave my dump if someone can check it out

Bios moved to "Bios Requests ONLY!" section - https://www.badcaps.net/forum/showthread.php?p=1059029

[marcelofct]

Re: help me please DAX1PDMB8E0 rev e

Do you have +3VPCU at pin5 of PU20?? What about AD_ID?? ACDRV Voltage on BQ24780??

Now battery is charging :/ and. No power on when i press the power button next monday i'll check AD_ID and ACDRV is present i check again on monday
Thank you

[marcelofct]

Re: help me please DAX1PDMB8E0 rev e

thanks for your help but i don't have the laptop anymore