HP Pavillion 15-p035nd no power

[aquacattt]

Hello guys.

I am trying to repair a HP Pavillion 15-p035nd, which has no power. I have a 19v rail, but no 3.3, or 5 volt.

In the picture you see me point at a component, where 19 volts goes in left, and 0.0v on the right. Also, on the mosfet above, input is 19v but no output. Output is also shorted to ground.

Does anyone have an idea to fix this?

Greetings,
Gerben.

[Techtiger]

Re: HP Pavillion 15-p035nd no power

That’s a capacitor one side is ground other side you get power check your power button if it’s having 3.3V

[SMDFlea]

Re: HP Pavillion 15-p035nd no power

Post the motherboard part number,it might be next to the memory slots and will be something similar to DAY23AMB6C0

[aquacattt]

Re: HP Pavillion 15-p035nd no power

Hello guys,

The motherboard now does not get any power, it seems to not be able to recognize the charger correctly, it bounces between 0.45v and 0.59v. The charger also makes a high squeaking noise. Charger works correctly on another laptop.

The board did not make any 3.3v or 5.5v, so was unable to test that.

Around the memory slots was this:
tpt MV-0 20 94V-0
PEMLB028J7LPW
766473-501
DC14A0
Model: Y11A

[Techtiger]

Re: HP Pavillion 15-p035nd no power

In the post#1 you have said +19V +5/3V but now no voltage where did you test in MB , your +19V is short to GND

[Techtiger]

Re: HP Pavillion 15-p035nd no power

Take a pic of the MB both sides upload

[aquacattt]

Re: HP Pavillion 15-p035nd no power

No, I said i did have 19v, but no 5 or 3 volt.

Edit: I desoldered a diode, after the 19v short to ground appeared, to no avail. https://www.youtube.com/watch?v=ki708kDH81s

[Techtiger]

Re: HP Pavillion 15-p035nd no power

There is a burnt mark on this MOSFET it's 30V N or P Channel Fet

[aquacattt]

Re: HP Pavillion 15-p035nd no power

Oh my lord thank you so much! What kind of mosfet can I order? Should I get a N or P channel fet

[Techtiger]

Re: HP Pavillion 15-p035nd no power

Just next to the Fet if it is mark as PQ20 as for the Schematic it’s N-channel 30V

[aquacattt]

Re: HP Pavillion 15-p035nd no power

Alright thanks, i'll order this one: https://www.reichelt.nl/power-mosfet...?&trstct=pol_6

[aquacattt]

Re: HP Pavillion 15-p035nd no power

Hey guys,

So i replaced the mosfet. I do have 19v again now, but still have the same problem. Left pin 0 volt. Right pin should be ground right?

Do you have any other idea about what it can be?

Greetings,
Gerben van Dijk.

[digitalpc]

Re: HP Pavillion 15-p035nd no power

any coil shorted to ground?

[mcplslg123]

Re: HP Pavillion 15-p035nd no power

The best thing to do is remove the B+ resistor and check which side is shorted to gnd and then apply 1V on the shorted side and see if anything heats up. Post measurement in resistance mode on all coils.

[Techtiger]

Re: HP Pavillion 15-p035nd no power

Hey guys,

So i replaced the mosfet. I do have 19v again now, but still have the same problem. Left pin 0 volt. Right pin should be ground right?

Do you have any other idea about what it can be?

Greetings,
Gerben van Dijk.

you replace a N-Channel fet SOURCE DRAIN GATE no Ground pins go through Youtube/Googel ect how the Fets work without basic knowledge you will do more damage to the MB , upload a pic of MB how you replace fet Q20 , put the multimeter in DIODE mode and test GATE & SOURCE

[digitalpc]

Re: HP Pavillion 15-p035nd no power

haha same problem with same motherboard ecxatly, do u fix yet?