Starting problem HP -dw1033dx LA-H325P

[Tend0]

Hi there
I leave it to you because out of ideas I don't know how to troubleshoot this computer
Here I received the computer which did not turn on at all and no charging light
After checking I quickly found that the main 19v line did not cross the 1st MOSFET and that it was burnt
After replacing it I have the lights and the PC turns on after 3s and then turns off after a short circuit to ground
I don't know where to check since I don't have a diagram or brd
The card refs: FPW50 LA-H325P
Thanks in advance

[mon2]

Re: Problème de démarrage HP -dw1033dx

What is the charger IC near this acfet ?

Post the markings from the topside of the IC.

[Tend0]

Re: Problème de démarrage HP -dw1033dx

3h=8g

[Tend0]

Re: Problème de démarrage HP -dw1033dx

Après vérification le bios n'est pas alimenté j'ai pas les 3v3 sur le bios

After checking the bios is not powered I do not have 3v3 on the bios
.

[SMDFlea]

Re: Problème de démarrage HP -dw1033dx

Après vérification le bios n'est pas alimenté j'ai pas les 3v3 sur le bios

Read your private messages please,post in english !!!!!!!!!!

[SMDFlea]

Re: Problème de démarrage HP -dw1033dx

Après vérification le bios n'est pas alimenté j'ai pas les 3v3 sur le bios

After checking the bios is not powered I do not have 3v3 on the bios
.

Is the bios chip 1.8V

[SMDFlea]

Re: Problème de démarrage HP -dw1033dx

3h=8g

Is it a capital H or lower case h ,post a picture of it

[lpraderi]

Re: Starting problem HP -dw1033dx LA-H325P

LA-H325P uses BQ24725A Charger IC from Texas Instrument.
You pointed to 3V3ALW/5VALW controller IC.

[mcplslg123]

Re: Starting problem HP -dw1033dx LA-H325P

Follow simple basics:
01.Check resistance between
Source-Gate
Source-Drain
Gate-Drain
of both the dc-in fets.

02.Locate the CLR(Current sensing resistor) just after the 2 dc-in mosfets or near to charging IC. The location may vary but easily findable. Remove it from mb and then check resistance to GND on both pads of CLR.

Post your findings here.