Pavilion G6 dead

[bicalov]

Hello Guys,

There is a problem in my HP G6 with mobo DA0R33MB6E0 REV:E R33
At first, the board would start, but black screen.
I programmed both eeproms, but no chnage.
Than suddenly, there was a shortage on the board and nothing works anymore. I think I found the shortage in PQ11 and PU5. I replaced them, no shortage anymore but also no life in mobo.
I measured the following voltages up til now,

PU8, PU5 and PU9, see text files.

on/off switch has 3,3v

Can somebody pls help me to look in the right direction?

thx

[bicalov]

Re: Pavilion G6 dead

Pls Guys, I need some help.
I have been checking voltages around U9 and the schematic says ACDET=13V,but I measure 3v. No leds are comming on so I would think that the signal should be 13V. But where is this 13V made. At +VAD_1 I have 19V, but after resistor PR47 it have 3V and also at +PWRSRC it has 19V and after resistor PR100 it shows 3V. Is there a mistake?

[ridamouh159]

Re: Pavilion G6 dead

YOU are say that on/off switch has 3,3v
and says ACDET=13V,but I measure 3v.
At +VAD_1 I have 19V, but after resistor PR47 it have 3V and also at +PWRSRC it has 19V and after resistor PR100 it shows 3V

and you are in pin 8 SDA AND PIN 9 SCL =0VOLT
I THINK that your bq is damaged

tel me about the pin 77.78 OF KB3940 PAGE 30 how is the volt .if you found 3.3v you can changing your PU9 =BQ24738

[bicalov]

Re: Pavilion G6 dead

Thanks for reaction.
I do not have 3V on on/off switch anymore, I don't know why.

On pin 77 and 78 on KB3940 = 0V

I said that ACDET is 13V, but that is not me, this is written on the schematics.

[ridamouh159]

Re: Pavilion G6 dead

you can forgot now the pq .
so you have in pin16= 17,5v of pu8 EXACT
have you 3.3v in pin 8 of kbc bios.

[bicalov]

Re: Pavilion G6 dead

you can forgot now the pq .
so you have in pin16= 17,5v of pu8 EXACT
have you 3.3v in pin 8 of kbc bios.

PU8 pin 16=14,68V
U18 pin 8 = 0V

[ridamouh159]

Re: Pavilion G6 dead

so we must return back
have you 19v in PQ50

[bicalov]

Re: Pavilion G6 dead

19,82V on all pins

[ridamouh159]

Re: Pavilion G6 dead

I think that the problem is in PU8 or in the around of him .
v out 7= 0v
vreg5 pin17= 4,6v you must found 5.10v
vreg 3 pin8= 3,3v ok
pin 10 -11-12-5-21-22-19 no good
p in -PU8 pin 16- you must found 19v

[bicalov]

Re: Pavilion G6 dead

Sorry for the delay and thx for your patience.

I am very confused now, because the previous voltage I measured changed.
PU8: pin 8 =0,5v pin 9= 4,35v
pin 7= 0v. pin17=4,24v
pin16= 7,02v

I don't know why this happened.
I found EC12 and PC95 with 1 side burned. EC12 more than PC95.

I will try and replace PU8 tomorrow.

[bicalov]

Re: Pavilion G6 dead

Finally I got to replace PU8 and the 2 capacitors EC12 and PC95.

the readings on PU8 are now:
pin 1,2,5,6,7,10,11,12,14,15,18,19,20,21,23,24 are 0V
pin 3= 2,86V
pin 4= 5,02V
pin 8= 3,35V
pin 9= 4,57V
pin 13= 2,86V
pin 16= 19,86V
pin 17= 5,10V
pin 22= 4,57V

Now on U18 pin8= 3,35V
Also on U14 pin 77,78= 3,35V

[ridamouh159]

Re: Pavilion G6 dead

NOW the work is ok
IF the problem is not solved
what about PQ35-PQ54 HAVE YOU 3.3V
AND PQ51-PQ52 have you 5.10v
and now YOU are in on/off switch 3,3v
if all is ok and you are 3.3v (sometimes no ) in pin 8 of U31 (PCH SPI ROM -page7)
if yes you make return your 2 dumps after (I programmed both eeproms, but no chnage)
IF stay teh same you flashing with any g6 BID 0183A.
good chance

the photos i put him with is for G6-2149sf he coming to me with chip problem in 2014 .
my english language is bad therefore i can't exprime or discuse good.

[ridamouh159]

Re: Pavilion G6 dead

I must no asking you about PQ50 because your measured pin 4 ACDRV =19.80V coming from PQ50 .

[bicalov]

Re: Pavilion G6 dead

Don't worry about the English, you are doing very good and I am very happy you're helping me. I speak English for years, also at home, so I can understand you very well.

Powerswitch has 3,32V
PQ51: pin 5,6,7,8 = 19,82V ; pin1,2,3=0V ; pin 4=0V
PQ52: all pins 0V
PQ54: pin 5,6,7,8 = 19,82V ; pin1,2,3=0V ; pin 4=0V
PQ53: all pins 0V

U31 PIN 8=0V

No leds on at all

[bicalov]

Re: Pavilion G6 dead

I must no asking you about PQ50 because your measured pin 4 ACDRV =19.80V coming from PQ50 .

I don't have a problem with that, better to be sure.

[ridamouh159]

Re: Pavilion G6 dead

now sure the problem is in PU8 or around him
i think that a composant as PQ51-PQ52- PQ54 -PQ53 cause the damage for pu8
search for a short ciruit in 4 mosfet or an other composant near from
and make sure that your pu8 is good placed

[ridamouh159]

Re: Pavilion G6 dead

how is the volt in pin 7 out2 and pin 24 out1 and pin 23 PGOOD of PU8

[bicalov]

Re: Pavilion G6 dead

PU8 pin 7, 24 and 23 are 0V
I will look if I can find shortag

Before you say,that if pin 77 and 78 of KB3940 are 3,3V, replace BQ24738.
Now the pins 77 and 78 are 3.35V again. Should I replace?

[bicalov]

Re: Pavilion G6 dead

PL16 had a loose contact and I replaced it. After that, PU5 get's very hot, so there is a shortage somewhere. Can you advise where to look?

On PC211 I have 56 Ohm

[ridamouh159]

Re: Pavilion G6 dead

PU8 pin 7, 24 and 23 are 0V
I will look if I can find shortag

Before you say,that if pin 77 and 78 of KB3940 are 3,3V, replace BQ24738.
Now the pins 77 and 78 are 3.35V again. Should I replace?

before sda and scl =0v and the 3.3 v is corupted by pu8 after changing it is ok and you must forgot bq now .