Hp G6 intel R 13 dead no power issue

[Bisketti]

Hi I have a Hp g6 intel board Da0r13mb6e0 rev e board thats dead . Im getting 3.3vs5 and 5vs5 voltages, the KBC pin 95 (rsmrst) is going from 0v to 3.3v also pin 101 s5_on is going from 0v to 3.3v.Pin 112 (sus_pwr_ack) goes from 0v to 3.3v.
There are no leds and the board seems dead as in no fan or leds lighting.Any pointers would be great. I have attached the schematic i am also using a bench supply as the dc jackl lead seems to be damaged too.

[Th3_uN1Qu3]

Re: Hp G6 intel R 13 dead no power issue

If you say you have 3.3v and 5v and voltage on the power button, try flashing the BIOS.

[Bisketti]

Re: Hp G6 intel R 13 dead no power issue

Yeah I will try that but would I get signal from the Kbc if the bios was corrupt?

[Th3_uN1Qu3]

Re: Hp G6 intel R 13 dead no power issue

If it's got a separate EC BIOS, then yes.

[Bisketti]

Re: Hp G6 intel R 13 dead no power issue

Thanks for the info, I downloaded and extracted the bios and there are 4 different bin file in it Im also having trouble locating the bios chip. I found it I think its u22

[Bisketti]

Re: Hp G6 intel R 13 dead no power issue

It seems the bios pins 3 and pin 8 do not have 3v pin 8 has .57v. pq19 gate is not being switched by PU2. I accidentally shorted pin 12 and 13 together this switched on the laptop the backlight was not on but I could make out no operating system on the screen.

[Bisketti]

Re: Hp G6 intel R 13 dead no power issue

It seems the bios pins 3 and pin 8 do not have 3v pin 8 has .57v. pq19 gate is not being switched by PU2. I accidentally shorted pin 12 and 13 together this switched on the laptop the backlight was not on but I could make out no operating system on the screen.

Pq19 supplys the +3v by the looks of it and Pu2 switches the gate on but its not doing that, what I also found was when I shorted pins 12 and 13 and the laptop booted up the PCH gets hot. Im not sure how hot these chips normally get.I presume on4 pin12 pu2 is what switches pq19 gate on. Is there still any point in flashing the bios??? Any input is appreciated

[alihomee]

Re: Hp G6 intel R 13 dead no power issue

it you got the post on screen with no back light then no need to flash bios only locate the cause of no back light

[Bisketti]

Re: Hp G6 intel R 13 dead no power issue

The situation is still the same Im not getting the mainon signal into pu2 which I presume switches on the gate to pq19 this only worked as I shorted the pins but after powering down the set is dead again until pq19 is switched on by pu2. What causes the kbc to release this voltage? (mainon).The backlight is a different issue if I can get the unit to power on as it should then I will try fix Back light issue.

[tomodachi]

Re: Hp G6 intel R 13 dead no power issue

Same motherboard here on my bench at the moment. First 3.3V rail was completely shorted because of corrupt HM65 chip. I replaced that chip and now I can't get 3.3 or any other voltage anywhere on board. God damn Quanta motherboards are full of surprises and nearly impossible to repair.

[selldoor]

Re: Hp G6 intel R 13 dead no power issue

Great can you get a part number for the op its on the screen panel board

Hi this is a 15.6" LED laptop screen LP156WH$ (TL) (CL1).
Pno: 6870s-1128a
lp156wh4-tla1

Ic: US2.

[whaldsz]

Re: Hp G6 intel R 13 dead no power issue

Pq19 supplys the +3v by the looks of it and Pu2 switches the gate on but its not doing that, what I also found was when I shorted pins 12 and 13 and the laptop booted up the PCH gets hot. Im not sure how hot these chips normally get.I presume on4 pin12 pu2 is what switches pq19 gate on. Is there still any point in flashing the bios??? Any input is appreciated

What do you get at pin 4 of PU2 before or after you pressed power button?

Could be PU2 or SIO chip may need replacement.

[Bisketti]

Re: Hp G6 intel R 13 dead no power issue

What do you get at pin 4 of PU2 before or after you pressed power button?

Could be PU2 or SIO chip may need replacement.

Pu2 pin2 and pin 4 0V before and after, I think these should both be 0v before and then go high after pressing power button. This mainon signal is not being sent by Sio Im curious of what needs to happen to release mainon from Sio?.

[whaldsz]

Re: Hp G6 intel R 13 dead no power issue

Pu2 pin2 and pin 4 0V before and after, I think these should both be 0v before and then go high after pressing power button. This mainon signal is not being sent by Sio Im curious of what needs to happen to release mainon from Sio?.

RSMRST#, check it for 3.3v after power button is pressed.

[Bisketti]

Re: Hp G6 intel R 13 dead no power issue

RSMRST#, check it for 3.3v after power button is pressed.

Yes check my original post. Its going from 0v to 3.3v

[khaahk]

Re: Hp G6 intel R 13 dead no power issue

Resistance from PU2 pin2 to ground? Maybe sio output or PU2 input shorted to ground?

[alifoural]

Re: Hp G6 intel R 13 dead no power issue

can i ask what is the job of pu2 on the motherboard , its seems its make alot of problems

i have laptop repair shop ,,, i got more than 7 laptop hp g6 has the same problem when i change this ic its work ok

when i plug the charge , its light ok , and 5v ,3v ok , but when i press power its gone ,,, the maual says its for dis-charge ic , what that mean ?

[Laptop_repair_hut]

Re: Hp G6 intel R 13 dead no power issue

Did anyone ever get a result with this ? ive currently got 2 boards with this issue and the problem seems to come from pu2, what is this component and does anyone know where i can get one

Thanks

Stephen

[nazrul145]

Re: Hp G6 intel R 13 dead no power issue

You can reflow PCH.