HP Pavillion G6. no power

[lorins_core]

Re: HP Pavillion G6. no power

@atsio yeah you're right. I missed the battery part.

Pare. do you have any idea? to this trouble, then how to fix it?

[atsio]

Re: HP Pavillion G6. no power

PU3
PIN 8- 50ohms (5ohms X10 selected) Analog type ohmmeter
PIN 17- 60ohms (6ohms X10 selected) Analog type ohmmeter
Coil
PL21-1.9 OHM read X10
PL20- 1.9 OHM read x10

Are you certain for these values (you measure without power supply and battery);

[lorins_core]

Re: HP Pavillion G6. no power

Are you certain for these values (you measure without power supply and battery);

i measure no battery or Charger insert.

[lorins_core]

Re: HP Pavillion G6. no power

how ever i notice at the PU3 Pin No.17 no voltage output.
I check on schematic diagram no supply on (VREG5) missing the supply +5VPCU...

[atsio]

Re: HP Pavillion G6. no power

Remove PU3 and measure resistance on those points again

[lorins_core]

Re: HP Pavillion G6. no power

Remove PU3 and measure resistance on those points again

pu3
pin#8= 50ohms reading on x10

pin#17 400ohms reading on x10

pl20 19ohms reading on x10

pl21 19ohms reading on x10

[atsio]

Re: HP Pavillion G6. no power

pu3
pin#8= 50ohms reading on x10

pin#17 400ohms reading on x10

pl20 19ohms reading on x10

pl21 19ohms reading on x10

50 ohms on pin 8 means a short on that line. Main suspect is EC controller. You have to remove U5 and check resistance again on the above points.

[lorins_core]

Re: HP Pavillion G6. no power

50 ohms on pin 8 means a short on that line. Main suspect is EC controller. You have to remove U5 and check resistance again on the above points.

here the mobo


now remove the EC Chip



the here the testing point w/ supply

the here the testing point w/ supply
PU3
PIN #8 - 0.6V
PIN #17 - 0V

PL20 & PL21- Both 0V

U5 - 0V

then the resistance measure using x10
PU3
PIN #8 - 60 ohms
PIN #17 - 60 ohms

PL20 & PL21- 190 ohms

U5 - 0 ohm

question?
why have no supply on pu3 PIN#17 +5VPCU (.0V)? then the PIN#8 +3VPCU only (0.6V)? adapter charger supply inserted

[lorins_core]

Re: HP Pavillion G6. no power

Follow Up...

[atsio]

Re: HP Pavillion G6. no power

You shouldn't have 60ohm on pins 8 and 17. Remove PU3 and clean the pads of both PU3 and U5 from solder (avoid contacts-shorts between pads) and measure resistance again on 8 and 17 without adapter.

[lorins_core]

Re: HP Pavillion G6. no power

You shouldn't have 60ohm on pins 8 and 17. Remove PU3 and clean the pads of both PU3 and U5 from solder (avoid contacts-shorts between pads) and measure resistance again on 8 and 17 without adapter.

sorry for late post
i set may ohmmeter to x10. bec my x1 ohmmeter have problem
remove the PU3 IC, no supply test


take a look a actual test on image 1 to 4

image no 1


image no 2


image no 3


image no 4



1. PU3 Pin#8 see image 1 is a forward (60 ohms)
2.PU3 Pin#8 see image 2 is a reverse (900 ohm)
3.PU3 Pin#17 see image 3 is a forward (400 ohms)
4.PU3 Pin#17 see image 4 is a reverse (0 ohm)

Thanks Atsio. hoping have result .

[atsio]

Re: HP Pavillion G6. no power

60 ohm is not normal. Did you clean the solder on U5 pads; What is the resistance on U5 pads (+3vpcu); What about U4;
Solder a wire on PC27, (+3vpcu side) and apply voltage (maximum 3v) and check if any current is drawn and if yes, check what is getting hot with a thermocouple.

[lorins_core]

Re: HP Pavillion G6. no power

60 ohm is not normal. Did you clean the solder on U5 pads; What is the resistance on U5 pads (+3vpcu); What about U4;
Solder a wire on PC27, (+3vpcu side) and apply voltage (maximum 3v) and check if any current is drawn and if yes, check what is getting hot with a thermocouple.

I already clean the u5 pads.

U5 pins have (+3vpcu side)
Pin#9 60 OHMS
Pin#22 60 OHMS
Pin#33 60 OHMS
Pin#96 60 OHMS
Pin#111 60 OHMS
Pin#125 60 OHMS.

apply voltage (maximum 3v) and check if any current is drawn and if yes, check what is getting hot with a thermocouple.

How they to that?

question need to back the U5 & PU6 chip on the board (install) and i perform the thermo coupler i dont know how to use this?

[lorins_core]

Re: HP Pavillion G6. no power

I already clean the u5 pads.

U5 pins have (+3vpcu side)
Pin#9 60 OHMS
Pin#22 60 OHMS
Pin#33 60 OHMS
Pin#96 60 OHMS
Pin#111 60 OHMS
Pin#125 60 OHMS.

apply voltage (maximum 3v) and check if any current is drawn and if yes, check what is getting hot with a thermocouple.

How they to that?

question need to back the U5 & PU6 chip on the board (install) and i perform the thermo coupler i dont know how to use this?

i wondered why the PU5 pins #8 (+3VPCU) Why only 0.6V remain?
then the PU5 pins #17 (+5VPCU) Why only O.2V First Plug the supply then 0v...


help me pls

[atsio]

Re: HP Pavillion G6. no power

Do you have a lab supply?

[lorins_core]

Re: HP Pavillion G6. no power

Do you have a lab supply?

Mr. Atsio i dont have.