Asus Model G501j , Board N501jw short at AC_BAT_SYS

[Sephir0th]

Re: Asus Model G501j , Board N501jw short at AC_BAT_SYS

Going to probe around and check the 1.05v rail like Reformatt suggested. Got side tracked yesterday. Will post results. But the rail i was checking below that i found the short on is posted below. There is a controller chip on that rail. I will be checking that today for restistance to ground.

P_VCORE_VSP_10 - *Shorted*
1. PC8012
2. PC8055
3. PR8051
4. PSL8006
5. PU8000

Picture of the area in question please where you measured the "short". I don't like to drive in circles...

[TheWizard]

Re: Asus Model G501j , Board N501jw short at AC_BAT_SYS

Picture of the area in question please where you measured the "short". I don't like to drive in circles...

Yeah sure thing. Totally understandable. Otherwise we are just at a Nascar race. Drive fast turn left! Haha Here is a pic of the shorted area. Thanks again.

[TheWizard]

Re: Asus Model G501j , Board N501jw short at AC_BAT_SYS

1.05VS rail:

R2706, R2539 R0614,R0313,Q7702,PJP8201,PJP8202 all continious to ground. But resistance to ground is higher from components on the front side of board rather than the back side. Can i inject voltage with the ITE off or that too dangerous for the CPU?

[Sephir0th]

Re: Asus Model G501j , Board N501jw short at AC_BAT_SYS

i finally realized you refer to the boardview without mentioning it. So now i want to understand why you randomly measured Pin 34 of the VRM controller without any reason? And when you do so, always share EXACT resistance to GND. Except you like, when the people here have to ask again, again and again.

So what value did you find at VCCSENSE Pin...?

Edit: Same for the +1.05VS rail ofc.

[TheWizard]

Re: Asus Model G501j , Board N501jw short at AC_BAT_SYS

i finally realized you refer to the boardview without mentioning it. So now i want to understand why you randomly measured Pin 34 of the VRM controller without any reason? And when you do so, always share EXACT resistance to GND. Except you like, when the people here have to ask again, again and again.

So what value did you find at VCCSENSE Pin...?

Edit: Same for the +1.05VS rail ofc.

My appologies. I am new to this. Not trying to cause headaches. Yes, i use the boardview. Because you cant rely much on the schematic for this board. The VRM controller measurement was probably because i didnt know the name of the rail i needed so i just searched boardview for P_VCORE.

VCCSENSE on PSL8006 shows 32.9 reisistance to ground.

1.05VS Rail:
JP2603 = 0.7
PJP8201 = 0.6
PJP8202 = 0.6
PT8201 = 0.6
PT8202 = 0.6
PT8203 = 0.8
Q7702 = 0.5
R0313 = 1.0
R0350 = 1.0
R0612 = 0.8
R0614 = 0.5
R2539 = 0.6
R2601 = 0.7
R2602 = 0.7
R2603 = 0.7
R2702 = 0.6
R2704 = 0.6
R2706 = 0.7
R2707 = 0.6
R2712 = 0.6
R2713 = 0.6
R2714 = 0.7
R2720 = 0.5
R2727 = 0.6
R2728 = 0.9
R5707 = 0.7
U2001 = GPU

[Sephir0th]

Re: Asus Model G501j , Board N501jw short at AC_BAT_SYS

So still, CPU Core rail and VCCSENSE measures absolutely fine and not(!) Shorted. This low values there are absolutely normal.

Meanwhile the +1.05V is shorted to GND. Lift the related coil from at least one pad and share on which side the short persists.

[TheWizard]

Re: Asus Model G501j , Board N501jw short at AC_BAT_SYS

So still, CPU Core rail and VCCSENSE measures absolutely fine and not(!) Shorted. This low values there are absolutely normal.

Meanwhile the +1.05V is shorted to GND. Lift the related coil from at least one pad and share on which side the short persists.

I don't see a coil with 1.05v attached on either one of its pins. Can you point me in the right direction?

[Sephir0th]

Re: Asus Model G501j , Board N501jw short at AC_BAT_SYS

I don't see a coil with 1.05v attached on either one of its pins. Can you point me in the right direction?

PL8200

Check resistance to GND there (any pad) again before lifting, to confirm

[TheWizard]

Re: Asus Model G501j , Board N501jw short at AC_BAT_SYS

PL8200

Check resistance to GND there (any pad) again before lifting, to confirm

Okay PL8200
Pin 1 = Constant pulsing
Pin 2 = 0.8


Removed coil.
Pin 1 = 2.761
Pin 2 = 2.7

[Sephir0th]

Re: Asus Model G501j , Board N501jw short at AC_BAT_SYS

And now we want to inject 1V into pin2 to confirm a shorted PCH.

[TheWizard]

Re: Asus Model G501j , Board N501jw short at AC_BAT_SYS

And now we want to inject 1V into pin2 to confirm a shorted PCH.

I have the wire connections ready. Just waiting on phone battery to charge. I need to get a straight up thermal camera and sell this ios Flir One pro. I will report back asap.

[TheWizard]

Re: Asus Model G501j , Board N501jw short at AC_BAT_SYS

And now we want to inject 1V into pin2 to confirm a shorted PCH.

Okay injected 1v @ 1a on pad 2 of PL8200. The board pulled a 1 amp draw. But nothing got hot on the board. At least not visible to the thermal cam. I tested front and back of board for heat.

[Sephir0th]

Re: Asus Model G501j , Board N501jw short at AC_BAT_SYS

1Amp might be not enough then. Concentrate on the platform controller hub (PCH). I'm pretty convinced it is the culprit.

[TheWizard]

Re: Asus Model G501j , Board N501jw short at AC_BAT_SYS

Try 1v @ 1.5 amps? Is this the PCH?

[TheWizard]

Re: Asus Model G501j , Board N501jw short at AC_BAT_SYS

My appologies. I am new to this. Not trying to cause headaches. Yes, i use the boardview. Because you cant rely much on the schematic for this board. The VRM controller measurement was probably because i didnt know the name of the rail i needed so i just searched boardview for P_VCORE.

VCCSENSE on PSL8006 shows 32.9 reisistance to ground.

1.05VS Rail:
JP2603 = 0.7
PJP8201 = 0.6
PJP8202 = 0.6
PT8201 = 0.6
PT8202 = 0.6
PT8203 = 0.8
Q7702 = 0.5
R0313 = 1.0
R0350 = 1.0
R0612 = 0.8
R0614 = 0.5
R2539 = 0.6
R2601 = 0.7
R2602 = 0.7
R2603 = 0.7
R2702 = 0.6
R2704 = 0.6
R2706 = 0.7
R2707 = 0.6
R2712 = 0.6
R2713 = 0.6
R2714 = 0.7
R2720 = 0.5
R2727 = 0.6
R2728 = 0.9
R5707 = 0.7
U2001 = GPU

U2001 = PCH not GPU haha

[TheWizard]

Re: Asus Model G501j , Board N501jw short at AC_BAT_SYS

1v injection @ 1.5 amps. Nothing noticable on thermal cam.

[Sephir0th]

Re: Asus Model G501j , Board N501jw short at AC_BAT_SYS

Try 1v @ 1.5 amps? Is this the PCH?

It is. It seems you need more current or a better thermal camera.

[reformatt]

Re: Asus Model G501j , Board N501jw short at AC_BAT_SYS

Just saying, @myth77 called it in post #2. Shorted EC and PCH. Game over man.

[Sephir0th]

Re: Asus Model G501j , Board N501jw short at AC_BAT_SYS

Agree. This board has multiple issues and it was pretty clear from the beginning that there is even a fatal fault which marks it as no-fix. However, thread starter wanted to continue, so...

[TheWizard]

Re: Asus Model G501j , Board N501jw short at AC_BAT_SYS

Just saying, @myth77 called it in post #2. Shorted EC and PCH. Game over man.

Yeah it sure sounds like it. What is the max current i can send and still be safe? Maybe try 1.8 amps?