HP Envy 15 cannot charge battery!

[grahamw01]

Re: HP Envy 15 cannot charge battery!

No problems. Drawing is fine but i have to find which PIN is 2.

Is it AC OFF and AC ON or Battery ON and Battery OFF?

This is AC ON for battery off and on. I will get results with no ac soon.

[Tuomo]

Re: HP Envy 15 cannot charge battery!

This is AC ON for battery off and on. I will get results with no ac soon.

These two signals disconnection of the Battery is not relevant.

Measure AC ON and AC OFF.

After that can you check PQ44 PIN 1.

If PQ44 PIN 1 not 19V, remove PQ42.

If PQ44 PIN 1 is 19V, you do not need remove PQ42.

[grahamw01]

Re: HP Envy 15 cannot charge battery!

These two signals disconnection of the Battery is not relevant.

Measure AC ON and AC OFF.

After that can you check PQ44 PIN 1.

If PQ44 PIN 1 not 19V, remove PQ42.

If PQ44 PIN 1 is 19V, you do not need remove PQ42.

Voltages on pq44 are 19v 19v and 16.9v

[Tuomo]

Re: HP Envy 15 cannot charge battery!

Voltages on pq44 are 19v 19v and 16.9v

Here is some confusion if PQ44 PIN 3 =19V, then PQ10 PIN 4 = 19V?

Can you check PQ10 PIN 4 and recheck PQ44.

PQ44 should be PIN 1 = 19V, PIN 2 = 0V, PIN 3 = ?

[grahamw01]

Re: HP Envy 15 cannot charge battery!

Here is some confusion if PQ44 PIN 3 =19V, then PQ10 PIN 4 = 19V?

Can you check PQ10 PIN 4 and recheck PQ44.

PQ44 should be PIN 1 = 19V, PIN 2 = 0V, PIN 3 = ?

rechecked PQ44 and it is what i said, PQ10 pin 4 is

15V AC only
15V AC and BAT
BAT only - jumps from 2.3V to 1V as soon as checking

[Tuomo]

Re: HP Envy 15 cannot charge battery!

rechecked PQ44 and it is what i said, PQ10 pin 4 is

15V AC only
15V AC and BAT
BAT only - jumps from 2.3V to 1V as soon as checking

This looks as it almost right voltages on PQ4 PIN 4.

I think we are really close the problem.

PQ44 PIN 1 = 19V OK.
PQ44 PIN 2 = 16V ??? This may be low enought to OPEN PQ44?
PQ44 PIN 3 = 19V OK. This means at PQ44 is OPEN.

It seems that the problem is the PQ44 or PQ49 and possible PQ45.

Can you put PQ10 back into place and measure PQ10 PIN 4. PQ49, PQ44, PQ45.

If those voltages stay, charging should (nearly) work.

It may be at PQ49 not open enough to get through enough current through PQ44.

To be sure you can measure above from charging board.

[grahamw01]

Re: HP Envy 15 cannot charge battery!

This looks as it almost right voltages on PQ4 PIN 4.

I think we are really close the problem.

PQ44 PIN 1 = 19V OK.
PQ44 PIN 2 = 16V ??? This may be low enought to OPEN PQ44?
PQ44 PIN 3 = 19V OK. This means at PQ44 is OPEN.

It seems that the problem is the PQ44 or PQ49 and possible PQ45.

Can you put PQ10 back into place and measure PQ10 PIN 4. PQ49, PQ44, PQ45.

If those voltages stay, charging should (nearly) work.

It may be at PQ49 not open enough to get through enough current through PQ44.

To be sure you can measure above from charging board.

Thank you, unfortunately I think there is a lot more wrong with this motherboard now, sometimes no lights come on at all, so I keep reheating some of the components I have played with and then lights will come on and it will charge (without PQ10) but it keeps breaking again with no lights.. I just brought the motherboard home with PQ10 in place and tried to turn it on and it just seems completely dead now.. I will try to resolder everything again on Monday

[grahamw01]

Re: HP Envy 15 cannot charge battery!

also, PQ44 on the board that does charge is always 19V, 19V and 0V

[Tuomo]

Re: HP Envy 15 cannot charge battery!

Thank you, unfortunately I think there is a lot more wrong with this motherboard now, sometimes no lights come on at all, so I keep reheating some of the components I have played with and then lights will come on and it will charge (without PQ10) but it keeps breaking again with no lights.. I just brought the motherboard home with PQ10 in place and tried to turn it on and it just seems completely dead now.. I will try to resolder everything again on Monday

Ok. If you want check why no light or power.

1. +PRWSRC = 19V

2. ALLWAYS Voltages PU9 PIN 7 LDO 5V.

3. PL5 3.3V

4. Press Power Button and check NBSWON should go 3.3V -> 0V -> 3.3V

5. DNBSWON 0V -> 3.3V

6. SUSB# and SUSC# 0 -> 3.3V

7. S5_ON = 3.3V

This tell you if U33 is working or not. You can test both your boards.

[grahamw01]

Re: HP Envy 15 cannot charge battery!

it looks like PU9 pins 6,7,8 are all connected yes? If so then pin 7 on the charging board is 19.2V??

Anyway, PL5 on good board bad charge is ~mV, PU9 pin 7 is 6V

[Tuomo]

Re: HP Envy 15 cannot charge battery!

it looks like PU9 pins 6,7,8 are all connected yes? If so then pin 7 on the charging board is 19.2V??

Anyway, PL5 on good board bad charge is ~mV, PU9 pin 7 is 6V

PU9 PIN 7 LDO = 5V, you can check PC133.

PU9 PIN 6 IN = 19V you can check PC134.

PL5 = 3.3V

Can you check again please.

[grahamw01]

Re: HP Envy 15 cannot charge battery!

PU9 PIN 7 LDO = 5V, you can check PC133.

PU9 PIN 6 IN = 19V you can check PC134.

PL5 = 3.3V

Can you check again please.

Yes they are exactly correct on the bad board good charge.

on good board bad charge PC133 oscillates from 2V to 0V every second, PC134 is 6V

[Tuomo]

Re: HP Envy 15 cannot charge battery!

Yes they are exactly correct on the bad board good charge.

on good board bad charge PC133 oscillates from 2V to 0V every second, PC134 is 6V

Good charge board is ready to go next step.

Bad charge board has short circuit.

You can measure resistance PL3, PL5, PL6 and compare them second board.

I mean black probe earth and red probe PL3 or PL5 in diode mode.

[grahamw01]

Re: HP Envy 15 cannot charge battery!

Good charge board is ready to go next step.

Bad charge board has short circuit.

You can measure resistance PL3, PL5, PL6 and compare them second board.

I mean black probe earth and red probe PL3 or PL5 in diode mode.

do you think the original board can be fixed? i am tempted to but a new U33 for it.. this motherboard broke because of overheating, it just died one day and never worked again.

Like I said, when the battery was plugged in with the power cable and the power button was pressed, the chipset (that looks like a GPU) gets very hot and that is the only sign of change. I was not aware of U33 getting hot as it was underneath the wifi card.

[Tuomo]

Re: HP Envy 15 cannot charge battery!

do you think the original board can be fixed? i am tempted to but a new U33 for it.. this motherboard broke because of overheating, it just died one day and never worked again.

Like I said, when the battery was plugged in with the power cable and the power button was pressed, the chipset (that looks like a GPU) gets very hot and that is the only sign of change. I was not aware of U33 getting hot as it was underneath the wifi card.

Chipset problem occurs quite frequently.

You can try Reflowing that chip, it may help.

U33 can check by measure NBSWON etc.

It is worth of a try.

[grahamw01]

Re: HP Envy 15 cannot charge battery!

PL3 PL5 and PL6 have 0 resistance both ways on both boards

[grahamw01]

Re: HP Envy 15 cannot charge battery!

Chipset problem occurs quite frequently.

You can try Reflowing that chip, it may help.

U33 can check by measure NBSWON etc.

It is worth of a try.

I tried reflowing it a few times it didnt help, I don't know what you refer to with NBSWON, and other things like DNBSWON, SUSB, SUSC etc..

[Tuomo]

Re: HP Envy 15 cannot charge battery!

PL3 PL5 and PL6 have 0 resistance both ways on both boards

I was not expecting quite such a low resistance.

Did you put black probe USB earth or something like or did you just measure plain coil?

You can also put second probe DC IN and somewhere board earth to see if VIN is shorted.

[grahamw01]

Re: HP Envy 15 cannot charge battery!

I was not expecting quite such a low resistance.

Did you put black probe USB earth or something like or did you just measure plain coil?

You can also put second probe DC IN and somewhere board earth to see if VIN is shorted.

oops okay, good board bad charge: PL5 is 17.5 ohms, pl3 is 28kohms, pl6 is 8Mohms

bad board good charge: pl5 is 6 ohms, pl6 is 11 Mohms, pl3 is 16 Mohms

I don't really understand what I am doing, the values constantly change, why is that?

[grahamw01]

Re: HP Envy 15 cannot charge battery!

I think there is a problem with PQ13 and PQ15, it was when i swapped these it developed the no light problem. I cant access PQ15 pins because PL6 is in the way, I tried to remove PL6 but it would not come off, I even cracked the outer case of PL6 with the tweasers because it got so hot, but it did work for a while shortly after this so I don't think PL6 is actually damaged