HP Envy 15 cannot charge battery!

[opamp]

Re: HP Envy 15 cannot charge battery!

Ok remove PQ10 and check voltage on pin1 of the battery connector.

[grahamw01]

Re: HP Envy 15 cannot charge battery!

okay will do, should I put PQ13 and PQ15 back?

by the way, not sure if this helps but I will restate what I said in the first post, that this laptop works fine running off the battery when there is no power cable plugged in.

thanks

[opamp]

Re: HP Envy 15 cannot charge battery!

Yes put them back in. I know the laptop works good except for the not charging part. After you remove PQ10 I I want you to check it. It's a Pchannel mosfet so put pos+ prove on pin 8 and neg- prove on pin 1. It should have reading one way only.

[fddizon]

Re: HP Envy 15 cannot charge battery!

will it not blow pq3 if you remove pq10?

[grahamw01]

Re: HP Envy 15 cannot charge battery!

okay so with PQ10 removed the charging seems to work perfectly?! with no battery the battery pin is mV as observed in the other one, PL6 is 12.4V, when I put the battery in, the charging light turns on and doesn't cycle! so what does this mean?

thanks!

[opamp]

Re: HP Envy 15 cannot charge battery!

That means you found the culprit!! congratulations you just fixed your first laptop motherboard.

[grahamw01]

Re: HP Envy 15 cannot charge battery!

PQ15 resistances (good board bad charge):

pin1+ pin8- = no connection
pin1- pin8+ = 2.8 M ohms

PQ15 resistances (bad board good charge):

pin1+ pin8- = 1.6 M ohms
pin1- pin8+ = no connection

jees I have no idea what I have done, i think on the bad board good charge I could have got PQ13 and PQ15 mixed up or the wrong way round or something. (they do not have the text or pin1 mark anymore..)

[grahamw01]

Re: HP Envy 15 cannot charge battery!

will it just work fine now without that chip??

[opamp]

Re: HP Envy 15 cannot charge battery!

PQ15 and PQ13 are the same, so as long is pin one is where is supossed to be you will be ok. Try using some rubbing alcohol to clean the ic's.

[opamp]

Re: HP Envy 15 cannot charge battery!

will it just work fine now without that chip??

Don't try to power it up until you make sure everything is were is supposed to be. Replace PQ10 with a good mosfet use the one from the old board.

[Tuomo]

Re: HP Envy 15 cannot charge battery!

okay so with PQ10 removed the charging seems to work perfectly?! with no battery the battery pin is mV as observed in the other one, PL6 is 12.4V, when I put the battery in, the charging light turns on and doesn't cycle! so what does this mean?

thanks!

I'll try to explain what happened.

PQ10 MOSFET is to allow the power from Battery to +PWRSCR.

In this case PQ10 leak current in each direction.

This means that the 19V head directly to the Battery which cause problems.

You have to replace PQ10 with working one.

This was interesting project to follow thank you and Opamp.

[grahamw01]

Re: HP Envy 15 cannot charge battery!

I just replaced it and it is still doing the same thing. I think I mentioned at the start of this topic, I swapped PQ3 and PQ10 from board to board, the bad board still charges, and the good board doesn't.

By the way this is what I mean't before (I got the name wrong)

PQ10 resistances (good board bad charge):

pin1+ pin8- = no connection
pin1- pin8+ = 2.8 M ohms

PQ10 resistances (bad board good charge):

pin1+ pin8- = 1.6 M ohms
pin1- pin8+ = no connection

[opamp]

Re: HP Envy 15 cannot charge battery!

Ok check voltage on pin4 of PQ10.

[grahamw01]

Re: HP Envy 15 cannot charge battery!

think i just broke it even more there are no lights now.. i will play around with it tomorrow

[grahamw01]

Re: HP Envy 15 cannot charge battery!

I swapped PQ13 and PQ15 from the old board because I think I damaged PQ15.. now there is no lights at all. I think I just didn't solder it back in place properly.

[grahamw01]

Re: HP Envy 15 cannot charge battery!

got it playing its normal games again, voltage on pin 4 of PQ10 is 3.3V with no battery, and cycles between 16.5V and 4.6V with battery

[Tuomo]

Re: HP Envy 15 cannot charge battery!

got it playing its normal games again, voltage on pin 4 of PQ10 is 3.3V with no battery, and cycles between 16.5V and 4.6V with battery

I realize that the problem is not solved. So lets continue.

You found the reason why the charge is cycling.

PQ10 is to let power through only when the AC plug is not in place.

PQ10 PIN4 control PQ10 Open or Closed. When AC plug is on it should be Closed PIN4 = High state battery in or not .

First of all, you can make sure that it does so by measuring other system board PQ10 PIN4.

Battery ON and OFF and AC plug ON and AC plug OFF.

Then we can inspect why it do what it do.

[grahamw01]

Re: HP Envy 15 cannot charge battery!

I realize that the problem is not solved. So lets continue.

You found the reason why the charge is cycling.

PQ10 is to let power through only when the AC plug is not in place.

PQ10 PIN4 control PQ10 Open or Closed. When AC plug is on it should be Closed PIN4 = High state battery in or not .

First of all, you can make sure that it does so by measuring other system board PQ10 PIN4.

Battery ON and OFF and AC plug ON and AC plug OFF.

Then we can inspect why it do what it do.

Okay pin 4 is as follows:

ac ON bat OFF : 3.3V
ac ON bat ON : cycles 4.4V-6.6V-16.5V
ac OFF bat ON : 4.4V

Thanks

[Tuomo]

Re: HP Envy 15 cannot charge battery!

Okay pin 4 is as follows:

ac ON bat OFF : 3.3V
ac ON bat ON : cycles 4.4V-6.6V-16.5V
ac OFF bat ON : 4.4V

Thanks

Are those from charge working motherboard?

[grahamw01]

Re: HP Envy 15 cannot charge battery!

no. from the none charging one, I do not have PQ10 on the charging one at the moment. I can do that in just over 1 hour if you need it