dv6000 wont charge or power on

[xboxhaxorz]

So i have the laptop apart, i put the ac/usb board on a preheater and used hot air to flow the solder. I then put fresh solder on the connectors underneath the actual ac port. The light will come on when plugged in, however it wont turn on. It will turn on with the battery that has been charged externally.

This is the part that needs to be replaced and its cheap.

http://cgi.ebay.com/HP-DV6000-65W-DC...5#ht_502wt_932

However, i want to verify that it is the cause before ordering it.

I dont understand electronics as well as you all, but i have all the tools. How would i go about using my multimeter to test and make sure this is the cause?

If the laptop turns on with the battery connected then would the mobo be fine? Or is it possible that part of the mobo is bad, the part being where it gets the ac power?

The power board has 2 cables, i assume a cable is for usb and the other is for the actual power.

Also the charger is not at fault, its a charger from another dv6000

[mattbrad2]

Re: dv6000 wont charge or power on

Just so I understand you correctly - the "light" you mention when plugged in; is this the blue light ring around the DC jack or the charge light on the front panel of the notebook?

If its not actually charging the battery, I would check the mosfets around the motherboard where the DC jack cable is located and also around where the battery is plugged in. They will show shorted in both directions when checked with a DMM. The other possibility is the Maxim power controller. It controls the actual act of charging the battery however you usually wouldn't get any standby voltage from it either so the laptop wouldn't turn on with an externally charged battery but I've seen stranger things.

[xboxhaxorz]

Re: dv6000 wont charge or power on

Yes it is on the ac jack. The power cord when plugged in does not charge OR turn on the laptop. The laptop turns on only with the battery. I will check the mosfets, but they are not on the mobo itself they are on the daughter board.

[mattbrad2]

Re: dv6000 wont charge or power on

You are going to need to check the mosfets on the motherboard, not on that daughter board. The only electronics on that board are for the USB connector. Follow the positive (yellow or red) wire from the motherboard connector and it should lead first to a P-channel mosfet (AO4407 probably). This is a common problem in these laptops. If it tests fine, you may have a problem with the power controller.

[xboxhaxorz]

Re: dv6000 wont charge or power on

http://img.photobucket.com/albums/v3...z/DSCN0210.jpg

This is a pic of the board, the ac plugs into that and then the 2 plugs go into the mobo. I took a look around the 2 plugs and did not locate a mosfet, i could have missed it though.

http://img.photobucket.com/albums/v3...z/DSCN0209.jpg

[xboxhaxorz]

Re: dv6000 wont charge or power on

alright i found this article from you pointing out the mosfet thanks
but my problem is different, the unit WORKS on battery power but not on ac power
AO4407 is responsible for for working off of battery power. since it does work of battery power but not ac, i dont think its that mosfet.

is this correct?

[mattbrad2]

Re: dv6000 wont charge or power on

alright i found this article from you pointing out the mosfet thanks
but my problem is different, the unit WORKS on battery power but not on ac power
AO4407 is responsible for for working off of battery power. since it does work of battery power but not ac, i dont think its that mosfet.

is this correct?

That is correct. More than likely it is a faulty power controller. I don't have a spare DV6k board around me right now but I believe these use Maxim 8734 controller. You'll see a small square IC near the battery contacts. These are a bear to replace. You can replace it with some flux and a lot of patience. Check digikey for a replacement. They should be about $6-7 for one.

[kiranfocuz]

Re: dv6000 wont charge or power on

here is no problem with Motherbord mosfets , only issue with Nvidia chipset . try to heat 150 digree heat for 1 minut . and wait 2 or 3 minut . try to On your laptop display will come . this Solution for maximum HP DV nvidia chipset serios

[skywalker]

Re: dv6000 wont charge or power on

here is no problem with Motherbord mosfets , only issue with Nvidia chipset . try to heat 150 digree heat for 1 minut . and wait 2 or 3 minut . try to On your laptop display will come . this Solution for maximum HP DV nvidia chipset serios

I dont see how this would work . unleaded solder reflow at 217+c

[Th3_uN1Qu3]

Re: dv6000 wont charge or power on

I dont see how this would work . unleaded solder reflow at 217+c

And lead-free reflows at even higher temp. 150C is the equivalent of hitting it with a hair drier. Sure, it'll work.... for a few days.

Anyway, this is an electronic not an electrical issue. A reflow won't do anything.