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Laptop HP G6000 USB Ports are not working

nasolsi
nasolsi used Ask the Experts™
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Hi Experts,
I've got one question to you to check if I'm right or wrong. One friend of mine has laptop hp G6000 and I read a lots of aricles and forums that the motherboard on that model hp is unsuccessful on the market because of too many problems with nVidia graphic chip. The issue is that all usb ports stopped working and even the wireless card. None of them is pick up through BIOS, reinstalled OS, reinstalled USB controller form Device Manager, even I took the laptop apart and replaced all usb ports and wireless card with new ones and finally no luck. Before replacing usb ports I knew it might be bad motherboard or bad usb controller but decided to give it a try and I lost.
Can you please give me an advice where else to look into or what else should do or it is just faulty motherboard and I cannot do anything else!
Just to clarify only usb ports and wifi card are not working as the rest is fine. It is hp G6000 with Win7 installed.

Thank you in advanced!
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Top Expert 2012
Commented:
It's a faulty circuit connection, fixed by peforming a solder reflow http://www.nvidiadefect.com/hp-g6000-nothing-on-display-t93-10.html  You can do this with a heat gun or an oven, which forces the solder to make better connections.

http://www.laptoprepair101.com/laptop/2010/04/06/fixing-compaq-presario-v6000-motherboard-no-video-issue/

Author

Commented:
Hi Callandor,
I've already fixed the same models laptops before through performing a solder reflow on nVidia graphic chip but I know that that problem is related to no video display. I don't have video display problem. So how reflowing nVidia chip is going to affect on usb ports and make them work even on wifi card or which part of the motherboard I should perform solder reflow on? Do I need to perform solder reflow on the other side of the motherboard where the usb ports are soldered to.
Sorry that I'm asking these questions and I might be look as fool in your eyes but I don't understand the connection between reflowing nVidia chip and usb ports.

Thank you in advanced!
Top Expert 2012

Commented:
Some people had wireless problems, as well as video problems.  USB is part of the Southbridge, so these are considered chipset problems: http://www.cesgeekbook.com/2009/11/dv6000-no-video-no-wireless-issue.html

Author

Commented:
Hi Experts,
I've done nVidia's chipset solder reflow by using my heat gun on both sides of the motherboard and when I assembled the laptop back I got no video display. When I click on the power button the laptop is on for a few seconds then going off, then going back on and cannot get video display now. I reseated the RAM, even tested it one at time, took the battery,cd/dvd drive, wireless card out but still no luck. I think I demaged the motheboard and the problem got worse.
Is there any other chance to fix that video's issue and get it work again or I need to replace the motherboard this time which is not worth it.
What should I do to fix that mess?

Any help and advice will be really appreciated!

Thank you so much in advanced!
Top Expert 2012

Commented:
Well, the reflow isn't guaranteed to fix all the problems associated with the bad nVidia chipset, so don't feel too bad about it not working.  You can damage the motherboard if you use too much heat - I assumed that you knew how to do it, since you said you had experience from prior fixes.  Since it doesn't boot now, you can try doing it again, since there is a chance it might undo the damage.

Author

Commented:
Hi Callandor,
I've done reflow twice and still the same problem. Put a bit flux paste and heated for about 40sec with my heat gun, then let it cool down for at least 40 mins and nothing. I might be overheated the chipset and demage it.
If I try it again for third time I'm not sure it is going to make any difference.
What do you recommend to me?

Thank you in advanced!
Top Expert 2012

Commented:
It won't hurt to try again, since you have a nonworking motherboard.  Sorry, there isn't much that you can specifically do at this point to fix it.  Hopefully, this won't ruin your friendship with the loss.

Author

Commented:
Thank you Callandor!
I hope that won't ruin it either.
I'm going to try again and if it still doesn't work I'll bring it to computer repair centre to fix it and I'm going to pay for that because it's my fault, and I need to sort it out on my own.

Thank you once again for your help and you deserve all of the points!
All the best!