HP DV7-1175 DC Jack replacement

[kats22]

Good Morning all,

I have a client (a friend of a good friend) who called me and said that their dc jack is loose and that it will not power their laptop anymore. They purchased 2 new ac adapters to test (one OEM and one Targus) and they don't power it on.

I know that the DV7 series have a dc jack separate from the mobo, as seen here:
http://cgi.ebay.com/DC-Power-Jack-HP-Pavilion-DV7-1175-DV7-1175NR-DV7-1177-/300416860540

How difficult is this install? Is is just removing the old dc jack and soldering in the new one? Replaced mobo's for dc jack probs but never just the dc jack itself.

Thanks for any help!

Adam

 

[NYJimbo]

The jack is a 5-7 pin connector that is a pain in the neck to rework. I would recommend buying the jack with the cable, not just the jack (search for "DV7 jack cable" and you should see them). The pins are very close together and some are just pins, not hooks or tabs, which are difficult to solder to unless you make some kind of connector first. Even if you solder them you have to shield each pin with hot shrink tubing as you will have to bend the cable tightly to one side to fit the jack back into the mounting area.

The tear down is pretty easy and you can get to the jack cable connector on the mobo without taking out the mobo. You even have a full color tear down:

http://www.insidemylaptop.com/disassemble-hp-pavilion-dv7-notebook/

as well as the HP manual:

http://h10032.www1.hp.com/ctg/Manual/c01918142.pdf

The tear down is easy, the jack rework is a pain. Just not worth the work for a few dollars more get the whole assembly.

But just FYI: Its a good possibilty the machine is dead. Those jacks are pretty solid, the looseness is often (not always) due to slippage in the jack holder.

 

[kats22]

Wow, thank you so much for the information, NYJimbo!

So with the dc jack and cable all I have to do it remove the old and install the new? No soldering? How does the jack mount to the mobo? Sorry for the noob questions, this is one area I am not too familiar with.

Thanks again.

Adam

 

[NYJimbo]

Wow, thank you so much for the information, NYJimbo!

So with the dc jack and cable all I have to do it remove the old and install the new? No soldering? How does the jack mount to the mobo? Sorry for the noob questions, this is one area I am not too familiar with.

Thanks again.

Adam

Slip on connector. Go look at them on ebay.

 

[usacvlr]

There are two versions of this jack. One has ears that you have to cut off before it will fit and the pin out is different.

 

[kats22]

Thanks for the info guys!

usacvlr, I will verify which one is needed before I have the customer order it. Thanks!

Adam

 

[NYJimbo]

Thanks for the info guys!

usacvlr, I will verify which one is needed before I have the customer order it. Thanks!

Adam

Like he said, check the cabling but is usually the one with the flanges. Regardless, take a look at the back of the jack in this pic to see what
you would have to rework if you did the soldering yourself.

http://www.laptopking.com/partpicture_LK.asp?ref=1013&category=dcjack

not alot of fun.

 

[kats22]

No joke! I will admit soldering is not my strong suite! I used to solder a lot when I was a kid, but that was just for putting new motors on my rc cars.

Now that my daughter is almost 7 I bought her one of her own rc cars and she is loving it. Brings back a lot of childhood memories.

Thanks again, NYJ

 

[NYJimbo]

No joke! I will admit soldering is not my strong suite! I used to solder a lot when I was a kid, but that was just for putting new motors on my rc cars.

Now that my daughter is almost 7 I bought her one of her own rc cars and she is loving it. Brings back a lot of childhood memories.

Thanks again, NYJ

Alot of the harness jacks are jokes. Two pair of wires, reds and blacks, twisted together with just a spot of solder holding them to the jack. You could rework them while drunk off your ass.

But this one is just too messy, stripping it down and rebuilding it. Its actually funny to see 5 pins on the jack, but 6 wires on the jack end of the cable and 4 on the connector end. You gotta take notes and partially strip the shielding to figure out what the f-ck they did with this thing.

 

[DarDar]

That is definitely some quality designing

 

[kats22]

Have the laptop in the shop right now.

It will power on and post, boot and function normally when the battery is installed only and when the ac adapter is plugged in AND the battery is installed. It does not recognize the ac adapter, however. It does not charge the battery.

If you remove the battery and plug in the ac adapter ONLY the laptop will power on for 3-5 seconds and die. All lights come on, fans spin, etc.

I removed the ram and hdd and tested in a test machine and they are fine. I disassembled the laptop down to bare bones and cleaned it out. Everything looks fine.........the dc jack is NOT loose, there is a little play but its fine. The cable from the dc jack to the mobo looks fine, from what I can tell.

I am on the fence if I should have the client purchase the dc jack and cable kit and have me install it because part of me thinks the mobo is the issue. But, the one big point that bugs me is that if the mobo is indeed bad how can it work on on just battery power. Doesn't make sense. (this is a close friend of a close friend of mine).

Any thoughts? Have any of you guys/gals seen this in the DV7 series notebooks?

Thanks.

Adam

 

[kats22]

Forgot to mention, the battery only has a small amount of juice left so I could not run a full diagnostic software suite (eurosoft). That is why I removed the ram and hdd to test seperately.

A

 

[kats22]

Just realized that the battery is getting a charge when the laptop is off and plugged in.

 

[Stoney]

Check if the adaptor is a 65w it should be a 90w. Or the adaptor may not work under load.

 

[kats22]

After further testing and researching it looks like this unit is one of the DV7 series notebooks that has the problem with overheating and cause major issues with the GPU. His ac adapter is the right 90w adapter, but it also gets so hot that it starts to melt. Another problem associated with these notebooks. He is talking to HP about possibly having them repair it for him (its right outside the 1 year supposedly)

Thanks for the help. Case closed...........for now.

Adam

 

[NYJimbo]

That is definitely some quality designing

I know this thread is over but I wanted to show anyone else why the DV4,5,6,7 series jacks are best replaced with the harness and you dont try to solder the pins yourself.

This is a DV5 jack with the original harness and still installed in the machine:

As you can see once you solder the pins you have to fold over the wires all the way against the body of the jack to make it go down a narrow runway. If you dont then you wont be able to close up the machine. So you have to put shrink tubing on each wire, solder the pins, heat the tubing so its shrinks, then apply hot glue so when you fold it they keep a little shape near the pins and dont pull out.

Its not worth reworking this jack and harness with a new jack, you can get the whole assembly on ebay for about $10-$15 more than the jack itself, sometimes you can find it for a little less.