HP Envy won't turn, charge light on

September 30, 2018 at 09:25:02
Specs: Windows 10, i7 speed unknown/16GB
I bought an HP Envy 17t-S000 a few weeks ago, and was told it needed a new power jack (the center plastic piece was gone and it had 3 small bare wires in there).

The laptop is less than 2 years old, but out of the 12 month warranty. The previous owner said HP wouldn't replace jacks, and then later said it was too expensive, so she bought a new laptop instead.

I bought a replacement power jack and swapped it (plug-in connector, not soldered, connector plugged in the correct way). Charge light came on white. I installed the battery, then plugged in again, charge light was amber.

The problem: Pressing the power button when plugged in, with either the battery in or out, with only the battery, not plugged in, the power light flashes on for maybe 1/2 a second then goes out. When plugged in, the same thing happens, plus the charge light will go out, and then after about a second or a little more, the charge light comes back on.

I thought the power supply wasn't producing enough current under load (though the voltage tested fine), so I bought a replacement power supply. That didn't change the results at all.

There are 2 8GB RAM sticks. I've tried removing both and testing it, and reinstalling just just one and testing it, no difference.

There's a WiFi card installed, I removed that, no difference.

The SATA hard drive works fine when installed in my desktop computer.

I've tried pulling the battery and power, then holding the power button for 30 seconds to drain any current left and reset the CMOS, no difference.

I've pulled the CMOS battery and verified the voltage is good on it.

There's really nothing more I can disconnect, other than some daughterboards.

Any ideas what the problem could be?

Thanks in advance!
Eric


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#1
September 30, 2018 at 16:07:17
If the laptop works with the AC power inserted but no battery but does not work with the battery installed, then the battery is bad and probably has an internal short.

If it does not work with the AC only then it is either the power adapter (which you already eliminated by purchasing a new one) or the power jack or power board is bad. The power jack (where the plug goes into) may be a separate unit or may be part of the power board (or possibly be part of the motherboard in some cases).

HP site has online manuals and online repair manuals including part numbers and detailed pictures. I would suggest that you download all for your machine and look it over carefully. If the job appears one you can handle, look on Amazon and Ebay for the part numbers and get a suitable replacement. If you do not feel you can handle it, at least you know what is involved so you can approach a repair center with enough knowledge not to get ripped off.

You have to be a little bit crazy to keep you from going insane.


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#2
September 30, 2018 at 16:36:39
Thanks for the reply!

The power jack's connector goes directly to the DC in connector on the motherboard. Since it knows to switch between amber and white with the battery, my assumption was that that section was functioning correctly. But since it's the motherboard itself, there's nothing else to replace there.

I did leave off that the battery was causing the charge light to be orange for at least an hour, and then I went away from it and when I came back, the light was white. So I assume the battery was fully charged at that point, and it should run off the battery if not the AC power. But that doesn't seem to be the case.

So all I can tell with certainty is that the charging circuit on the motherboard is working, and nothing catches fire. :) But nothing beyond that.

I got the 2 parts through eBay and that worked out pretty well. It was only $25 total for the jack and power supply, and it's an OEM power supply.

It's a 17.3" touchscreen and would be an awesome deal if I could get it working, instead of having to part it out and hoping to get $125 back from it.

What parts are you suggesting? Since it's not a separate power board, etc, I don't know what other options there are to try.


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#3
September 30, 2018 at 17:04:45
"The previous owner said HP wouldn't replace jacks, and then later said it was too expensive"

How well do you know the person? Obviously jacks are replaceable, you just did it yourself. However, eBay isn't always the most reliable parts source. I assume this is what you got: https://www.newegg.com/Product/Prod...

What can you tell us about this >> "the center plastic piece was gone and it had 3 small bare wires in there"? What kind of explanation did you get from the previous owner about how it happened & how long the laptop continued to work, if at all, after it was damaged? Were those wires shorting out against each other?


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#4
October 1, 2018 at 12:51:38
Hmm, the one I ordered was this one:
https://www.ebay.com/itm/DC-POWER-J...

It seemed like the best price, and it arrived the day after it was shipped (the NewEgg one comes from China directly).

It could be the jack I suppose. I don't know the seller, but she seemed trustworthy. The laptop was in a box with a big bubble sleeve thing, and had just come back from HP's service in that box.

She didn't give me much detail when I asked. She said it had never been dropped or gotten wet, always used for their business. It appears to be in great condition without scuff marks, etc on the Aluminum case.

I'm looking at the old power jack. It's 3 wires that make up the center conductor, and they have separated. They're flared outward towards the jack opening, and the ground points in the jack are not touching them. I don't believe they could reach, the way it's put together. The ground points are not all the way around the barrel, they're in the upper left, upper right, lower left, and lower right. Then this 3 pointed center wire thing extends towards the plastic separating each of the points. I don't know if that makes sense, but I don't think they could contact each other. So the wires normally would touch each other, but not the outside.

The original power supply barrel is slightly oval shaped, like maybe it was crushed a little. I didn't get any detail on what actually happened, just that HP doesn't replace jacks. And the jack was so simple to replace, literally 2 screws and a connector to plug in.


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