Re: XPS 15 9570 will not charge but battery works
Thank you, that is helpful. Should I be able to desolder this part with a plain soldering iron or would I need additional tools?
bin_
Member
Last Activity: 05-25-2022, 06:53 PM
Joined: 12-24-2021
Location: Texas
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Re: XPS 15 9570 will not charge but battery works
Sorry, been a very busy few months! But I am back to looking at this. You can see in the first photo PQ1905. The diagram you attached shows five pins, but I see only four; do I have the right component?
Similarly, in the second photo, you can see PQ1904. While the diagram describes five pins, I see eight. Which are the correct ones to test?
Finally, I noticed that there is a label for PD1904 but the pads appear empty; you can see this in the third photo. Is this correct, or might a component have been knocked...Leave a comment:
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Re: XPS 15 9570 will not charge but battery works
mon2, 19.17V both sides of PL1900.Leave a comment:
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Re: XPS 15 9570 will not charge but battery works
SMDFlea, do you mean 1R0? That part was on there as pictured when I received this machine, so it seemed to work before. The two parts I replaced were PD1900 and PD1902.Leave a comment:
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Re: XPS 15 9570 will not charge but battery works
Here's a photo. White stripe is on the top for both....Leave a comment:
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Re: XPS 15 9570 will not charge but battery works
Parts arrived to-day, thanks very much for sending! I swapped the diode and now, with the DC jack connected, I measure the following:
PD1900 anode: 19.17V
PD1902 anode: 0.36V
PD1900 cathode and PD1002 cathode both: 18.74V
However, the charging light still does not turn on, machine does not power. Any thoughts on what I should check?Leave a comment:
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Re: XPS 15 9570 will not charge but battery works
(Edited from original) My bad, didn't see your reply. Thanks!Last edited by bin_; 12-31-2021, 11:36 AM.Leave a comment:
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Re: XPS 15 9570 will not charge but battery works
Will do. That's rough on the fridge, seems like under warranty the replacement should be free. Looks like maybe LG has to pay for spoiled food and such under the settlement terms? [url]https://topclassactions.com/lawsuit-settlements/consumer-products/appliances/lg-to-provide-cash-warranties-to-1-5m-consumers-over-fridge-defects/[/url]
You mentioned Arrow has free shipping but I'm seeing $43.99 as the cheapest option on the parts. Am I missing an option or something?Re: XPS 15 9570 will not charge but battery worksLeave a comment:
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Re: XPS 15 9570 will not charge but battery works
Do you know if either of these is the correct component? I'd like to avoid getting the incorrect one.Leave a comment:
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Re: XPS 15 9570 will not charge but battery works
I got a digital multimeter and, from the lack of a tone on the diode mode test, it appears that diode is bad. I'll plan to get 3 of those. It looks like the Micro Commercial Components is rated for 0.03A and the Nexperia is rated for 0.12A; does it matter which I order?Leave a comment:
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Re: XPS 15 9570 will not charge but battery works
I'm reading around 7k ohms for both.Leave a comment:
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Re: XPS 15 9570 will not charge but battery works
Thanks. I'm reading about 80 ohms in forward and 45000 ohms in reverse.Leave a comment:
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Re: XPS 15 9570 will not charge but battery works
Forgot to actually attach the multimeter picture; attached here....Leave a comment:
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Re: XPS 15 9570 will not charge but battery works
Thanks, Arrow looks like a better supplier with shipping. It looks like that first 0.12A part is the correct one? I'll plan to get 3 in case some get damaged while I work.
I'm glad to hear that 1R0 is correct and not an issue there. Any thoughts on how I can prevent this from happening again? Might the diode have just spontaneously failed?
I've attached a picture of my multimeter; I don't see a diode mode but perhaps I don't recognize it on this one. I'll look at getting a hot air tool for future repairs,...Leave a comment:
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Re: XPS 15 will not charge but battery works
Measuring with red at the top of that white stripe and the black on ground, I'm getting 18 ohms on PD1900 in x10 ohm mode, but for some reason I get 8000 in x1000 ohm mode. I'm not sure how to interpret this difference in readings. What do you mean by dual diode junction? I'm measuring on the white stripe side (top in previous photo).
Unfortunately, my multimeter lacks a diode mode; I'll have one with that capability in a week or so if needed but this one does not.
If the left diode is busted, what might have...Leave a comment:
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Re: XPS 15 will not charge but battery works
No, those numbers are flipped. 0V on top and 20V on bottom.
I'm measuring the top of both of those and read 160 ohms.Leave a comment:
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Re: XPS 15 will not charge but battery works
Thanks for the information.
I attached a photograph of the area around PD1900. I believe it's the small black component that is to the left of the "PD1900" label in the photo; if so, it shows around twenty volts on the top contact and 0 on the bottom. By the way, this board is refurbished and it appears that there has been some manual soldering work done on it already in this area; I'm unsure as to what the reason was for that as it happened before I owned the board.
I'm unable to test whether the...Leave a comment:
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XPS 15 9570 will not charge but battery works
XPS 15 9570 will run from battery but will not charge/run from USB-C or the DC jack. The charging light does not come on, even though it normally does when power is connected (regardless of whether or not a battery is in the machine). So it seems like something is wrong power wise. Battery is dead so it currently won't boot. Machine specs:
Dell XPS 15 9570
Intel Core i9-8950HK
Tried 32GB DDR4 2666 and 8GB DDR4 2400 RAM
Motherboard is a Compal LA-G341P
I've tried removing the battery, CMOS battery, RAM, trackpad, keyboard,... -
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Hi there and Merry Christmas. Came here hoping for some thoughts on how to repair an apparently dead laptop motherboard that can't charge.Leave a comment:
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