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Launched September of 2020, product number is 2V654AV.

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Unknown SMD component, now melted on motherboard

Hi,

I am trying to identify a component on my HP Probook 430 G8 laptop Motherboard. I accidentally shorted the battery to this component.

Motherboard :

Model X8P

Year 2020

DA0X8PMB8F0 Rev: F

See photos of the component. I have lifted a trace when cleaning the area, but I believe it is fixable. I bought a 2nd laptop to try and help me get the first one working. I de-soldered what what looks to be the same component from the donor laptop.

The component is an 0603 from measuring 1.6mm between the solder tabs.

I used my DER EE DE-5000 LCR meter and get:

0.5 millihenry

0.010 milliohms

0.9 to 1.1 nanofarads

I am not sure what to order. It doesn't look like a capacitor, the resistance seems to low to be a resistor, and I can't find 0.5 millihenry inductors..... can you please help me order the correct part?

Broken laptop (Below)

(The orange led at the charge port fades in and out as orange)

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Donor board whose part I measured. (Below)

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I have now MAYBE identified the mosfet that is connected to the component.

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In case it's an inductor, you might find it searching not for 0.5 millihenry, but for 500 nanohenry, see for example https://www.mouser.it/ProductDetail/Mura...

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@dinoo_fixit Good point, 500nH is not a standard size, but 560nH is. I was thinkng it must be an inductor from the measurements but looking at the schematics posted by @jayeff I have not been able to identify it yet.

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Hi @dahappychappy

Here's the schematic for the motherboard that will help a little bit.

It shows the model (or type) number of all the components on the motherboard, next to each component drawn in the schematic. This will make it easier to source a replacement once you identify the component's board ID or designation. This is the same as its designation in the schematic

Unfortunately I cannot find the boardview file for the motherboard which would show the location and component designation (as per the schematic) of all the components on the board, making it easier to find in the schematic. You may have better luck.

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Thanks a lot for the schematic! I have probably looked at this for at least an hour. I could almost swear the chip beside the failed component is a mosfet, given the pins are paralleled. 2,3,4 and 5,6,7 up. Looks like pin 1 connects to a chip with 3t=8g s1e. Which I can't identify in the schematic. It is physically near the battery connector. I have looked throughout the pages to see where a component has 2,3,4 shorted and 5,6,7 shorted but can't seem to find it. I have looked for silk screening around the area. The big component close by looks like a large power resistor (1R0 138 47T) but can't seem to see that either.

Thanks for finding the schematic!

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@dahappychappy

On p.25 is the battery connector JP2 - left side of page (I think it is anyway - check if it has 10 pin connections on the board).

If it is the one then IF the component connects to the battery connector, use a DMM to check which pin it connects to.

The various leads connecting to the JP2 pins have the name of the lead and a small number at the end e.g. mbclk 13.

13 is the page number in the schematic and you need to find the corresponding mbclk connecting lead on that page i.e. pin 110 on IC IT8987

LQFP which shows mbclk 25 (points back to p.25)

Easier way to locate wires is to use the search function in your browser (Ctrl + f). then zoom in to find it highlighted. There may be multiple locations.

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@dahappychappy

Component PL2001 is a 1µH inductor in a 0630 smd package

As for component JP2002 it is a sensing resistor.

As to its actual resistance value I don't know but it should not test OL (open circuit)

Depending on the DMM you're using to measure the resistance of components, most likely a sensing resistor will measure 0.00 Ohms (short circuit) as the value of these sensing resistors is usually mOhms (milliOhms)

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I tried measuring continuity to the battery connector, but found no direct connection the the pads of the component I am looking for.

I think I have identified the mosfet that connects to the component though. I have added a new photo to the question.

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@dahappychappy

Here's a link to the boardview file for board model DA0ZHPMB8F0.

Click on the "more" link under the video to find the download link for the boardview file.

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dahappychappy will be eternally grateful.
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