Trying to identify blown component HP ENVY x360 - 15-cn1511na

[pcmacdoctors]

Hello,

I'm trying to fix a laptop (HP ENVY x360 - 15-cn1511na) that had trouble with an expanding battery.

After replacing the battery I could see that a small component right next to it has blown and the computer does not fully detect the battery.

It looks like a quick and easy fix but I'm having trouble identifying the broken component and finding a replacement.

I've attached pictures of all the idenifying data I can find.
The broken component seems to have "C96PH" printed on it and the board is labled as "Gale 4G WHL MB"

Any help would be very appreciated, thank you.

[piernov]

Re: Trying to identify blown component HP ENVY x360 - 15-cn1511na

Probably TVS diode array. Maybe SU0524A6GTR.

[SMDFlea]

Re: Trying to identify blown component HP ENVY x360 - 15-cn1511na

Probably TVS diode array. Maybe SU0524A6GTR.

The SU0524A6GTR marking code is 24A according to the datasheet .

https://datasheetspdf.com/pdf-file/9.../SU0524A6GTR/1

[SMDFlea]

Re: Trying to identify blown component HP ENVY x360 - 15-cn1511na

I think its a AZC099-04S (Amazing Microelectronic Corp.)

https://www.ebay.com/itm/324013465266
https://www.amazingic.com/en/product...ion/AZC099-04S

[piernov]

Re: Trying to identify blown component HP ENVY x360 - 15-cn1511na

https://cdn.badcaps-static.com/pdfs/...a183a57130.pdf
Most likely the same thing anyway

[pcmacdoctors]

Re: Trying to identify blown component HP ENVY x360 - 15-cn1511na

I think its a AZC099-04S (Amazing Microelectronic Corp.)

.

Thanks both of you for the quick replies. I think this one might be correct. Looking up that part I see one with C966H printed on it. That's very close or the same as is printed on mine.

Now to find one from a supplier closer than China...

[SMDFlea]

Re: Trying to identify blown component HP ENVY x360 - 15-cn1511na

https://cdn.badcaps-static.com/pdfs/...a183a57130.pdf
Most likely the same thing anyway

I agree.A few differences in the datasheets but i reckon either would do.Sometimes schematics list 2 or 3 alternative parts for these ESD diodes.

[mon2]

Re: Trying to identify blown component HP ENVY x360 - 15-cn1511na

Check Littlefuse for such parts. Most likely these offshore parts are clones of their devices.

Here you go:



These are common footprint parts but inventory is scarce..as seems to be the common trend these days.

Found another drop in replacement from Diodes:

p/n DT2041-04SO-7

https://www.digikey.com/en/products/...04SO-7/7353025

https://www.mouser.com/ProductDetail...rDZfd9XCaFhQ==

[pcmacdoctors]

Re: Trying to identify blown component HP ENVY x360 - 15-cn1511na

Check Littlefuse for such parts. Most likely these offshore parts are clones of their devices.

Here you go:



These are common footprint parts but inventory is scarce..as seems to be the common trend these days.

Found another drop in replacement from Diodes:

p/n DT2041-04SO-7

https://www.digikey.com/en/products/...04SO-7/7353025

https://www.mouser.com/ProductDetail...rDZfd9XCaFhQ==

Thanks! That's very helpful.
Also I had a look under the microscope to work out where pin 1 is and so I thought I'd upload a picture of that for anyone interested. You can clearly see now its definitely marked C96pH also.

[pcmacdoctors]

Re: Trying to identify blown component HP ENVY x360 - 15-cn1511na

Hello, just wanted to post an update.
I got the replacement component finally and replaced it.
The solder pad for the pin (ground I think) where it blew was actually lifted off the board but thankfully still attached.

Seems to all be working now so thanks to all who helped!

[pasqui]

Hi everyone!
Sorry for jumping into the thread after so long, but I wanted to ask for some advice since I have the same laptop and I'm experiencing a similar issue. The PC works perfectly once it's on, but it only powers on when connected to the charger. If I try to turn it on using just the battery, the power button doesn't respond at all no lights, no signs of life.
Also, the battery icon appears empty, but when I hover over it, it shows "100%".
Could this still be related to a faulty diode or another issue in the power circuit? I inspected the diode visually, and it doesn't seem damaged.

I'm attaching some photos in case they help.

Thanks in advance

[mon2]

Most laptop batteries have a BMS (battery management system) board onboard the pack. This pack communicates using the SMB (SCL / SDA) lines. Sometimes, there are TVS surge protection diodes on these pins and they get nuked from transients and shunt the communication between the pack and the main board. Then they must be replaced.

Remove all power. Meter in resistance mode. Measure the resistance to ground of each pin on the battery connector on the motherboard.

Post each measurement. Again, no power to the board and no battery while testing the resistance. We are mainly interested to know if the SCL / SDA pins are shorted or not.

[pasqui]

Hi, thanks a lot for the quick reply!
I tested the resistance on the 8 pins of the battery connector using my multimeter. I'm getting measurable resistance values on the bottom 6 pins, but the top 2 pins showOL (no continuity).

Thanks again for your help! Let me know if there's anything else I should check.

[mon2]

Post the actual measurements and their units of measurement. For example 50 ohms; 25k ohms, etc. Need the values to confirm if there is a short here or not.

[pasqui]

Hi, thanks again for your help!
I took the resistance measurements using a standard commercial multimeter, so the readings had some fluctuation (it was set to 2000K ohm range), but here's the approximate average I observed from top to bottom based on the photo I shared earlier:

• Pin 1 (top): OL
• Pin 2: OL
• Pin 3: ~150 kΩ
• Pin 4: ~400 kΩ
• Pin 5: ~500 kΩ
• Pin 6: ~500 kΩ
• Pin 7: ~50 kΩ
• Pin 8 (bottom): ~150 kΩ

Let me know what you think or if you'd recommend a next step. Thanks again!

[Sephir0th]

Your battery connector has no connection to GND?!

[pasqui]

Hi again, just a quick note:
I realized the problem might actually be my multimeter, it's an old, improvised one I'm using just temporarily, so the readings aren't very reliable. I definitely need to get a proper one soon.

That said, theonly pin that sometimes gives me a low resistance reading (but not consistently) is the last one at the bottom. Its value fluctuates a lot, jumping between OL and low resistance, which makes it hard to get a stable measurement.

Thanks again for your patience and help!

[pasqui]

I've just repeated the measurements using a properly working multimeter this time, and the resistance values on the 8-pin battery connector (motherboard side) are now more stable.
Measured from top to bottom (as shown in my earlier photo), here are the resistance-to-ground readings:
Pin 1 (Top): 244 kΩ
Pin2 : 78 kΩ
Pin 3: 219 Ω
Pin 4: 137 kΩ
Pin 5: 11,8kΩ
Pin 6: 108 kΩ
Pin7: 0,00 Ω
Pin 8 (Bottom): 0,00 Ω
Let me know if this pattern suggests a fault on any data or protection lines.
Thanks again for the fast support!

[Sephir0th]

There is still something wrong. Based on how the tracks at the connector look like, Pin 1 and Pin 2 are together, so there is no way to get different measurements there.

But this doesn't matter at all, since what I notice at Pin 3 and 4 is more critical. Assuming these are Clock and Data, one of those is definitely partial shorted. Which would usually mean, either the charging controller or the EC is partial fried, or even both.

[pasqui]

I had a closer look at the board, and i noticed there's a "BQ25708" series chip nearly, which i believe acts as the EC controller or battery charging controller in this case, is it possible to perform any voltage measurements directly on the EC chip to help diagnose whether it's partially working or damaged?
Also, i now strongly suspect that the tracks under the ESD protection array (marked C96PH) especially the ones connected to pins 3 and 4 and the one connected to pins 1 and 6 might be shorted internally or partially damaged. That would explain the lower resistance readings and the issue with battery communication?
Would it be a good idea to remove the ESD array to check if the short is cleared? Because i have two identical boards, both showing the exact same issue and on one of them, the C96PH ESD array has already been removed (one of the two boards had previously been inspected by a technician, who removed the ESD array and also added a resistor near the BQ chip, look at image attached) and i checked directly the same tracks are still shorted to some extent, so i can now almost certainly confirm that the short is not caused by the ESD protection array itself, but rather on the PCB side
Really appreciate your support! Thanks again!