AJ847.63e
Senior Member
Last Activity: 03-12-2025, 07:38 PM
Joined: 08-06-2020
Location: Amazon
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No, 53.6K. And thats both on this board and on the other board that was working. -
LDO_1V8: 1.8M
LDO_3V3: 53.6
SDA: 21.8K
SCL: 21.8kLeave a comment:
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TPS65988Leave a comment:
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3v3 LDO = 6.5K
Does this chip have a 5V LDO? According to the datasheet that is only for the C variant (RT6256C)
...Leave a comment:
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Sorry didn't do the rest because I thought there's no point if the PCH is cooked.
Starting from the small one on the bottom left of the board (charging port side):
20k, 20k, 20k, OL, 67 (Bottom left cutout of copper RAM shield), 73, 52, 71, 21K.
What do you mean that's not a way to test if the PCH is faulty? I thought it should not be getting extremely hot in just one point where the rest of the die is stone cold. Diffused spread out heat yes that would be fine, as it's generating it's rails. But not just the top tip of it. I'd post a pic, but it blinks so fast...Leave a comment:
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Looks like the PCH has been hit, popped it under the thermal cam and removed the heatsink and you can see the tip of it pulsing in sync with the LDO chip.
Coil resistances starting from the top left of the CPU 19.5 4.8, 4.8, 7..Leave a comment:
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Unfortunately, it wasn't the RT6256BGQU.Caved in and swapped it from the known working board but still same symptoms. 😓.
What else would you expect to get damaged when plugging in the battery upside down? Battery connector diode readings match the known good so I'm puzzled.
Only thing getting slightly warm apart from the 3.3/5V LDO is the TPS on the back of the board but its only getting to 38c and all its pins match the diode measurements on the KG board....Leave a comment:
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That was just crap from my cotton swab, took me a good 15 minutes of ipa and different variations of markers and an angled torch to try fill in the writing to make it legible....Leave a comment:
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Does anyone know if there is any boaedviews / schematics that are similar to this model since the exact ones are not available? I found a tiger lake one which looks similar physically but components wise it’s completely different.Leave a comment:
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Thank you. Dam none of our donor boards have em so I’ll have to order them in.
very strange that the diode mode measurements on the chip itself and the battery connector are the same between this board and the known good.Leave a comment:
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HP Spectre x360 -DA0X36MBAE0 wont turn on after battery change - Chip identification required
i all,
Cab anyone identify this chip? Pics attached. It's marked L8=6E 74L.
History: laptop came from a e-cycler. Dropped off a few laptops wanting to get rid of them so he asked if we wanted them, apparently he tried swapping the battery on this one and acidentally broke the tip of the battery connector and plugged the battery in upside down.
All readings on the battery pin seem normal though (comparing to a working same model board).
Connecting the charger you can see the above mentioned chip pulsing so it looks like its going into protection mode, but checking... -
For those interested, it was the suspected cap and indeed the BV and schematic are for a different model. Or incorrect. Removed the cap and short was removed, did some continuity checks and it seems like this is just a smoothing cap sitting on +AC_CHG_In. Any idea what value it would be as it would be nice to replace it?Leave a comment:
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HP Spectre x360 - 13-4005tu DA0Y0DMBAF0 . REV: F..boardview & schematic
Hey All,
Just wanted to see if anyone has the above correct schematic and BV for this model. It seems like there are different variations with the exact same board label and revision as I've found BVRs labeled " DA0Y0DMBAF0 Rev F" which is the board label on the board I have here, but it does not match the board. The board I have has a large MLCC on it (where PR96 is) and when I continuity check it to the lines matching the BVR it does not go to where the BVR says it does, and the BVR lists it as PR96 when it is clearly a MLCC. I thought the revisions maybe mixed up in the... -
Should clarify everything is up before RSMRST#_KBC, RSMRST is 0V and not STG. I've confirmed 3V3 is present on all of it's pins on the SMC, as is AC IN and KBC_PWRBTN#. PM_SLP_SUS# is present but S4 is missing. PU4501 see,s fine, removed both the mentioned resistors and they measured as per the schematic. 9.64v en2 @ PR4509 & 3.34 FOR EN1 @ PR4515....Leave a comment:
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Both PR4508&9 are reading as per the schematic. Turns out there was a tiny piece of metal in between pins 115 and 116 on the SIO so I guess that was why VCCSA was up. Very strange as VCCSA was up when I first got the board and before I removed it from the chassis, as soon as I took it out of the chassis it disappeared for quite a while before coming back a few days later. Now the boards back to drawing 0.017A and briefly dips down to 0.007A every few seconds. Both -4 rails are up as is PM_PWRBTN#. Everything seems to be working up to stage 0 RSMRST#_KBC. AC_IN# and PM_SLP_S4 are missing and...Leave a comment:
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Thanks for the assistance. I Think the cpu on this thing is dead unfortunately. I hooked the board up again to my dc supply this morning and now it’s pulling .067A when it originally was at .016/17 and dipped down to .007 briefly.
I checked voltages and again we’re still stuck at step -4 and EC outputs are missing. Though strangely VCCSA is present 1v and if I take the cpu heatsink off you can see a very distinct hotspot the second you turn the power supply on than it shuts off and after 40 seconds heats back up and stays up.
I’ll recheck the reset line and 3D3V_AUX_S5...Leave a comment:
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It's a paid forum hence why I didn't link to it.Leave a comment:
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HP Pavilion X360 14-dh1084tu Suspect faulty SIO
Hi all,
I've got a mainboard FAROE DIS X32 MB MV 18742-1 0GG03.0011.
Original state was I was getting 3v on the power button. Went through the schematic power sequence and we seem to be getting stuck at point -4. The outputs from the SIO 5V_S5_EN and S5_EN are missing, and the inputs for PU4551 seem wrong. 1.36V and 9.6V for En1 and EN2 respectively. At first I was getting 3.34V on EN1 but it's seemed to have dropped. PWR_5V_FB is 0.6V.
Checked all around the board can't see any shorts, except around the dimm slots and CPU so I'm assuming that's normal. 180... -
Managed to find the schematic on vinafix despite there only being BIOS on their yesterday 🤷♂️.Still can't find the boardview though.
Something screwy is going on. Yesterday arvo when I first took a look at this the TPS was getting hot so I started to look around for some info on it. Came in this morning found and printed out that page of the schematic and wrote resistance measurements for all the pins for the TPS. Pin 15 which is the LDO was 1.5M. All the pins read normal, so I connected the charger went over it with the thermal camera and the ISL charge IC was getting warm...Leave a comment:
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Latitude 5521 - broadmoor 15 TGL-H 12L 5v 600ma can anyone identify this chip?
Hi all,
got a latitude off of a old colleague which is stuck at 5v and not turning on no signs of life.
ive done some digging and it seems like pu4501 (5193 ti 1a8 adgh is the chip markings) is shorted. Getting up to around 74c. Haven't removed it yet because i haven't been able to confirm what chip it is.
Googling the markings brought up only one result, tps 51396 but the markings are 51393 so I'm assuming it's a tps51393 but googling that it seems like the chip engravings are different to the one I have so I wanted to confirm whether my assumption was right...Last edited by AJ847.63e; 07-02-2024, 06:46 PM.
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