Which part is onboard? Is it from the donor or from DK? Either way, can you share the topside part #? There should be a datasheet available for the component.
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The donor component is currently installed on the board. It was pulled from an identical board. I haven't yet purchased any components for this repair yet.
The datasheet can be found hereComment
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Yes, I would definitely test with a known good part here. Order a few spares. They are inexpensive.
The part # LSF0102DQER is the one you want = X2SON package.
https://www.digikey.ca/en/products/detail/texas-instruments/LSF0102DQER/5178276?gad_source=1&gad_campaignid=17336435733&gbraid=0AAAAADrbLlhEl4sNBDTOAhHifoLIroCfZ&gclid=CjwKCAjwv5zEBhBwEiwAOg2YKETDWhY4f5_B_rsqjxymvlyZ3uvLUqIc7tEYhlVyRAvkeq0zQEAs-RoCW30QAvD_BwE&gclsrc=aw.dsLast edited by mon2; 07-28-2025, 01:57 PM.Comment
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Back again with some new components from DigiKey installed. Some behavior is different, but still not quite right.
Components Replaced:
U5150 (RCLAMP3552T)
UD201 (LSF0102)
New Behavior:
With logic board fully installed, power adapter connected, but NO battery connected to logic board:
I2C_SMC_PWR_3V3_SCL: 3.25V
I2C_SMC_PWR_3V3_SCA: 3.25V
Taking same voltage measurement of the same lines WITH battery connected:
I2C_SMC_PWR_3V3_SCL: 0.607V
I2C_SMC_PWR_3V3_SCA: 0.76mV
Since I am now getting the correct voltage on the two battery lines WITHOUT the battery connected (after replacing U5150 and UD201), but then the voltage changes only AFTER the battery is connected to something that isn't acceptable, does that suggest that the battery itself and/or the battery flex cable may now be the culprit or could it be something else with the logic board?
I feel like we're getting closer...
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Disconnect the battery. While the battery is on your work bench, meter in resistance mode, measure the resistance to the battery ground of:
I2C_SMC_PWR_3V3_SCL
I2C_SMC_PWR_3V3_SDA
These will be on the battery connector itself. We are trying to confirm if the SMBUS interface is defective on the actual battery. Or you can test the same with another known good battery on the logic board.Comment
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Hello,
Namaste.
I have a Macbook A2338 that came in for turning on issue. It turned on once when i had it but then again went off. The amp meter but bootloop. The board was clean - no dust - no green .
I performed a DFU Revive. Got the error 4042. Assumed BAD SSD. But it turned on , worked well for 1 day and again went off.
Anything can be done ?The customer needs data -
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At first, I thought that this must be a battery issue. I went to replace the battery.... -
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I have an XPS 15 9520 with a damaged bios so I flashed another one from badcaps. in manufacturing mode I changed the service tag but unfortunately ssd is not detected and also the error -tpm device is not detected- please help me. I haven't changed the tpm chip yet. Thanks in advance
Service Tag: J2MSHW3
|Express Service Code: 41518077843
mother board LA-L402P REV 1.0(A00)... -
Currently Im trying to get this A2338 13" 2022 MacBook Pro M2 to function properly, Right now the trackpad and keyboard are not working but the power button and keyboard backlight are working. the Touch Bar shows display but does not respond to touch. I bought it on eBay and it was described as having a bad lcd. When I received it however I found that it was also missing the wifi and bluetooth antenna along with most of the screws hardware. it was also showing picture on the LCD but no backlight, I could also see some lines on the screen indicating the lcd was also somewhat damaged. on top...
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