kodox
Badcaps Veteran
Last Activity: Today, 01:21 PM
Joined: 07-12-2017
Location: West Java
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schematic is not the same as the boardview and also not complete, but thank's for your effort to shared it here... -
thank you allLeave a comment:
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what ic is this, it measure negative rail of battery while battery resistance to common ground measured .1 ohm on my meter
laptop brand: itel
board number: N140JAL27_MB_V10...Leave a comment:
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thank's for the script, it worked on Lenovo IdeaPad 3 15IML05 bios which is use a DDR4 onboard ram, but i don't remove the chip from the board...Leave a comment:
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thank you all...Leave a comment:
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Thank's all...Leave a comment:
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original mosfet is using AONY36354, yes i thought so, higher rated mosfet should do the job without issue. but not in my case and i don't know why, it drive me nutz for almost a month so wrapped it up as soon as the unit working, thank's all for helpLeave a comment:
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Thank's for bv & schematicLeave a comment:
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found the culprit!!!
it was replacement mosfet for PQB2, at first i'm using QA3118 mosfet assuming it has a bigger "ID" based on datasheet, after replacing it twice without resulting any progress i ordered same part number that came with the board.
upon arrival immediatelly changed the QA3118 and voila, the board came alive even without battery attached & would charge the battery from 0% to 100% without issue (except for heat).
hope this help someone with same caseLeave a comment:
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the unit i worked on use 3S battery, i think it should have 12.6V on main power rail sir, the schematic on first post it's LA-K061P and it uses 4S battery that's why it 's written as +16.8VB on main power rail
on the first post i wrote "replace bq25710 and all related mosfet to it"
at first plug power adapter pin #4 (CHRG_OK) has 3.2V but after 1-2 second it pulled low (0V), measure resistance to gnd (without any power applied to the board) it's on range between 20-30 kilo ohm, even i tried removing capacitor C255 near UEC1 it still pulled low after 1-2 seconds...Leave a comment:
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voltage marked on the battery: 11.1V (Nominal) & 13.3V (Max. Charge Voltage)
voltage at the battery connector: 12.5V (first time testing after replacing BQ IC & mosfets) & 11.8V (before start posting)
on datasheet there were no pin marked as VCC in this BQ sirLeave a comment:
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ThinkBook 15 G3 ACL Not Charging Battery - LA-K602P Board
since i couldn't find schematic or boardview for this model (LA-K062P), i use closest board model found here [url]https://www.badcaps.net/forum/troubleshooting-hardware-devices-and-electronics-theory/troubleshooting-laptops-tablets-and-mobile-devices/schematic-requests-only/107087-lenovo-thinkbook-14-g2-are-flv3a-la-k061p-schematic-and-boardview[/url]
the schematic share same marking for each component, using same PD-Controller, same BQ25710, the only different is the battery cell used. LA-K061P uses 3S battery while LA-K062P use 4S battery per schematic.
what i've done:... -
thank's for helping, but the problem still exist. i think the SOC gone bad...Leave a comment:
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Thank youLeave a comment:
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Someone please had a look to this bios dump, it's not detecting a drive attached to M.2 slot or sata port and confirmed that all the drive i tried is working on other unit.
i've try bios from post #8 but the result still the same, tried also reflowing cpu & M.2 slot without any changes. just to convince myself the fault not in bios section
IdeaPad 3 14IGL05
SN: PF32K3C2...Leave a comment:
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Thank's manLeave a comment:
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i think it's an ec bios you gave sir, motherboard behavior changed after flashed to a fresh chip, 80% power rail present except VCORE & VCCGT. tried flashing main bios (again) nothing changed. i think PCH is broken, well that's for another thread to tell about.
anyway, file you gave it is working. thank's, you've done amazing work 🍺...Leave a comment:
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thank's i'll try it (finger crossed)...Leave a comment:
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i use RT809F with software version 20240116, i said tried to erase just to make my self clear that the chip is broken or somehow broken that even trying to erase will result same error. i do have another MX25L8006E chip and worked fine using same programmer for the last two years & that software version almost a year and i always desolder the chip and never used a clip to program a bios chip or other rom chip from the begining i purchased RT809F programmer.
the link you mentioned to try the bios file on post #3, i already did and even trying for yoga S940-IWL model, i flashed...Leave a comment:
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thank's for the info but, i tried almost all the bios image in this forum and all bios image is for U2501 (main bios) based on boardview & schematic i found here [url]https://www.badcaps.net/forum/troubleshooting-hardware-devices-and-electronics-theory/troubleshooting-laptops-tablets-and-mobile-devices/schematic-requests-only/109020-lenovo-yoga-s940-14iil-schematic-needed[/url], i flashed & re-flashed the bios i've found before realizing that the EC has it's own chip for it's firmware and all the bios flashed had a same result as the original bios.
or maybe main bios also...Leave a comment:
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