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sekidata's latest activity
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Ssekidata replied to the thread 820-02098 board with no audio (A2442).Success! I found that one of the right speaker amps was also liquid damaged (UR760). Replacement restored sound on speakers. Apparently...
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Ssekidata replied to the thread 820-02098 board with no audio (A2442).Both measure 0.32 in diode mode and 1.2V in voltage mode. No shorts there. Correction: I do get sound through headphones now, just not...
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Ssekidata posted the thread 820-02098 board with no audio (A2442) in Macbook Logic Board Repair Questions.This machine was exposed to liquid and would not start up. It initially presented with corroded left speaker amps, a shorted backlight...
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Ssekidata replied to the thread A2681 Air with USB-C data line issue (820-02536).I got the port to work by replacing JE701. A pin must have been bent and not made contact.
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Ssekidata replied to the thread A2681 Air with USB-C data line issue (820-02536).Diode mode readings are identical between the two USB ports. I forgot to mention that along with the three CD3217s, I had to replace...
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Ssekidata posted the thread A2681 Air with USB-C data line issue (820-02536) in Macbook Logic Board Repair Questions.This 820-02536 came in with 2 of 3 CD3217s shorted. I replaced all 3 CD3217s from a donor board, along with the 2 TBT ROM chips (U5560...
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Ssekidata replied to the thread 820-02536 board Air 2022 A2681 with power cycling on USB.It’s still the same cycling as I wrote earlier. Both are steady for a few seconds (12.3 and 3.8) until the charger resets and all rails...
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Ssekidata replied to the thread 820-02536 board Air 2022 A2681 with power cycling on USB.If I can't find any shorts on any secondary power rails, why are the PMUs cycling on and off? How do I find out why the charger resets?
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Ssekidata replied to the thread 820-02536 board Air 2022 A2681 with power cycling on USB.All pins on UD200 measure good - identical to a known good board. On battery power alone, the AON rails (PPBUS, PP3V8, PP1V8, PP3V3)...
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Ssekidata replied to the thread 820-02536 board Air 2022 A2681 with power cycling on USB.With a battery connected, PPBUS stays at 11.6V. When I plug in a charger, PPBUS cycles between 11.6 and 12.3V.
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Ssekidata replied to the thread 820-02536 board Air 2022 A2681 with power cycling on USB.The battery connector was internally shorted. Removal of the connector removed the short. Now onto getting a new connector and back to...
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Ssekidata replied to the thread 820-02536 board Air 2022 A2681 with power cycling on USB.I just found out that PPVBAT_AON_CONN is 15Ω to ground. When I inject 3V into PPVBAT_AON_CONN, the only thing getting warm is the CPU...
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Ssekidata replied to the thread 820-02536 board Air 2022 A2681 with power cycling on USB.Unfortunately I don't have a charged battery or a functional A2681. Anything else you would check?
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Ssekidata replied to the thread 820-02536 board Air 2022 A2681 with power cycling on USB.I did and nothing changed at all. The battery could be empty though. I need to verify on another A2681 machine.
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Ssekidata replied to the thread 820-02536 board Air 2022 A2681 with power cycling on USB.All LDOs for both PMUs are there, some briefly, some steady.