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    [SOLVED]820-3437 backlight works for a split second.

    Do you have a picture the entire time?
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    820-3437 does not post

    Got an 820-3437 that came in dead. Corrosion only around JTAG, so removed JTAG to get the fan to spin, but now it does not post (no light on the mouse). CPU vcore is 1.5v. The fan also immediately spins up, not on and off a few times first. It is also spinning at max RPM.
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    Is there any hope for 820-2850 boards with obvious GPU distorted display issues?

    I had one that was bad screen assembly last week. Really did look like a GPU issue with lots of green lines running through, so don't forget to rule those out.
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    820-2915 power cycling

    I know, I thought the same thing but I'm really not getting anything. It's possible that my multimeter is just too slow to pick it up, but I don't have an oscilloscope.
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    820-2915 power cycling

    Beat you to it :) see above.
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    820-2915 power cycling

    Q7812 doesn't seem to have anything on its gates, but Q7830 does cycle to 0v on its gate.
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    820-2915 power cycling

    No ALL_SYS_PWRGD, and PP3V3_S0 isn't coming on all the way (less than 1v).
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    820-2915 power cycling

    S5_PWRGD is cycling high-low. I don't get CPU vcore. It's about 7 ohms to ground, doesn't seem like a short but don't have a good board to compare to.
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    820-2915 power cycling

    Came from another shop, so not much. Looks clean, no noticeable liquid. PPBUS_G3H is steady 12.5v.
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    820-2915 power cycling

    820-2915 seems to be power cycling. I get bursts of the S3 and S0 rails. SMC_PM_G2_EN and P3V3S5_EN cycles high-low. Can't find any shorts or heat on the board. PPVRTC_G3H also seems to be cycling, but between 3.3-3.4v only.
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    macbook air 2015 board 820-00165 problem with loading osx after efi reprogramed

    PM me I have a BIOS with clean ME you can try.
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    820-3115 p3v3s5_en_l

    Replaced U7941 twice and P3V3S5_EN_L was still high. U7941 had 3.42v on vcc. Shorted out C7942 though and the fan spins... Any ideas?
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    820-3115 p3v3s5_en_l

    Will check and yes.
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    820-3115 chime but no display

    USB mouse light up?
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    820-3115 p3v3s5_en_l

    820-3115 no power, no PP3V3_S5. Q7221 pin 2, 5 are 3.4v, which means the U7200 entrip will not enable the PP3V3_S5 regulator. However, I cannot figure out for the life of me how U7941 drops P3V3S5_EN_L. Is it internal? So when SMC_PM_G2_EN is present on pin 2, then U7941 will set the output...
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    [SOLVED]820-2838 Won't turn on from Keyboard.

    Only thing this can be is a corroded connector, otherwise the board is fine and it is a parts issue.
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    [SOLVED]820-2838 Won't turn on from Keyboard.

    Pin 3 is ground. There is no way it shows 3.42v. I'm going to disregard that as a typo. This is likely going to be a broken trace. Check the resistance from the trackpad to U5010 along SMC ONOFF L.
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    820-4924 bios

    Worked great, thanks. Not sure why I couldn't find the serial earlier.
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    820-4924 bios

    Another shop sent me an 820-4924 that they tried to flash the bios on but failed. The chip was missing so I pulled one off a donor board and put it in my TL866 to program with a new ME region. However, once I dumped it it looks like junk -- no serial number or "hwc" anywhere. Does anybody have...
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    820-00164

    USB mouse light up?
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