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working on a1990 that was working but had failed usb port, replaced the bad cd3215 (ub300) but had no power after, replaced ub400 still no power, chips i was using were bought online, figured maybe the was bad, so i pulled chips from donor board and reballed, anyhow after spending most of the...

was not able to force dfu, still have 5v .30amp all ports, ppbus still only 12.30, PP3V3_G3H_RTC_X is 3.3v, all ports still 5v .30 amp, i have 3 units all with same issue, thermal cam shows T2 getting warm, not hot temp about 90 degrees

what steps are you referring to, for entering dfu mode, keyboard combo isn't working, , how to i force enter dfu

ppbus_d3h 12.30v 3V3_G3H_RTC 3.3v P1V1SLPS2R_SW1 1.1v P1V8SLPS2R_SW0 1.8v PP1V8_AWAKE 1.8v PP1V2_AWAKE 1.2v just noticed that top right port u3200 is cycling every 12 sec or so u3200 and u3100 have been replaced

replaced cd3217 chips because of cycling issue, the cycling has stopped and i have solid 5v with 0.40 amps, but no power, ppbus is stabile at 12.30v and device is not in dfu mode, curious what to check next, seem to be missing pp3v3_s5

sorry thought you said to take diode mode reading, with meter on ohms black ground, red as probe L8410 215k-300k reading is inconsistent L7030 285k L7701 73k L8102 43k L7600 250k-500k reading inconsistent L7660 0.560m LA950 2.5ohm ? did you mean 25ohm or 2.5ohm LA860 15.4ohm LA850...

if battery is connected, i get 5v 0amp closest board i have to this is 820-01700 quite a few differences without battery diode reading L8410 .835 L7030 .488 L7701 .106 L8102 .091 L7600 .399 L7660 .367 LA950 .003 LA860 .020 LA850 .060 LA750 .060 L7221 .002 L7211 .002 L7420 .006 L7410 .006...

using oem 96w charger, without battery L8410 0.045 L7030 12.59 voltage bouncing drops to 7.5V L7701 0 L8102 0 L7600 5.13 L7660 3.49 LA950 0 LA860 0 LA850 0 LA750 0 L7221 0 L7211 0 L7420 0 L7410 0 L7231 0 L7330 0

have 2019 16" maxed out specs would really like to get fixed, original issue was no power 5v all ports, if battery is disconnected i get 20v on all ports, soon as battery connected drops back down to 5v 0amp on all ports, thought i had restored power issue, something I'm missing, with battery...

nvm board is shot

PPBUS_G3H stays 12.34v coils around u7800 have 0v, looks like dead short on pp3v3_g3h_socpmu, all caps reading .03ohm, should i replace u7800

yes using oem 96w charger, noticed after a min or so goes to 5v 0 amp on all ports, when i first switch ports says 20v 0amp for a sec then resets back to 5v .2 amp, then drops to 5v 0amp, tried to enter dfu but not responding

not sure where to start, getting 5v .02amp on all ports, after a min or so drops to 5v 0amp, on all ports, ppbus is 12.34v, 3v LDO present all 4 cd32, 1.5v LDO present all 4

just got home from work, laptop is still on, but in safe mode, sleep settings have been changed, so i restarted, unit is still crashing, if i hold shift key it will boot normal, prob still gpu issue, but figured i would add new info that it only loads in safe mode, not sure if that points to a...

system crashing, was able to boot into safe mode and turn off sleep setting, MacBook is on and working but not sellable in this condition, wondering if there is a fix for this, it is a very common issue , panic(cpu 6 caller 0xffffff7fa8b33f00): "virtual bool...

headphones work normal just replaced u6300 no change, is there a way to test u6500,u6520 or surrounding components

update replaced u6460 ppbus voltagehas been restored ppbus voltage, but still no sound, speakers on the right have sound if lid is closed and opened

ppbus_g3h is low 12.37v on c6555 and all the plbis caps near the audio ics Pretty’s sure this is the problem, and it’s obvious something. Is dragging it down Just not sure how to find the fault in this situation Don’t think I can inject voltage to see what’s warm, Any suggestion would be...