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2.8 OHM

this guy: P3V8AON_SW2 beeps

what should i check?

no other good board here. there is a problem with PP3V8_AON. multimeter beeps. theres a short but cant detect it? the area around q5800/20/40...?

fuses removed. on C5250 12.27V / amp meter shows 5V 0.01A

changed. PPBUS_AON = 6.87 / 6.88 V PP3V8_AON = 2.23V

any ideas?

no other multimeter here. multimeter should be good...

these readings from usb-c connected charger. (140w) 7V without battery connected. just charger. diode mode readings -> without nothing connected. just the board.

Hey guys, got a m1 14" here. coffee damage. amp meter shows 5V 1A my readings: PPBUS_AON: 7V (.450 diode mode reading) PP3V8_AON: 2,27V (diode mode peeps, 2,7 ohm reading, cant really find a short there?) PP5V_S2_MAIN: 0V (.384 diode mode reading) backlight area looks bad. can you help...

okay, i think its like bad soldering. put another new one on it. on the good side its booting up now, got an apple and login screen. on the bad side same behaviour... i thought every cd3217 should be good to boot up?

okay, whats going on here... put another chip on it. on this chip the amp meter shuts off and on in a loop. on the same side the cd3217 gives me 5v 0.26a on the other side i get on both chips 20.4v - jumping to 0.3a and then to 0.02a...whats happening here?

everything looks okay. just read about the board on repair.wiki. i put a new cd3217 on it - i really need to pull the cd3217 from a donor board?

ppbus_g3h is 12.3v on working ports -> t2 crap?

Hey guys, history: 3 ports were showing 5V/0.45A 1 port was dead / burn mark on chip / nothing on amp-meter changed the chip. now the 3 working ports showing 5V/0.25 -> dead port showing now 5V/0A ppbus_g3h / 3v3 are there, when i connect to the working ports. strange voltages when i connect...

Hey guys, thats my first iMac Logic-Board repair. No LEDs are shown. Changed PSU, no LEDs. Where to start?

Hey guys, the lid angle sensor is corroded. Disconnected the sensor - everything´s starting up and fine. Is there a fix without Apple? Can i move the chip (when its alive) to a new cable and everything´s works fine? Or it needs to be calibrated by Apple´s Software? This awesome rocket-science...

dfu restore made it. i love the t2, touch id and all this amazing stuff

no DFU restore tried. just try to install ventura/monterey. internet recovery catalina gone trough. "a software update is requiered" - in a loop.

Hey guys, got a strange mac here. Every time i try to install a fresh OSX, it keeps me saying one update is needed. TOUCH-ID not working. Just the board. Every possiblity tried. DFU reset or what should i try?