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HOW? I'm now getting 5V at L7520

WAIT what the heck it's working now

How do you know these things :eek: yes I'm using an adapter pahahah changing now and trying it again. I'll check for PM_PWRBTN_L

Hi there! Revisiting this today. Bought donor board and have reablled SMC from a 820-00138-a board but I noticed the board i'm repairing is 820-00138-05 have tested that SMC and while I get the orange / green light and while the light turns screen when i try SMC bypass, it's not doing anything...

I no pulse a good sign or bad sign?

SMC_DCIN_ISENSE is 0.03v SMC_BMON_ISENSE 0.06v No pulse with L7520 when SMC_ONOFF_L is triggered

I'm probably missing something really simple aren't I :confused:

AVREF_SMC is good at 3.3 Nothing at PBUS_S0_VSENSE because there's no SMC_sensor_PWR_EN DCIN_S5_VSENSE is 2.8V SMC_CPU_VSENSE 0V SMC_P1V05S0_VSENSE 0V (I'm guessing all S0 are down for obvious reasons) SMC_CPUDDR_ISENSE 0V SMC_P3V3S5_ISENSE 0V How would it be possible to check sensors...

same results with battery + charger

ok retesting with orignal chargere pin2 = 16.5 pin 3 = 4.4 pin 9 = 0.03 pin 12 = 3.4 pin 13 = 3.3 pin 15 = 0.06 pin 26 = 16.29

Whoops, i was using DCPS. i have a habbit of using this. I'll remeasure it now with the original charger

Charger only: pin 2 = 20v pin 3 = 5.3v pin 9 = 0.03 pin 12 = 3.4 pin 13 = 3.3 pin 15 = 0.06 pin 26 = 19.26v Same result with battery and charger connected Pin 17/18 3.3 ohms pins 27/28 20 ohms (seems high?) 3v42 is 3.4v on battery PPBUS_G3H 7.3v on battery

I should mention, before it died the customer told me that it would only work with power supply plugged in. Would cut out as soon as it's disconnected.

Hi there! Have 820-00165 green/orange light, no fan spin. SMC bypass works. Was pretty corroded in some places. thought i'd try my luck with the ultra sonic but same issue So must be a sensor as I understand it? thanks!

Actually, it wasn't from the same model donor. the chip has the same markings. I guess you're going to tell me now that the programming is different hahaha I can't find SMC_AVREF in the schematic or board view

Ok so I did a nice reball on a new SMC and green light is back BUT it doesn't boot in bypass mode. faulty SMC?

thank you! Going to reball an SMC and put that on next week. that should bring me back to where i started right?

I used a bench power supply. Damn!!!!!

did i really fry the SMC by plugging in the charger at a slight angle ?

SMC heats up.......... oh shit