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Hi, the board doesn't turn on. I post these voltages. PP3V42_G3H=3.4V PP3V3_S5 = 3.3V in u7940 RSMRST_PWRGD = UNSTABLE S5_PGOOD_CT= 0.3V PP3V3_S5 =3.4V PP3V42_G3H=3.4V

I had the resistor as it was originally and I have 3.48V on pin 1 of R5000 and 3.48V pin 3 of u5010. I changed it to 33k and this happens: With U5010 already on R5000 (pin1): 3.48V R5000 (pin2): 2.70V U5010 (pin5): 2.7V U5010(pin3): 3.48V when i remove U5010 these are the values. R5000...

update... I changed SMC and now I have the following values: 3V42_G3H = 3.48V PPBUS_G3H = 12.57V SMC_RESET_L =2.6V 3V3_S5 = 0V but when i remove U5010 now if it goes up to 3V (SMC_RESET_L =3V). for this reason also change U5010. but still the same (2.6V)

I removed R7000 and U5010 and checked if it goes up to 3.3V but it doesn't go up. It's the same. I'll proceed with the SMC I guess. I'm still without 3V3_S5. 3V3_S5 = 0.06V

I removed U5010 and it's still low (2.09) Then swap R5000 for a 33k resistor. now pin 5 (SMC_RESET_L) = 2.8V. but everything is the same

I post the new values 3V42_G3H = 3.48V U5010 voltages: 1- 3.48V 2 - 0V 3 - 3.48V 4 - 2.85V 5 - 2.09V 6 - 2.47V 7 - 3.47V 8 - 3.30V

you're right 3V42_G3H = 3.48V U5010 voltages: 1- 3.48V 2 - 0V 3 - 0V 4 - 0V 5 - 0.15V 6 - 0.05V 7 - 0V 8 - 0.08V

sorry, I was wrong. PPBUS_G3H = 12.29V I changed u6990 and u7941 and everything is the same

"First, PPBUS_G3H is incorrect?" It's a bit low right? I'm testing just the board with nothing connected. 3V42_G3H (F7040) = 12.29V stable SMC_RESET_L = 2.16V When I measure SMC_RESET_L something weird happens. The multimeter goes up from 2.16V to 2.5V slowly

hello. I have a 3115-b motherboard. Apparently no corrosion damage. Green light on charger after about 10 seconds, pulling 0.04A. missing PP3V3_S5 (0V) without short circuit to ground Voltages for U7200: 16 - 12.29V 13 - 2.12V 3 - 0V 8 - 0V 17 - 0.4V 6 - 0V VOLTAGES for U7941: 4 -...

Sorry about that. Did not notice it. Fixed. The board is 820-4924a

Macbook keyboard and trackpad not working in OSx A client brought me a Macbook A1502 with a non-working keyboard and trackpad, but when I decided to test them in another OSs (Linux MX and HBCD in my case) and they work perfectly. I tested them in High Sierra and Big Sur in safe mode but they...

I have a motherboard (820-00431-002) that has a missing resistor. I would like to know the value of that resistance. I can't find that information anywhere. The resistor is connected to the ISL6372 pin 6 chip. I'm going to post the photo of the board with the missing resistor. Can someone help...

Hello. i have the same problem the ssd is not recognized. there is no damage or traces of liquid. I already tried with a good ssd and they are the same values. these are the values of u3740. pin 1: 3.42V pin 2: 1.42V pin 3: 2.25V pin 4: 3.42V pin 6: 2.16V pin 7: 0.01V pin 8: 0V already check...

I already checked and R7130 is fine and C7130 measures the same as the same capacitor from another good board

I had the same problem that OP. I changed u7100 and nothing changed. Afterwrds I replaced Q7100 and it turned on, but, there is something that always keeps on harming the Q7100 . it turns on, but when I connect the screen or the speaker the Q7100 breaks again. When it was on , it booted (...

hi. I have this macbook retina 2012. the problem is that it restarts when the apple logo is loading. I disconnected everything on the mainboard and it still reboots. Before this, the macbook would shut down because it had the tunderbold port shorted (bent the pins). the Hard drive does not...

will duty cycle do? or in what value do I need to do it? %, frequency (Hz) or time (seconds)?

yes, PM_PWRBTN_L drops to 0.34V when I activate SMC_ONOFF_L with the button

PM_PWRBTN_L is now stable at 3.44V PM_RSMRST_L and SMC_ONOFF_L are constantly high. PM_RSMRST_L = 2.66V SMC_ONOFF_L = 3.44V