820-00165 SMC issue


New member
Hello, we have this 00165 that 8.17v, it had corrosion on U3510. After replacing, still 8.18. Rest of the boards looks clean, now we changed the SMC 3 x (no stock left:() but still get 8.17. I do get SMC_PM_G2_EN on U7501? Is there something else that can pull down the SMC power to 8.17v? I did get a spinning fan (blow hard) at some point but after we replaced the 3rd SMC nothing. Missing P3v3_SUS as well as P3V3SUS_EN, i do have P3v3_S5.

Another question, is the SMC for 3437 compatible with 00165?

Some more readings:

I have 32 on clock chip
U1950 gets 3.4v
PM_BATLOW_L = 3.3v

Edit: just changed the 4th SMC from a board with a 100% working one (short in memory power line), same, 8.17v but on previous board 8.6
Last edited:


Staff member
Why do you change things without reason?
Did you check voltage and diode mode on SCL/SDA lines of battery bus?
Did you try the MLB alone, without LIO flex connected?
Post all U5110 voltages.


New member
Status update: Replaced U5110 as pin 7 showed 0.117v, after replacing 3.47v and orange light + PPBUS = 8.59v. Also I get SMC_PM_G2_EN = 3.4 seems SMC is running. Missing now 5V, ofcourse.... no enable signal at R7551:rolleyes:. Will use the search button.... :D