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Hi 2informaticos.. holding down the power for smc bypass doesn't seem to do anything different

Hi, I have a 00875 thats had liquid damage over the U7650 side of the board. After going through the UC, the laptop started from the battery and got into the OS but I walked away and came back to it turned off. Not sure if the battery is drained or something else. I don't have a spare battery...

Ultrasonic clean and an SMC reflow did the trick. Tested for a couple of days without the problem returning. Thank you for the help

Sorry, thought I was just looking for damaged traces, liquid etc.. U6901 Pin 1/2 SMC_BC_ACOK = 0v, Pin 3 GND = 0.0v, Pin 4 SMC_BC_ACOK = 0.0v, Pin 5 PP3V42_G3H = 3.452v I'll check voltages on U6900 now too

2informaticos Changing the DCIN didn't make any differences. Checked around U6900/01 under the microscope and it all looks perfect unfortunately. Just to be clear. When PPBUS_G3H is below 11.84v (usually around 11-11.4v when just on battery) the magsafe light doesn't come on and the battery...

JohnB8812 Exact voltage on PPBUS_G3H with the battery removed, just 85w charger and the MacBook turned both off and on is 12.48v-12.49v On ISL6259 (U7000) resistance between 17/18 is 2.8 - between 27/28 is 20 ohms which both seem fine I think. 2informaticos I'm checking U6900/U6901 now for...

I have an 820-3115-B with a intermittent fault. It always turns on with a charged battery but doesn't always charge the battery. When it doesn't charge, theres no green or orange light. When it does charge, it shows orange light as normal. I've noticed that if its in a charging kind of mood...

Yeah. No life but a board LED in both cases

Do I need the battery connected for SMC bypass or does it not matter on these?

Nothing from this board when I try to bypass SMC

SMC bypass on these... is that with the board back in and battery connected or without the battery? Hold power button for 10 seconds and keep holding for another 10 seconds while plugging in the power lead right?

Could be. I was told that the boyfriend hit the screen. I still don't understand what it is telling me by pulsing

PM_DSW_PWRGD is constant CPU_VCCST_PWRGD is pulsing ALL_SYS_PWRGD is pulsing SMC_PM_G2_EN is constant 3.3v So maybe U7800 issue?

PM_SLP_S5_L is pulsing also

There's nothing on there under a microscope. The trackpad looks like it may have seen a touch of liquid at one edge but nothing major

U8220 - PP3v3_sus out is 3.3v constant U8230 - PP5v_S0 is pulsing U8200 - PP3v3_S4 is pulsing U8210 - PP3v3_s0 is pulsing U8250 - PP1v8_s3 is pulsing U8240 - PP1v2_s0sw is pulsing U8270 - PP1v_s3 / sus is 1v constant U8206 - PP1v_s0sw 1v constant Are these what you mean?

On U8230 I had a constant 5v out for PP5v_S0 for a minute until I moved the board to recheck the first place that I checked PP5v_S0. I'm now back to pulsing though :(

Theres no pulse on VCORE

So I get pulsing on all of these: PP5v_S0, PP3v3_S0, PP1V5_S0 Anything I've missed?

My bad.. was on the wrong component.. PP5v_S0 is pulsing.. checking the rest