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Good morning, i have a mac that is not turning on. I also noticed that the charger LED is flickering on the brightness (I tested more than 1 charger). I performed the following measurements: PPBUS_G3H: 12.55V PP3V42_G3H: 3.48V PPBUS_S5_HS_COMPUTING_ISNS: 12.55V PPBUS_S5_HS_OTHER_ISNS: 12.55V...

I tested another BIOS file with a clean ME region, but no result.

No display connected EDP_PANEL_PWR 652mV pulse. mode diode 0,631V

'' If not present, check if EDP_PANEL_PWR pulses at the mentioned time. '' 0V, no pulse when mac has the chime. DP_INT_HPD_CONN 0v, no pulse.

PP3V3_S0SW_LCD_UF 0v, no pulse. L8304 okay.

This mac has suffered oxidation on the SMC and U5110. Chime, activity on USB, but no image, only on external video. I used a good display. EDP_PANEL_PWR 0V.

It does not accept SMC bypass mode.

This mac has been repaired by another technician in the U9300 region. The mac displays backlight on and then quickly powers off. Shows USB activity for a few seconds. I replaced UB300, as it had oxidized components around it. Voltage: PP3V3_G3H 3,4V PP5V_S0 starts with 5V and drops to...

USB 2.0 works. I put another one in, but USB 3.0 doesn't work.

Can you tell me which other board I can remove this component from?

Yes, the external USB led stays on.

Good afternoon, this mac was not working HDMI, I performed U2800 and it worked again. Now the customer returns with the defect of not reading data from SSD/HD 2.0/3.0. I performed the replacement of the two cd3215 but did not solve it.

Suddenly the mac turned on using another charger. I left it in tests and out of nowhere it turned off and won't turn on anymore. It is intermittent, out of nowhere it turns on. I would like to know if the components I already replaced are U4200, U3906, U4401, U5850 and U3100 ? PPBUS 12,6V

It worked, thanks.

R7020 1- 0V, pulsing 1,947V 2- 0V, no pulse 3- 0V, no pulse. 4- 0V, no pulse

R5210, R3035, and R3035 are not on the board. Does it come on the board or is it missing?

R6920 0,9 Ohm D6902 Voltage Diode 1 0V, 0,575V 2 0V 0,430 V 3 0V 0,572V

stays high 3.3V

mode diode PPVIN_G3H_P3V3G3H 0V,no pulse. 0,557V PP3V3_G3H 0V, no pulse 0,370V FB200 20,11V I had changed u3100 earlier, I forgot to comment.

Good afternoon this mac has suffered oxidation in the U4200, U3500, and U3100 regions. I replaced the oxidized components, it worked for a while. The customer returned with the defect of an unexpected shutdown. Now no PPBUS. I had made a post earlier...