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PM_BATLOW_L 3,34V PP3V3_S5 3,34V I am using 85W charger.

Good morning, this mac had 1V on the PPBUS, I checked the u7100 terminals 27/28 had high resistance, then I changed the resistors and the u7100, the PPbus is now 12.56V, but the mac won't turn on. Voltage: PPBUS 12,56V PP3V42_G3h 3,39V PLT_RST_L 0,021V PM_SYSRST_L 0V; PM_PCH_PWROK 0V, pulse...

Only F3001 and F3000 oscillate.

yes.

SMC_PM_G2_EN is oscillating.

I am using the bench power supply, supplying 12V to the board, does this change anything?

BUF_SMC_RESET_L mesmo que SMC_RESET_L PP3V3_G3H 3.4 oscillating 2.9V

PP3V3_PMICLDO 0V no pulse. PP5V_PMICLDO 0V no pulse. PP5V_PMICLDO_R 0V no pulse.

3.38V oscillates to 2V

U7000 diode mode Voltage PPVIN_G3H_P3V3G3H 567 4,78v~ TBA_AUX_DET 641 1,27v~ TBA_VDDA 468 5,040~ TBA_VDDP 466 5,038~ TBA_MPM_DET 637 3,41V HPWR_EN_L 641 3,38v CHGR_AMON 639 6mV, sem pulso CHGR_BMON 639 73mV, sem pulso SMC_RST_L 636 U7800 PP3V3_PMICLDO...

What is causing this lack of voltage on the PPBUS?

L9400 0.6 Ohm this value is the resistance of the component. The value of P2V7NAND_R is 0.395V diode-scale. I want to know if there is voltage at PPBUS_g3h when the u9300 is off the board ?

P2V7NAND_SW 0,391V PPVIN_2V7NAND_LB 0,448V L9400 0,6 Ohm FB200,F3001,FB201 and F3000 5v, sorry, now the voltages are showing up. The machine is without the u9300, does this influence the PPbus?

This mac suffered oxidation in the U9300, UB300 and Q9401 region, where the u9300 was shorted, I took it out and tested it, but it doesn't show PPBUS. Voltage: PPbus 0V; PP20V_USBC_XB_VBUS_F 0V; PPDCIN_G3H 5.116V shows oscillation; PP3V3_G3H 3.4V; LDO rails showed ideal values in diode mode...

this mac suffered oxidation in the u4200, Q420,U3906 and U3500 region, I replaced the oxidized components, in tests when it enters sleep mode and exits, it shows kernel error.

Hi, this imac has been repaired the USB ports, when it turns on after a few seconds it starts to speed up the fan. In HWmonitor shows that the fan of the ODD this accelerated and 128 Degrees GPU heatsink. How can I identify which sensor is causing this?

Yes, the Power Supply works fine, I tested it on another iMac.

Yes, I tested more than one display that works the camera. There was oxidation on the L4007,L4009.

We replaced the tunderbolt cable, but it did not display a picture. The cable gets hot when connected, even with the new cable. Without electrical schematics, I don't know where to start.