Recent content by jadao

It is solved! I checked R7030/C7030/C7040 and replaced Q7030/Q7040. I removed also ISL9240 to inspect traces underneath and I put back another ISL from a known working donnour.

3.3 ohm over C7020 and C7023 No short on VDDA and VDDP, diode mode values 0.424, 0.423 and 4,7ohm measured on R7075

Then I don't get it... I see in schematic U6903 VIN1 and VIN2 inputs tied to PPVIN_G3H_P3V3G3HRTC_R and PPVIN_G3H_P3V3G3HRTC is derived from PPBUS_G3H at R5420.

3V3_G3H_RTC is missing but I didn't bothered because if I am not mistaken U6903 needs PPBUS_G3H in order to generate 3V3_G3H_RTC. Yes I checked CHGR_RST_IN it is missing because 3V3_G3H_RTC missing also.

This one got liquid damage near U7000. It is stuck at 5V 0A on all ports. PPBUS_G3G is missing and no short with diode mode value of 0.400. Checked all big coils including the ssd one L9080/81 and there is no short. I replaced U7000, checked both R7021/22 and R7061/62 and still nothing dead at...

It is fixed, dfu error was from the AC2 machine lacking space… Thank you for your support. To summarize: -5v 30-40mA because shorted cap C8430 on PP5V_MPMU_BSTLQ_XW rail -Replaced the shorted cap but still 5V 30mA because coil L8430 was open and U8100 was not receiving PP3V3_AON -Replaced...

Yes I solder back each chip as soon as I rule out it is not causing the short, then i go to the other chip. You were right I had a problem with my stencil, it was not flat on the middle and tricked me. I reballed U8100 and solder it back: Now it chimes and I have the...

Yes I had chime consistently, I was able to Power off and power on, when I pressed power button I had again the chime. Caps Lock never reacted and I didn't see any light on my auxiliary usbc adapter dongle. I am editing my message, because I noticed P5V_S2 (missing the enable) not even showing...

Hello 2informaticos, LDOs on U8100 where surprisingly all 0V: So I checked further and noticed MPMU_BSTLQ_LX (input I guess) was 2V. PP5V_MPMU_BSTLQ_XW and PP5V_MPMU_BSTLQ were also 2V. The coil L8430 was open with 2Mohms! I had 3.8 volt (PP3V8_AON) on one side and 2V on its other side...

This one has no liquid and just died suddenly. Inspected the board and found out C8430 dead shorted. Replaced the cap and no more short (0,442 diode mode value). However usbc meter is still showing 5V with 30-40mA. I noticed the rail PP5V_MPMU_BSTLQ_XW is only 2V, schematic says 5V but I don't...

Unfortunately I wasn't able to reproduce the same situation, can't load options to go with internet recovery, machine keeps constantly rebooting even with 3V8_AON.. Thanks for the usb boot trick didn't know that on this recent machine but the machine doesn't pick up external usb drive...neither...

As soon as I get 20V on usbc-meter with providing at the same time external 5V to PP5V_S2 I will get 3V8_AON. usbc meter cycles as follow: 5v->20V-> 0v and repeat 5v->20V-> 0v it stays long enough at 20V to be able to see progress bar going to 25% and then it cycles again. When I shut off...

I ended up puting back the original chip U5700. I checked also all surrounding components near u5700 and evrything is in spec. Liquid was more near speakeramp UR700 and UR730. Something may probably help, I injected 5V at PP5V_S2 rail (it is not shorted) and plugged the usbc charger...

I replaced U5700 501CR17 with U5700 501CR0B coming from A2337 board and i have exactly same results. 5V 35mA with same values on pins 8, 7, 5 and 12 I had doubts for the chip but schematics shows same pinout...

Pin 8 : PPBUS_AON 12.3V Pin 7 : PP5V_AON 4.99V Pin 5 : P3V8AON_PVCC 4.99V Pin 12: P3V8AON_PWR_EN_R 4.46V measured at the zero ohm R5710 on both sides 4.46V