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Compared with good board all big coils have same diode mode reading, the only one a little bit off is PP1V2_S3 (L8100) 0.245 (950ohms) vs 0.175 (600ohms) on faulty board. P1V8G3S_EN is present 1.8V and so sorry PP1V8_G3S is also present 1.8V, I think I just didn't probed the right place...

I have this board with no liquid damage, stopped on its own as customer reports. PPBUS_G3H 12,62V PP3V3_G3H 3.3v PP3V3_G3H_RTC 3.3V PP5V_G3S 5V PP3V3_G3S 3.3V PP1V8_G3S 0V / 0.318 PP1V8_S5 0V / 0.466 PP3V3_S5 0V / 0.320 PP1V1_SLPS2R 1.1V PP1V1_SLPDDR 0V / 0.365 Coils around PMIC PP1V8_SSD...

Hi 2informaticos, 3V3_G3H is steady 3.3V , PPBUS_G3H 12,56V during 14 secondes and 12,32V during 4 secondes, PP5V_G3S 5V during 14 secondes and 3v during 4 secondes Only L7030 CHGR_PHASE1/2 8.6V during 14 secondes and 11,2V during 4 secondes No other voltage (even a pulse) appears in any other...

I have a Liquid damage board around U7230, Power button, U9000 and U9080 areas. Cleaned all corrosion (minor) and replaced R4922. 20V on usbc meter with 100-95mA on all ports. With battery current draw is only 500-700mA however battery seems a little bit inflated... P1V1SLPS2R_FB 1.1V...

Thanks for the tip, it works very well with smc bypass and a wire soldered on SMC_ONOFF_L. All voltages on pages 11 and 58 try to appear, I noted the values below. I tried heating PCH with flux but didn't change anything... Page 11 PP3V3_S5=3.3V PP3V3_SUS=3.3V PP3V3_S0= Pulses to 3.3V and goes...

This one has no liquid, is clean and just died one day on its own. Customer powered it off and it never powered on again. I 've checked all these signals for PM_SL_S4_L and they are present. PPVRTC_G3H RTC_RESET_L PCH_SRTCRST_L PCH_INTVRMEN PCH_DSWVRMEN PCH_CLK32K_RTCX1 PP3V3_S5 PM_DSW_PWRGD...

Reverse diode mode reading on 3V3_G3H is normal 1.240 and comparable with other working boards. Yes diode mode 0.041 on SMBUS_SMC_5_G3H_SCL was solved it was D6950 shorting partially to ground. I decided to inject 5V on U6990 Vin and enable. It produced 3,4V when 5V was applied after D6905...

Liquid damage on this one, I found it difficult and time consuming. 1) It had a full short on C6990 PPVIN_G3H_P3V3G3H, replaced the cap and short gone. 2)Next, it had PP3V3_G3H low voltage around 2.2V. Diode mode was showing 0.340 very similar to other working boards however resistance to...

Hi there, this was a liquid damage with PPBUS shorted at u7430 (Pin 5 CPUGT_BOOT2_RC was burned shorted with ground along with pin 6 PPBUS_HS_CPU). There was also minor corrosion at other spots like PMIC an TPS51980. Replaced U7430 and short gone. Cleaned also corrosion everywhere. The board is...

Sorry I was unclear in my previous post. I meant it is solved :cool: 20V is back battery is charging now and all ports working now.

So I started by removing U3100 because on this chip I2C_UPC_SDA corresponding ball is sitting next to 2 GND balls and indeed that was the bad soldered chip. Reballed again cd3215 and it is good to go now. I learned at least that a shorted I2C_UPC_SDA line will cause these behaviour: 5V...

Hi 2informaticos! I inspected U2890 and there was absolutely no corrosion, checked all the spi/rom resistor and traces one by one from U2890 and the one for CD3215C00. And yes I do get 1V1 LDO on each CD3215 when the corresponding port is plugged in. I decided to check the scl/sda bus between...

No liquid at all on the audio board/flex and I also tried with another audio brd/flex just to discard any issue but no difference. While I was going to measure the diode mode as you asked me to do I charged the battery with another test board and surprisingly the patient board is now booting...

Got this logicboard with liquid damage, initially both CD3215 were shot, first one with one LDO shorted and second one with PP1.8V_SLPS2R shorted and an LDO shorted. First port was 5V 0A, second port was 5V going 0.2 to 0.43A. Replaced both CD3215 and I have no more short. Board is now stuck...

I know this thread is exactly 2 years ago, I came across the same exact symptom. It turned out being a broken trace on AUD_IPHS_SWITCH_EN between a test pad and U2152. The test pad is next to R6880-1 / U6880-3 (under the annoying foam). U2152 doesn't show up on boardview but it's the same on...

This board was liquid damage, no power, with the lcd flex burned, connector on the board is intact. I Fixed the liquid and managed to get the board to boot, however there is backlight but no image. I tested different screens known to be working. I also ruled out lcd flex cable, ssd, pram and...

I received this logicboard with water damage. Initially it was stuck at 5V, ISL6294 had to be replaced and I restored the sensing resistors and traces witch bring back 20V and it is now able to charge a battery. Without the battery it stabilizes to 0.40A and cycle again . The fan spins very...

Oh no problem at all. I was able to simulate the same issue with a known working board by preventing PP0V9_TBT_X_SVR and PP3V3_TBT_X_S0 to feed U2800, I had the exact issue. Suprisingly nothing is reported in diagnostic mode. So I just reballed an another U2800 from a donnor board and...

I soldered a wire from J4801-pin 13 and I am measuring 3.3V on TPAD_SPI_CS_CONN_L with trackpad connected while logged in macOS. Just in case I tested with another set of trackpad and flex cable and I have the same results.