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Just feedback. I had a similar error which was preventing restore or revive. Turn out to be a faulty camera module

Data Recovery Case I have overheating mark on L7210 which seems to slightly desoldered itself under the heat. PPVCORE_S0_CPU_PH2 -2.88 Ohm PPBUS_G3H - 3.18 Ohm Lifted up 7210/30 and short is gone on PPBUS_G3H. 20V 0.02A on charger Still 2.88 Ohm on PPVCORE_S0_CPU Did a blown U7210 fried...

Lots of liquid damage around U9000 and U9080. Reballed U9000 as it was badly corroded underneath. Getting 3Ohm resistance on PP2V5_NAND_SSD1. 410Ohm on a same board for comparison. Lift up L9080/1 to check if caused by U9080 but there is no short on it. PP2V5_NAND_SSD1 - 2.5V - 3Ohm...

Found some dirt and light oxidation around NANDs. Cleaned and now imaging in Target Disk mode. Unreliable Macs.

There is USB activity I can detect it in target disk ode but comes with this message DFU mode recognises it but fails to Revive it. Customer is after the data

I disconnected the internal LCD and tested on the external, but still no picture. NVRAM reset, still no. Tried with a spare LCD. Same Very dusty inside. No visible liquid

I just got A1707 with the same type of short circuit on the PPBUS_G3H line, and 1V injection detected a shorted cap on the audio line. I agree with what you said, but can we clarify what internal ohm shortage or case scenarios we should look for before any injection? Even on low voltages...

Short on ppbus_g3h line Removed the fuses and injected 1V, CPU glares up. Customer needs data desperatly. Dead CPU?

PM_BATLOW_L - 3.08V PCH_INTRUDER_L - 2.81V PM_RSMRST_L - 3.32V PCH_SRTCRST_L - 3.07V PM_DSW_PWRGD - 3.41V

PP3V3_S5 - 3.3V PP1V_S5G - 1V PP1V8_S5G - 1.8V PP3V3_S4 - 0V PP3V1_RTC - 3.08V RTC_RESET_L - 3.07V Thanks for your help

No PM_SLP_S4_L pulse when SMC_ONOFF_L is triggered

Reflowed the area on both sides to see if any change, but the same. I get a drop pulse on PM_PWRBTN_L when SMC_ONOFF_L 3.3V is triggered.

Would we get 20V and these readings if the 3215's are malfunctioning? PPBUS_G3H - 13.05V PP5V_S5 - 5.1V PP3v3_S5 - 3.3V PP5V_S4 - 0V

Oh no, the customer didn't have a chance to pick it up. was staying on the shelf charged.

So far I have reflowed the GPU just in case if it is a cold joint. Same behaviour, loads Windows every time but shuts when test engages the GPU. Stable when test is run on the Intel GPU. UCd the board as GPU Core MOSFETs were soaked in a thermal paste. I went ahead and reflowed and...

Reflowed, it seems to be the same. 20V 0.20A Initially, after a couple of seconds drops and stays at 20V 0.02A board only. 20V 0.5A with battery. Tried a different case 20V 1.2A seems to be charging. But not turning on SMC reset didn't work

Working on this Razor Blade RZ09-01953, which seems to work fine on light tasks or when the GPU stress test is running under Intel, but the minute it runs under Nvidia, it cuts power. Could it be GPU failure? I ran some GUI mem tests and came up fine. MATS GPU RAM test doesn't seem to boot Has...

Replaced the charging chip with the B version. It worked fine and passed all tests. Left on the shelf, and the customer came to pick it up. Not turning on 😲 Back to the repair bench. I am getting 20V 0.02A. No short circuit on coils, and no heat signature. PPBUS_G3H - 13.05V PP5V_S5 - 5.1V...

Previous liquid history, but I cant see any signs. Dead short on PP3V3_S5. When injected, 1.1V/3.5A, CPU heats up to 30*C. With Charger it gets to 20V 0.02A and U7800 glows up to 30*C

+SDC_IN - 18.8V while off 18.4V while on without battery PQ1900-04 Fluctuates 14.7 - 15.1 without battery and not turning on while I am measuring it If I measure after it turns on 18.6V Couple 2R2 looks bit corroded, but they all measure fine including their traces Seems something is...