Recent content by it-solve

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...

PU1900 1-2 - 2.37Ohm 14-15 - 4.65Ohm It cycles on each of these every sec, so I added both measures before and during the cycle Charger Only - B+ 13.56V/0A - 13.6V/1.4A Battery Only - B+ 9.5V - 8.3V Charger & Battery - B+ 13.34V/1.5A - 11.5/4.8A