Search results

With no RAM and with battery only, I get quarter fan spin. With no RAM and with charger I get a 1 beep loop. PPVCORE_S0_CPU is 1.149V

Hello everybody, I got a MacBook Pro 17 early 2011, 820-2914 with fans spinning that does not chime. No signs of liquid damage. PPBUS_G3H is 12.53V ALL_SYS_PWRGD is 3.3V Any ideas?

D6910 was next to the MagSafe connector, so hard to replace... But it worked! Thank you Duke!!! Case closed

Thank you Duke, you're right. D6910 is missing. I do not have a doner board for this. Any other boards that have this component?

R6910 pin1 16.43V pin2 16.27V, R6912 pin2 16.43V

D6905 gets no power... Power stops at Q6910. In my board view file Q6910 has 3 pins on the left and 1 on the right side. The actual chip has 4 top and 4 bottom legs...

Pin 1 of C6908 gives 106 KOhm resistance to ground

Hello Duke, PPDCIN_G3H 16.43V PPBUS_G3H 0V PP3V42_G3H 0.015V

Hello, I got a 820-3190 with liquid damage that got under a RAM chip. Also got the beeps that confirm RAM issue. I ultrasoniced the board and now I don't even get a green light. I do have a board view file but no schematic...

Replaced 51125, PPBUS_G3H is stable at 12.52V. However, it does not charge a known good battery.

I took the known good jack from another Retina 15 early 2013 and it is definitely OK. Will removing R6896 kill the digital out functionality? If that's the case, I can live with that. Thank you for the useful answer.

Hello, bought a Macbook Pro 15 Retina mid 2012 with damaged audio jack, internal speakers work fine. When I plug in a known good audio board 821-1548-A (headphone jack), nothing works, no internal speakers, no headphones, and I get the red light inside port. Any suggestions?

ppvcore_s0_cpu and ppvcore_s0_mcp resistance to GND is 24 Ohm

Resistance 17/18 is 3.5 Ohm, and 26/27 is 21 Ohm. TPS51125 looks clean.

Found short in ppvcore_s0_cpu line, diode mode is 0.014v. Also ppvcore_s0_mcp is 0.015v. No corrosion around TPS51125. PM_PWRBTN_L is going from 3.3v to almost 0 when shorting SMC_ONOFF pads.

Diode mode with leads reversed reads 0.515v, resistance to ground is 10.42 kOhm. History is unknown :(. PPBUS is NOT stable

No, it does not charge a known good battery. In diode mode PP3V3_S5 is 0.140v. Is that normal?

Battery is charging. U6990 area is clean, minor corrosion on unconnected R5001 pin 2.

Sorry... Resistance to GND on pp3V42 is 21.10KOhm

Thank you Duke! Shorting pads does nothing. Resistance to GND on pp3V42 is 0.311v