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This is what I did, it says: Service recommended See on the left side of the photo, it is what is displayed in About this Mac -> System Report -> Power On the right side of the photo you can compare with the display of Coconut battery

It says: Service recommended See photo attached for more details. I also did several SMC reset, no effect on the status

This is a board that had water damage at trackpad level. No light on charger, battery not visible, fan full speed, ASD test showed: - SMC: 0x0 SMC Critical Sensor Check [FAILED] -- SMC is unable to read sensor - THSP Thunderbolt Proximity [FAILED] -- SMC is unable to read sensor -...

Strange enough, this message also appears on the known good chip I tried to erase. Using the same hardware and software (ASProgrammer 1.41) to flash BIOS, I never had similar issues when flashing A1286 or A1278 dumps. Any idea?

I used a known good SPI ROM chip, same issue, 5 seconds spins and stops. I will stop with this one. By any chance, do you have any clue about this message when trying to erase the SPI ROM: "Possible protection is enabled. Press "Unprotect" and check datasheet"?

Ok thanks, discrete GPU? Can I apply the trick of hardware mod on the GMUX?

When fan spins: FSB_CPURST_L=1.07V PLT_RST_L=3.3V I can read the SPI ROM, but when I try to erase before writing I got the message: "Possible protection is enabled. Press "Unprotect" and check datasheet" Is the chip dead, or is there any trick?

Hello, This board in good conditions, no liquid damage visible. Green light on charger, fans run, chime, USB activity on pendrive, but no display backlight and no video, no video also on external display. PPBUS_G3H=12.57V DP_MUX_EN=0V PP3V3_SW_LCD=0V PP3V3_S0=3.36V LCD_PWR_EN=0V PP3V3_S5=3.36V...

Any idea how to continue investigating here?

It's very fast, on digital Vmeter it seems to pass directly from 0V to 0.96V, I don't see higher value in between SMC bypass mode: fan runs high speed 5 seconds, then stops. Same scenario after when pushing power button again.

I expect PPBUS_G3H=18.5V when fan is spinning because on page 8 this value is mentioned. Maybe not correct value? No experience with this board model... When fan spins: VCORE=0.96V CPU_PWRGD=1.07V Is this the expected value? It comes directly from ICH, if this is wrong, ICH is dead? "Still...

Hello, This board in good conditions, no liquid damage visible. Green light on charger, fan starts and runs 5 seconds then stops. No display backlight, no chime, just very short flash on USB pendrive. When fan runs I have: ALL_SYS_PWRGD=3.42V SMC_LRESET_L=3.3V PPBUS_G3H=8.43V...

Ok thanks. All these names were not clear for me, I found an interesting link to understand them: https://en.wikipedia.org/wiki/Northbridge_(computing) But ok, NVIDIA needs power button. Replacing L9004 solved the issue, now blinking folder. I read a comment from Louis in the link below that...

Sometimes I feel so stupid... it turns on with power button, thank you both. Because A1237 turns on alone when connecting the power supply, I thought A1304 would be the same... they are "almost" identical. Anyway, now fan spins, it chimes, LCD backlight on, but no blinking folder, either on...

Hello, I have this board in good conditions, no liquid damage visible. Green light on charger, a battery charges, but no fan. SMC_RESET_L=3.44V PPBUS_G3H=8.4V SMBUS_SMC_BSA_SCL=3.43V SMBUS_SMC_BSA_SDA=3.43V It manages to charge a battery, current 0.8A, with BATT_POS=8.4V SMC_BC_ACOK=3.43V...

Thank you both. I never flashed GMUX, I saw another post about that, so I will first get a Lattice HW-USBN-2A programmer, then I will open another post because for sure I will need you support!

Thanks for the information. I completed the mod today, it was perfect for a rainy Sunday! I passed my microsolderer exam, it works :D Thanks again for the information. Just to clarify about this mod: it was originally for 2011 820-2915 (I see L8920)? Then can I use these pictures to modify a...

Woow... thank you, this sounds interesting to do! I will try. I also noticed that on internal display the image is ok, even with video playing; it starts to distort when I force dedicated GPU. When I look at the block diagram page 2, I understand that mini display port should also use internal...

Hello, I have this board with a graphic issue, see examples attached. When I play a video it's worse, I see just a blinking white display with some colour spots. Do you have by any chance A BIOS which use only the internal graphic? Maybe the internal is still good?

I replaced U7000, exactly same behaviour: PPBUS_G3H=12.3V, and signals on SMBUS_SMC_5_G3_SCL and SMBUS_SMC_5_G3_SDA identical as before. So I guess next step is SMC replacement, but this is not my level... so I have a donor board