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Medium size core and this area gets hot, is it PCH? I bet it is...

Hi, i tested board with removed heatsink previously and now again and one side of cpu gets hot, exact value 1.1Ohm on the PP3V3_S5 rail. Also I have second working board to compare resistance and on L8060 its only 1.2ohm same on L7900. On working board resistance is around 56ohm on this two coils.

Hi, I got for repair MacBook Pro 13" 820- 00875-A after liquid damage. I check all rails and PP3V3_S5 is shorted PPBUS_G3H 13.10V SN650839 have some voltages coming out: PP5V_LDo5V PP3v3_LDO3V PPBUS_PMIC PP1V25_VREF all those are present voltage on C7960 PPBUS_G3H_CPU 13.10V SMC have...

PM_SLP_SUS_L 3V3 3V3_SUS 3v3 PM_RSMRST_L 3v1 PM_PWRBTN_L u8130: 1 3v3 2 3v3 3 0v9 4 3v2 5 0 6 3v1 i replaced u8130 cause there was only 0v7 on pin 6, after replacement its still only 3v1 then actually the board turned on, but only with disconnected audio cable...

very small water damage was on R8156, i replaced the resistor before it was taking 0.1A on 16V now it take 0.02A which is normal but it wont start, i have green light on charger, 3.4V ok, i have 8.58V, 3.3V on L7560 u1950 was bit corroded, so i replaced it, and q8150 also, than u7501 same , i...

I test both files and didn't get any change, laptop still works slow as it was with original bios.

okay thanks for this I will try

2informaticos will you be able to help me out with this bios? Thanks

ok it works with the battery only, i tried the board out of the chassis, after cleaning it works fine, those tricky a1502 laptops, most of them works without the battery, this one needed it

smc not enabling 3.3v at u7501 but if i keep reconnecting the charger than sometimes it does, and the board kinda turns on but only with 0.5A and the fan wont start, in smc bypass it turn on with 0.7A and fan i replaced u7100, same, the 10 ohm resistors are good and the area is not water damaged

I tired this bios but laptop not powering on with it , fan spin for 2 sec and and it is like in loop. Here is working link for my original bios https://drive.google.com/open?id=1MywRTG4969tLWMhOZBB5Y1nlGxXJkaiu

it had small water damage, it was powering on before, it had a broken screen also i cleaned it out now it wont power on only with smc bypass only small corrosion i see is C1910 but the ppvrtc_g3h is 3.3V present, C5021 next to smc i removed those caps, same reflowed SMC, same

I checked what you said, without LIO flex or disconnected camera is same. HWMonitor shows right temps nothing unusual. I search forum trying to find this bios but this with I found doesn't work, link is not active any more. Could you clean my original bios for me please. I use method with...

did u actually replace the usb connectors? i have one liquid damaged board 820-00840, the board seems clean, but the usb connectors are rusted away, it actaully takes 20V 0.02A measured with usb-c meter, there is loads of BGA around , how can i safely replace the connectors?

Thanks for response I checked under microscope no corrosion on one legs or connections or parts. I expected in first place it will be thermal sensor issue that how it looks like but no errors. Do you think if there is no errors SMC still could be faulty? It will be very unusual unless some...

Hi I have now MacBook Air 1466 820-3437-B. Laptop is slow, loading system very long (but after load in system it works fine)and want load installation USB stick. It was slightly liquid damaged around U1900 main board has been cleaned and inspected. I tested laptop with ASD, no sensor or other...

Have now some measurement: SYS_ONEWIRE - 3.4V PPBUS_G3H -12.58V SMC_RESET_L -3.41V Update: I measure also SMC_TPAD_RST_L 3.40V SMC_ONOFF_L 3.40V Looks like the smc_reset signal should be low but is not from some reason

I check schematic regrading to this 1V05_S5 voltage "Alternative is strong voltage dividers (200/100) to 3.3V S5" Where this dividers can be find ? Thanks

Thanks for answers will check all mentioned signals, I have tested board with second DCIN board no changes. Well I tried to find this voltage 1V05_S5 and its not on 1st pad of this U7740 place. Im not sure is not connected to this rail or its not present because I can't find place where it is...

Hi everyone, I have mentioned in title laptop for repair. Laptop starts working after cleaning there was a green light and fan spin and suddenly stoped giving any life. My measure: 5V5_S5 present 3V3_S5 present P3V42_G3H present 3.4V PM_SLP_S4_L - 0V P5VS3_ENTRIP - 0 V PMSYSRST_L -0.00V...