Search results

hi all, I have this board but no power: no led green or orange no power bypass mode no fan spin I could find some corrosion on the U5110, I removed the IC and saw that pin 1 did not exist, I replaced the IC and put a cable to have the line pp3v42 - 3.39v ppbus - 8.10v pp3v3_s0 - 0,08v...

ah ok now I understand, sorry and thanks for all yes ! pretty first the coin cell, fuck bad PCH chipset thanks again

Excuse my lack of knowledge, do u mean that I check these lines (image I attached) in search of a shorted capacitor or any damaged component?

I check. C1300 and I have short, but remove this and pin2 PCH_SRTCRST_L I have short to ground and R1300 with short to ground in line PP3V3_G3 and check C1930 and Q1930 but is good uffff :(

yes, its new and good brand "Duracell" Voltage 2,83v, ok check PCH thanks

D1900 1 PP3V42_G3H= 0v 3 PP3V3_G3_RTC_SW= 0,75v 4 PPVBATT_G3_RTC_R= 1,05v

I thought it would be better to replace it...... PP3V3_G3_RTC_SW= 790 value D6901 ? I can't see it, I have APPLE IMAC A1418 LATE 2015 J117 MLB 820-00034 / 820-00430-a 051-00081 SCHEMATIC

I have been able to observe D1900 diode very hot, but it has been replaced with a new one and when I inject 3v it heats up again, is this normal?

Yes, sorry, you are right, I checked the references and they are both LT3470AED, new values (very similar to last time): U6900 1 P3V42G3H_FB= 0,75v 2 PP3V42_G3H_REG_R= 2,10v 3 P3V42G3H_BOOST=4,68v 4 P3V42G3H_SW=1,92v 5 GND 6 PP12V_G3H= 12,01v 7 UNCONNECTED 8 P3V42G3H_SHDN_L=3,57v 9 GND

sorry but this boards has a LDPR 675H and I have MacBook Air A1466 with LDPR 508I, can i use this?

ok i'm going to try to change it thanks !! 2 PP3V42_G3H_REG_R= 2,10v mode diode to ground value 892

hi thanks values: U6900 1 P3V42G3H_FB= 0,75v 2 PP3V42_G3H_REG_R= 2,10v 3 P3V42G3H_BOOST=4,68v 4 P3V42G3H_SW=1,98v 5 GND 6 PP12V_G3H= 12v 7 UNCONNECTED 8 P3V42G3H_SHDN_L=3,58v 9 GND

U6970 1 PP12V_G3H= 12v 2 SMC_PM_G2_EN=0v 3 UNCONNECTED 4 GND 5 PP12V_G3H= 12v 6 PP12V_S5= 0v 7 FET_EN_P12V_S5= 0v 8 PM_EN_REG_P3V3_S5=0v 9 GND 12v_S5 mode to ground value 1866

Q6970 1 PP12V_S5=0v 2 PP12V_S5=0v 3 PP12V_S5=0v 4 FET_EN_P12V_S5=0v 5 PP12V_G3H=12v sorry I edit title the model is 820-00430-a

oh sorry i'm talking about the pins of the power button connector on the power supply Edit: when plug power cord I can't see any led green

hi friends, I have received this equipment and I have been able to observe that it had some corrosion in the area of the image that I attached, I have cleaned it well, I have not observed anything strange but only 2v reaches the power pad pins, I need your help. thanks a lot

sorry I don't remember. its true! GL then... thanks for ur help !!!

omg! Sorry but I have no experience with these breakdowns. So it is impossible to repair? Or can I find a person in my city who is capable of replacing the IGPU?

sorry but r u sure? with external monitor works perfectly

sorry for the delay been sick I don't know but I almost certainly must have a short in mosfet of the CPU.