Recent content by ComputerOverhauls

q7010 pin 2 -0.02 mV pin 4 18.86v pin 5 19.1v pin 6 19.1v U7100 pin 2 0.02mV

Ok. what measurements would you need?

Have a macbook air 820-00165 with intermittent power issues. pin 2 of q7010 getting power. tried replacing q7010 and same result. Is there any negative effects of making a solder blob of pin 2 and 4?

No signs of liquid damage. usb ports have power but wont detect a usb mouse,keyboard or drive. power button works but the rest of the keyboard and trackpad dont work. pp3v42 is present on pin 19. the computer buts to internal drive but no user input devices work so further testing isnt...

sorry for late reply. yes fromc7425 to r7425 there is no connection voltage is 0v on both sides of r8111

L7430 pin1 0.7K ohms L7430 pin2 0.7K ohms U7400 pin6 0v U7400 pin12 5v ?????U7400 pin16 0v U7400 pin17 22.8mV from c7425 to r7425 is OL.

fan spins for a second then shuts off corrosion around u7400 area mostly between u7400 and c7400 tried replacing u7400 with a known good. no change. all_sys_pwrgd is 0v r8168 is 99oms noticed that if r8168 is removed then all_sys_pwrgd is 3.3v and fan stays on still no chime or image on...

I dont have a power supply for injecting voltage. Would there be anything else i can do to determine if its an issue with the rom chip itself before buying more equipment? Would be be possible to tap into another 3.3v line on the board? or is that to risky.

liquid damage along the back edge of the motherboard. computer powers on but wont boot to the os. progress bar reaches 100% and it will just hang. some components broke of when i tried to clean the corrosion. r1690,1638 and c3285. cleaning ME reign medusa gave me an error. also got errors...

took a second look at U1950 and there was some very slight corrosion on pin 1 and 8. removed it and cleaned the rust on the pad/chip then resoldered the chip. now it powers on consistently. still need to do further testing. thanks for your help! before when i was posting the cpu voltage i was...

Sorry I'm not familiar with flashing a new bios for macbooks. you mentioned medusa 2 in a few other posts for bios related issues. I'm assuming that this is the correct tool for it? would i need any other tools for this process?

computers history is unknown but. no signs of liquid damage anywhere. cpu vcore is unstable will alternate between 1.7 and 3.8. sometimes it will dip to like 0.1 mV or 0v. most of the time the computer wont start and the cpu vcore voltage will just alternate. sometimes i get no fan spin...