Recent content by kjchatman1

plt_reset_l is 3.3v except it disappears right with the vcore

you're right. it was the charger. now it powers up and the vcore disasspears after a few seconds then it comes back and stays. but still no usb activity. when using the battery the vcore disappears every 8 seconds

i have a 2020 intel mac air board that had liquid damage and after a thorough cleaning the only issue i found was that pp1v1_s3 has a 5 ohm resistance to ground and the charger was stuck at 5v. i used a dump that found on the internet to program u3060 but now the charger stays at 20v even in...

in smc bypass the fan spins continuously but it still doesn't post

It has no visible liquid damage. When using a 60 watt charger, the ppbus is 12.6v but it does not boot with the charger alone. When booting off the battery, it will power cycle. The cpu vcore it disappear every 8 seconds but when i plug the charger in then the cycling will stop. Is this an smc...

today i found a used screen and it works perfectly with this board. do you think that these new screens are bad?

had an a2251 830-01949 with a cracked screen and replaced it with a new screen purchased from amazon. the new screen is being sold as compatible with multiple models. It never showed an image but i did the mouse test and the optical mouse registered and sometimes the caplock key worked but no...

could you help me out with this board? it had a burned phase mosfet on the cpu circuit and when it powers up the fan never spins and the cpu never gets warm. dabkxdmb8e0 is the board model

i got a spare board today and it did the trick. I hope someone will document how to program a new chip

so the only option to replace ug400 is to take it from the exact location on a donor board of the same model?

it won't enter dfu because of ug400 right?

i wonder if using a brand new chip would make a difference

i thought that any cd3217b12 would work. no? these are not programmed right?

i got it from a 2020 13" a2251

there's no activity on any of them. ug400 was visibly burned when i first started the repair and the first thing replaced