Search results

So i got one of these wIth catalina beta corrupt bios :). i need a clean dump for this. but i dont find it. just in case ive tried my luck already at the forum, ghostlyhacks.com and many other sites...can someones share a good now working one?. all the ones i seem to find either the machine...

Already tried good know trackpad and trackpad flex. already tried 3 good RIO boards, before touching board. after that replaced U9750, r9704, r9703 and c9751. now i got HDMI, but machine is slow.

this machine came cuz HDMI, wasnt working. i found the issue was with U9750, there was corrosion on r9704, r9703 and c9751. i replaced them all, and now it works, i get video in a external display. but after that machine became slow, and fans blows at full speed. so i used ASD efi version, and...

I reflowed U3200. now the port for U3100 stopped shutting on/off the amp meter. still when i connect thorough the port of U3200 there are rails that dont come up... another bad U3200?, or is there something else to check??

in U3100, PP20V_USBC_XA_BUS i get 45 in diode mode. In U3200 , at PP20V_USBC_XB_BUS i get a open circuit...

there is no short between R7020 and F7000. i checked all rails in both U3100 and U3200. there is a issue in U3200 i get all rails on U3100. everything pulses. In U3200 i dont get any rail. another bad chip?. or where should i check?.

ill compare all readings now on both ports.

if i connect throught U3100 port, i get 3v at PP3V3_G3H and 5V at PPBUS_G3H. mind you these are only pulses, since the ampmeter keeps on turning on and off... when connected through U3200 port, i get 0v at pp3v3_g3h and 2v at PPBUS_G3H.

shorted U3200. replaced with brand new one. Now i get 5v on both ports. when i connect charger on port corresponding to U3100, i get 5v with 0.3A. but type C ampmeter keeps turning on and off. i get voltage at PP3V3_G3H and PPBUS_G3H when ampmeter is on. when i connect charger on port...

well i got this. it was a shorted u3200. a brand new one was shorted :). I noticed because when i took out F3010,C3404,3201 and D3400, i still had short to ground. i write it jst in case it matters...i replaced U3200 with a brand new one. now i get 5v on both ports. top port, gets 5v and marks...

i did all you told me to before messing with the smc......then i reflowed smc, and board is now dead haha. i guess ill have to get some scraps board go replace it. and a new stencil, the one i have its bent...ill update once i get everything i need to fix this.

resoldered r5100 to make sure it has good contact with pads. removed r7100, smc reset l increased to 3.12v....

TP and KB are disconnected of course!

PPBUS_G3H fluctuating between 12.55v and 12.66v. 3vs42 stable at 3.42v. SMC_RESET_L is at 2.34v. As for U5110 pin 1 - 3.42v pin 2- 0v pin 3-3.42v pin 4- 3.30v pin 5-2.16v pin 6- 3.10v pin 7-3.42v pin 8-3.31v

which rails should i check?. sorry if its a dumb question, its my first time with one of these new models. i checked pp3v3_g3h and i have 3.3v when the ampmeter its working and the bottom slot. else i get 0v on that rail!

i made a post about this before, in that case i solved it by replacing trackpad, io board...but now ive got two of these with the same issue. i replace trackpad and io board, and they are still shutting down ramdomly. i dont have any idea where to check, since its such a weird issue...

so, i got this machine as water damage there is no sign of it, inside the machine. i took out the board and made some measurements. ppbus, is 12.64v, i checked data lines, they are open. i checked smc_reset_l, and its fluctuating. pm_battlow_l is fluctuating too. my suspect is that the SMC is...

well i reflowed them again just in case. now i get 5v volts on bottom port, with 0.3A. top port still dead. and bottom port only works on one side , if i turn it around, it doesnt work....corroded port?. i mean in these is supposed to work whatever way i plug it in.

i checked and compared with original chips. its the same termination, the same one you put CD3215C00. im pretty confident with my soldering but, if you think is bad i can take them off and reball them. by the way i reflowed them...i tested for voltages too, and i dont get anything anywhere...

well this one supposedly shut down whitout anything be done to it. i opened it up, not sign of any kind of damage. u3200 was heating up so i replaced it. i got 5v volts on this port. but the other one was doing nothing. so i replaced u3100 too. then now both ports are death, they dont show...