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maybe i screwed up the hexedit for changing the serial? i used this efi from duke. that has clean me no? https://boards.rossmanngroup.com/threads/820-3437-not-loading-installing-osx.37967/ can you make me a file to be sure. my serial is: C17L5868F5V7 edit: pram reset already done.

replaced bios and smc and found a broken trace on an SPI Bus Series Termination resistor. now computer turns on but takes over 30 seconds to chime. it also will not boot to my 10.14/15 flash drive. progress bar gets about to 80% and stops. on a working ssd with a fresh os on it stops at...

i dont care about the symptoms, just need it to turn on so i can flash. you do know you can flash/program the smc now right?

i don't have any more 3437 - which is why i was asking. if you don't know i guess ill throw it on a working 00165 and ill just flash it

Is difficult to diagnose a board coming from other service. - i know :) There can be broken traces, or knocked off components. - see pic of broken testpoint (its half off). also only knocked off component is c4062 You should change SMC - will do but question. will this boot initially off of...

This was liquid damaged and been to another shop. as its been cleaned its hard to tell whats been damaged but looks like area around smc, bios and u7090. I'm not sure if smc has been replaced or not as glue around it is gone. board gets a fan movement and pulse on cpu vcore 1.7v. smc bypass...

pulled a u6100 from a working board. still no fanspin, no power on any coils and smc bypass only single fanspin then off

removed u8130. no fan spin. large coils still no voltage. what do you want me to check?

i get a very small pulse at L7630 with the trigger, but if i unplug and replug power i get power on the coil for about 1 second. i get pulse on PLT_RESET_L i rechecked PPVCC_S0_CPU with plugging in and out and i do get power as well for one second. i rechecked pp1v05_s0 as well with...

L7430 i don't have any voltage but i do get pulse with smc onoff triggered L7460 - Not on schematic L7560? - 3.3v u1950 i don't have any voltage but i do get pulse with smc onoff triggered on both 7 and 3

i get pulse on pp5v_s0 pp3v3_s0 - i have 2.1v. I thought s0 only has power when unit is turned on, why am i getting stable 2.1v? when i trigger i get 3.3v pp1v5_s0 pp1v05_s0 - not getting pulse (diode mode on good board is .275, not working board is .215) maybe this is the issue line...

with smc bypass i get fan spin for one second. if i hit power button i get fanspin again for one second.

i get a pulse at PM_SLP_S3_L there are no shorts on large coils i tested pp1v5_s0 and that pulses as well. I will test the rest of s0 and s3 volatages as well as the fets

PM_SLP_S4_L - its at 0v, but i get a pulse when smc onoff gets triggered

PM_PWRBTN_L drops when i trigger smc onoff

i have 3v3_sus now - 3.3v i have no voltage on any large coils exepct l7560 and l7130

i noticed that u7501 was damaged (had a small hole in it) so i replaced it. new voltages: 3v3_s5 - 3.3v PM_DSW_PWRGD - 3.4v PM_BATLOW_L - 3.3v PM_SLP_SUS_L - 3.3v u7501 23 - 8.58 12- 3.4 13 - 2 22- 3.3 29- 5 21- 3.4 still not getting fan spin

3V3_S5 - 2.018v PM_DSW_PWRGD - 0v PM_BATLOW_L - 2v PM_SLP_SUS_L - 0v

board came in no liquid damage but does not boot. it had a busted cap on ppbus which i replaced and now i have ppbus but no boot. ppbus - 8.58v pp3v42 - 3.42 PM_SLP_S5_L - .003v pp3v3_sus - 1.18v

ran the trace and now have boot! thanks.