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i have a 820-00875 and fixed the backlight chip, because it had some damage around there and also tested Fuse, correct output on both sides, plugged it all in and it worked, put it all back together and when i type in the password to log in it starts to load and then the screen goes black, but...

820-3787 replace the CPU FETs, can you guys tell me which are the ones that i have to replace i have this 820-3787 that has random shutoffs, been reading and duke had posted that was the issue,

PM_SLP_SUS_L - 0v PM_RSMRST_L - 0V PM_PWRBTN_L - 3.4V PM_BATLOW_L - 3.33V PM_DSW_PWRGD - 0V PCH_DSWVRMEN - 3.23V PCH INTRUDER L - 3.05V PCH_INTVRMEN - 3.24V PCH_SRTCRST_L - 3.3 RTC RESET L - 3.3V

This board was taken somewhere else for repair, looks like they cleaned it but no board repair was done, i have tested power aliases to see, but im stuck here, also test short to ground on missing power aliases and got no shorts, did not do ohms to ground, ( i know i should have not posted S4...

diode mode to ground pin2- 1.94 & pin 1-goes back to .OL resistance (ohm scale) between pins 17/18 3.7ohms and 27/28 20.5 ohms of U7100.

820-00165 with damage U7100 pin 12 (pp3v42), replaced U7100 and corrected all other burned caps and resistors also damage around SMC , C5125, L5001, C5001, C5020, REPLACED ALL and also replaced SMC with known working, there was damaged at U1950, replaced also C1950 There was damage at U1900...

i have a 820-01521 with minor liquid damage at and around u8200, and C8200 (replaced both) C6404, C6406, C6415 all damaged, all replaced, also R3108 (2) replaced, PPBUS_G3H 0.69V - Tested ohms to ground - 205 ohms, diode mode 0.108 and can i use...

sent it back, could not figure it our

i checked DP_INT_HPD while a known working display connected and also known year to be compatible. also yes, i checked L8300 having 5v while testing DP_INT_HPD

DP_INT_HPD 0.0v PPVOUT_S0_LCDBKLT 0.0v

there is image and it works perfectly on external display, also i do have 5V on L8300

have a 820-4924 and had very minor liquid on u 8300 and mostly on C8352 pin 2, is this a GPU issue, i seen it pin 2 of C8352 goes to the GPU,

820-00163 no green light, damage was the trackpad was shorting F4800, replaced trackpad and replaced F4800, now short is gone, but no green light, please help, i think SMC, want yalls opinion before doing that. U7000 1- 3.4v 2- 0 3- 0 4- 0.7V 5- 0.7V D7005 1- 16.53V 2- 12.29 3- 16.2V...

820-00165 Damage at C7103 (1) Replaced Damage at U8040, Replaced and ther was minor damage in between L7320, and L7310, also bit on Q7320 Pin 5, No CPU Vcore, PPBUS G3H 8.6v PPBUS_S5_HS_COMPUTING 8.6v PPBUS_S5_HS_OTHER_ISNS 8.6v PP3V42_G3H 3.42v PPVRTC_G3H 3.32v PP5V_S5 5.1v...

820-00426 , ppbus_g3h 3.86 resistance to ground on ppbus_g3h started at 18 kohms and dropping diode mode 0.65, NO GREEN LIGHT U7000 PIN 1 3.4V 5 0.72V 4 0.78V U7100 PIN 5 3.41V PP3V4S_G3H PIN 4 3.3V PIN 1 &2 3.26V (SMC_BC_ACOK) any ideas

yes, according to customer accounts, i tried it and could not duplicate the problem i just switched the whole display, hopefully lol

hey guys, i just want to ask, i have a 2015 iMac 5K with description of lines on display, when they connect external monitor it all goes away and it works perfectly, Known GPU issues?

got this 820-3332 and U8900 was burned, seen at the top, replaced it but still no image or backlight, anything else i should look at or dead ? board turns on, just no image or backlight

Logic board does work, image on external image works fine, USB works, doesn't look like had liquid damage at J8500

820-00239 had small liquid damage at U8501, so i replaced U8501, U8510, U8500, did not work so i also replaced U8400, i tried a new display, and still nothing, it this helps any, the SMC had some damage coming from around PIN 161 (PM_SLP_S3_L) PM_SLP_S3_L is present by the way 3.3V