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have you tried testing with a known good display and cable?

ok i ran a wire like you said. i do get 5.13v on c7600 now. im guessing something is screwed with u7501?

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No Title under the microscope it looks perfect. not sure if the photo attached will be that great compared, but maybe im missing something.

its strange for sure... i get no fan spin, no chime, no video/backlight. what i did find strange was the corrosion i did find ( with microscope) was in those 2 random places, which kinda makes me think some one either cleaned it first or the liquid didn't settle on u6100 or u1950 but the may...

R7551 does spike to different voltages( tested 4 times highest 1.3v- lowest 0.028v) as soon as i plug in power. no corrosion on or around u6100 even on the test points. u1950 pin8 3.42v.

liquid damage was on r7520,r7521,r7523 as well as r8164. i check those for the correct resistance all measured good. No voltage on L7520 and y1905 pin1 is 0.003v pin2 0.0v pin3 pulsing from 0.160v to 0.189v, pin4 0.0v

sorry i should have mention those as well. ppbus_g3h is 8.6v and pp3v3_s5 is 3.3v. smc_reset_L is at 3.34v at r5100 but no voltage at r7100.

I've got this 820-3437b that is not powering on. it did have very minor signs of water damage. i check around to find that i had some missing and low voltage on a few power rails. pp5v_s4rs3 0.0 pp5v_s0 0.0 pp3v3_s4 .041v pp3v3_s3 .080v pp3v3_s0 .060v pp3v3_s4sw_sns .041v not really sure where...

I got this 820-3332 that is not posting video. At first it did post video so i ran asd os 3s150, after about 3 min no more video, machine is still running but no video. Shut it down and rebooted to asd EFI 3s150 it got almost to the memory test and boom no video but still running. I was...

lol was thinking about that thanks.

might as well close this thread this board is going in the donor pile. ty

yep. did that before checking resistors. 10 seconds after posting here i noticed 11 components missing that all seem to go to cpuvcore, replaced them from donor had to run 3 wires. Looks like some one slipped with a screw driver or some shit. will test in the morning. Surprised this computer...

i got this 820-2915 that boots and runs awesome but shows no hardware detected where the wifi symbol is. i check the inductor L3404 and have 3.32v on both side when the card is connected. Not really sure where to go first on this thing. i did find that a couple resistors measured a little low...

problem solved. thanks for running me threw the diag process. Now for the other ones.

lol probably. ill change it out and report back.

ya i noticed that but still no continuity

no continuity on pin 4. 6 7 have continuity threw the cable. looks like its the connector?

sorry pin 6 was .450 pin 7 .473 didn't change when i unplugged the screen

both pins at 1.051 in diode mode with screen plugged in and 1.053 without screen. SMC_LID 3.4V SORRY pin6-7 diode mode .450-.473