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thanks for the info I will check it out and get back to you

Hey Duke, working on this touchbar mac I'm so freaking confused on where to start PPDCIN_G3H is only pushing out 5 v. Where do i start to look for the issue i checked all power rails resistance to ground and cant find any shorts, I need help to understand how this new system works. Yes its water...

then my question is if you don't have a full hard short how do you find whats causing the connection to be missing finding these issues are nightmares to me how do you handle a situation like this duke. So i guess this is why its better too look for resistance to ground instead of using diode...

It is a 3115 but the short is on pp1v5_s3 but i have had other boards with a untraceable shorts that always kick my ass. How do you find the untraceable shorts when they come your way?

Hey guys this is a general question about finding shorts. This problem happens to me from time to time and i have no clue on what to do. From time to time i will get a board where i find a short to ground, so i then would inject voltage in that circuit, but when voltage is injected the voltage...

Thanks for making my day so sad but i have a question i noticed on the schematic there is an ssd_reset_l is it possible there is a ssd command like the smc reset check out the schematic and tell me what you think

it boots from external and disk utility sees only external drive

Hi duke replaced u9300 still flashing folder any ideas where to go from here.

on u7800 im missing PP3V3_S5. PP3V3_LDO3V is present. END is high but like I said PGD is still missing so i checked PGD for a short to ground and its shorted. Under my Flir gun, the chip is the only thing that is warm on the board.

Yes SMC_PM_G2_EN has 3.402V

Yes duke they are present that was the first rails I checked

Hi guys i managed to get one of these in my store water damaged. Of course upon inspection the water damage was near and around the U7650 which is our same as older models tps chip. Checking around that area i noticed that 5vs5 is missing so i checked for shorts none are present. I checked for...

I guess all i can do is order a u9300 from Louis replace it and keep my fingers crossed ill let you know the outcome.

Nand voltage at r9340 is 2.639V very close to 2.7 PP3V3_S5_SSD is 3.346V Crap was under u9300 L9330 is 1.230V L9340 1.822V

Yes it is there .

Hey guys working on a 820-00239 was water damage near the u9300, lets be clear its not an efi lock because i can boot up with an external drive. When i checked disk utility the drive is missing so we can move on. i ultrasonic that area but still no luck the main voltages going to that chip seems...

Say no more when I removed the u7320 the short was gone but I get it it's a dead dog because it got zapped just thought it had a chance to survive when pbus came back. Mark as solved I waste no more time.

Only history i know is that someone else tried to work on the board, but when it got into my hands it had a short on ppbus, I remember you told me that the cpu usually dies. The short was on U7320 i did not think the short would go away so i replaced the chip and it did ppbus is stable but those...

DSW_PWRGD 3.4, ADAPTER_EN 3.404 Real 85w charger green and orange light present.

PPVRTC_G3 is 3.327 PM_SLP_S5_L is 0V