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I'm awaiting more ISLs, I think the ones I got are dodgy and R7105 has blown again twice with these "new" ISLs. I used a 10 ohm is the power rating important? I used a 1/16 10 ohm as it was the closest I had to the 1/10W 20 ohm. I've buldozed the whole ISL section and replaced everything and now...

Ok I reflowed the whole ISL area & I replaced C7105 again. I used r7700 on my 3437 donor as a replacement for R7105. pin 1 R7105 is now reading 60K ohm .445 diode mode. Same on pin 2 of R7105. Removed F7140 C7140 voltage is 0V. The battery is not plugged in though, that should only have voltage...

Thanks I do have some 4.7 ohm so I'll use that for now. Yes C7105 was changed, though it was from a donor board so it may of been damaged though it did not read short nor does it now. Is it worth changing the mosfet Q7155? I was always taught when changing fets you should always change the pair...

ISL is still getting really hot, and looks like R7105 is blown again. Not as much as before though, now it's only gone up to 70 ohm.Pin 1 on R7105 is reading OL. Replaced D7105 now pin 1 on R7105 was reading but I didn't note it down and now when I go to measure it jumps between .367M and OL...

Ok U7100, C7125 and Q7130 have been replaced. Pin 1 on U7100 is now reading 330K ohm. Resistance between pin 17/18 is 3 ohms and resistance between 27/28 is 19.8ohm.

Looks like I've got another dead ISL. Checked all the components around it and they all seem fine. Checked which pins do not go to components in the area and checked them and there also fine. The only one which is short is ISL pin 24 CHGR_UGATE pin 1 of Q7130. Confirmed on two donor boards...

Something on the ISL line most be shorted as the ISL is now getting really hot when it was not earlier. That explains why the original failed, but none of the immediate surrounding components are reading short nor getting hot only the ISL itself.

Yes PP3V3_S5 Is steady 3.33V. Yes board has only been tested on the desk nothing plugged into the board, besides the DC in board obviously. Everything else is either removed from the board, or did not come with the board as this is a ebay "untested" job. PM_PWRBTN_L is 3.41V steady. 0.357V...

I checked both SMC_ONOFF_L and SMC_S5_PWRGD_VIN and both were dropping to 0 when shorting R5115. Is there a particular line I should check? I wanted to check a few other SMC outputs but they were missing, ie 0V. WIFI enable on SMC pin 63 for example.

R5115 SMC_ONOFF_L I don't have a keyboard deck hence why I used that instead.

Yes 3V3_S5 and PP3V3_SUS are present. Yes shorting the power debug switch pulls the reset line low and is resetting the SMC. .

Is PP3V3_S4SW_SNS a required rail for the board to post? It's 0v and not short. A lot of the items on that rail are not installed on the board like the camera area and the current sense area. U5440 for example and it's surrounding components. According to the schematic there critical but...

Yay I'm finally getting somewhere. Just noticed pin 2 on the ISL was only 4.2V. Checked R7105 and it was in the K ohm range when it's suppose to be 20 ohm. Replaced it, confirmed it's is now 20 ohm and pin 2 is back to 15.15V and pin 1 is now 0.004V so it looks like the ISL is finally working...

I've reinstalled the original ISL and now pin 1 is resetting. First time you put your probes on it it's .5V than climbs to 1 than 2 than 11 than 15 and resets. Doesn't look like it's the ISL, it looks like it's trying to do it's job but somethings resetting it or it's resetting itself because...

Thanks for the clarification. Not sure if this is relevant or not but I removed the donor ISL and measured it's pins 17 to 18 and 27 to 28 and there 4.8 ohm on the donor ISL. All the measurements previously provided were from this donor ISL. I then did the same on the original ISL the board came...

Ok fair enough. I’ve had a lot more experience with resistance values than diode mode hence why I was referencing both as I wasn’t exactly sure whether .1 would be considered low or not, but I do know that K ohms usually is normal operation. ok I tried re installing u7100 to make sure it’s...

Pin 1 with the fuse removed is .1117 & pin 2 is .453 Pin one resistance is reading all over the place, it starts at Millions than dips down to 30K than resets starts at 10K and goes up to 32K than rinse and repeat. I think I need to replace this meter I'm constantly having to change the battery...

Sorry just didn't paste it. Pin 1 is 15.31V. Is 4.32 too high for pin 3? According to Logiwiki their example had pin 3 as 3.81 and the threshold minimum is 3.2 so I'm thinking 4.32 is too high but than checking all the components on PPDCIN_G3H_ISOL which controls that line are matching their...

Ok I've remeasured this time at the corresponding components rather than the pins of U7100. See below: pin 2 use C7105: 15.15V Pin 3 use R7111: 4.32V Pin 9 use R5431: 0.030V Pin 12 use C7102: 3.42V Pin 13 use R7100: 3.38V Pin 14 use R5187: 0V Pin 15 use R5422 0.047: Pin 17 Use C7150: 0V Pin 19...

Because I haven’t done much of this so I have no idea what can cause what? I was just asking if the dc in board could be giving me what I’m seeing. Ok now pin 3 on the ISL is 4.3V. R7110 and R7111 had some ugly joints so I've touched it up. Both and the cap are reading as they should and do...