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Turns out I did actually have it in the right spot. I'm so sick of this board. I removed CB702/3/4 as that's the area my jumper was in and PPBUS_G3H to ground is now 0.1ohms.

I'm an idiot, I really do apologize for wasting your time. A jumper I ran some time ago came loose when I was cleaning corrosion in the area and it seems I soldered it one pad over from where it should've been, a ground pad :| Now to tackle yet another issue I created on this board. Some...

This is minutes after power is disconnected. It will do this every time I check. Diode mode between ppbus_g3h and L9080/580 is both .460 My thought was the short could be a mosfet because there was no discernible heat coming from anywhere on the board. Sorry, I don't understand what you mean...

Titles says it. When I turn the board on one fan kicks up to max speed immediately. The other does absolutely nothing. Was fixing an audio issue around U6400 but cannot say whether or not that's when it started. I can confirm once upon a time the board worked fine though. Not sure if it was...

What am I comparing on L9080? Like PP2V5_NAND_SSD1 to ground? to ppbus_g3h? to PP2V5_SW1_TPS62180_SSD1? Sorry for my ignorance. ppbus_g3h to ground when I first touch its about 5ohms then drops to 3ohms after 2-3 seconds then settles around 2.5ohms, but when I hold it a long time (20+ seconds)...

Injected 1v 1a into ppbus_g3h and nothing got the slightest bit warm. Thought I was crazy but freeze spray revealed nothing also.

battery board was corroded so I didn't bother plugging it in. there was corrosion around Q7065 and Q7401. haven't replaced anything yet. board refuses to boot with by-3200 cable, not sure if the battery charging circuit would stop boot or if there is another underlying issue. sits at 20v 100ma...

It's got dust on it from sitting so I'm gonna dunk it in the ultrasonic and see if that changes anything.

I know it's been a while but last I recall it had image just no backlight. LCD is known good.

I really hate this board. Plugged in to test, heard pop, killed power. Inspected and didn't see anything obvious. Plugged back in and now it's stuck at 5v 45ma. Don't think I've messed with a 5v board so not sure what to check first. Edit: 5v on all ports Edit 2: ok so ppbus_g3h is short to ground

Still no backlight. Back at this board because my A1706 is annoying the shit out of me. Basically impossible to use while charging on the left side. I fixed it twice and it worked fine for a couple days then back to the same issue. Rather than fixing it right now I'd like to just upgrade to this...

There's continuity, reads 0.025

Ok so triggering SMC_ONOFF_L causes a spark and PM_PWRBTN_L goes to 0v then back to 3mv when open again. I didn't understand what you meant by "7 OF 10" PP3V3_LDO3V - 3.2v PP1V25_VREF - 1.21v PP3V1_RTC - 0.19v Also it's probably worth noting when I plug the board into power it draws 0.2a for a...

PPBUS_G3H - 13.13v (w and w/out batt) PP5V_LDO5V - 4.92v PP3V3_S5 - 0v PP5V_S4 - 0v PP1V2_S3 - 0v SMC_RESET_L - 3.42v PM_PWRBTN_L sits at 3mv Short SW9988 or 89 to ground? Or short SW9988 to 89? Edit: I believe this had liquid damage around the backlight caps on the backside of the board. I...

PP5V_LDO5V is present. Does that mean U7800 is bad?

Still learning this shit so please bear with me. PPBUS_G3H is present but PP3V3_S5 is 0v. I'm lost in the schematics lol. Where is PP3V3_S5 created and what else should I check?

Ignore me I'm dumb. Had my desktop psu current set low so it was maxing out and restarting the system. It actually works fine.

Just tried testing with a known good battery. Turns on and fires right up but refuses to charge. Still stuck in that 5v-19v cycle. Not sure where to go from here ¯\_(ツ)_/¯

Ok so messed with it for a bit and here to report back. Yes all ports behave the same. I inspected the board and noticed a loose cap on the mesa circuit (C4955) and reflowed it. There was a bit of dust on the board so I dunked it in the ultrasonic. Plugged the bare board into my BY-3200 cable...

Haven't had the chance to inspect yet. About to pull it out now. Only the second A2141 board I've worked on so not familiar with common problems. Figured I'd ask if this is indicative of anything specific. But it just jumps from 5v to 19v for a few seconds then the meter goes blank like it was...