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Internal speakers (left and right) work fine, not muffled at all. The only issue is the left headphone not having full volume--it does work, just very, very low volume (~10%). It's very similar to when an amp blows/fails, how you can still hear the volume, but it's super low. I hope that makes...

Working on an 820-3330 that has a headphone issue; the left channel only is very muffled/restricted, as if it's not being boosted/amplified properly. It's at around 10% of normal proper volume. Right channel works great. 1. Already replaced jack. 2. Replaced U6201, as it had seen liquid. 3...

Same here. It's funny, because not only do people think that having expensive tools will make the work "easy", but they also try to haggle on repair costs because they also think it's easy, even though they have the expensive equipment! Hilarious. Do you guys charge more for tampered boards, or...

Oh I agree 100%, definitely, no doubt about it; I edited my last post since the point the OP is making is very clearly about not selling repair service if you can't do it properly (for a second, I thought this was another "look how fucked up this is" thread, and wasn't quite impressed, lol). I...

You have to start somewhere, and a lot of people get very eager to "make money" once they perform one successful repair. It's just the nature of the business; it's much more appealing to a shop/board owner to save $100.00-300.00 on board repair costs and attempt to do it themselves (knowing that...

Sorry, duke.

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Duke, how are you checking if they're sanded? I just got in 40 chips and they look pretty good, but do have extremely light "scratches" (1 or 2, about 1/6th the width of the chip itself) on random areas of the top surface; not concentrated towards edges or anything. The bottoms look pretty good...

I know duke mentioned cleaning the ME properly would not kill the camera/isight, and he is MUCH more knowledgeable than I am, but I have cleaned the ME on dozens of 3435/3437 boards and a large percentage of the time, iSight appears to no longer work ("no camera detected") after the cleaning...

Could still be APFS issue...which causes it to not show as bootable when holding shift. I'd not assume it can't see SSD yet.

Not yet; I've got it for sale, though. I've actually been using it myself for 3 weeks now, no issues yet. This one has also been kept "sleeping" the entire time between charges. Not one shut down yet, knock-on-wood. The 3662 is the first one I repaired, actually.

Same here, replaced all three on all boards. I replaced them on 4 boards total--one 3787, one 3662 and two 00138. Let the two 00138 units literally sleep/stay on for 2 weeks each with 1-3 hours periods of usage every few days mixed in (personal use by me, casual browsing/low-stress stuff). Not a...

I've actually been thinking about automotive stuff, but need the market to get larger (WRT Tesla/EV). Can't imagine how dreadful sourcing parts for that stuff would be, but I suppose at a certain level electronics are electronics. As long as shit is being made in China, it will be available to...

Pretty much what I figured, thanks Duke. I like pragmatic information that's not tainted with undue optimism, so I appreciate it. Going to have to learn to pivot with this stuff, so maybe focusing on data recovery and learning the ins and outs is going to be absolutely necessary. Shifting to...

Hey Duke! Yeah, I feared there may be crap under there, and in the interest of not having this unit come back, I went ahead and pulled SMC. There was a tiny bit of crap, so I went ahead and replaced SMC and unit is working well so far! :) Thanks, Duke!

It's me! You have saved me so much time the past few years; can you send me a PM? I want to get your contact for some specific questions I've had. I just edited my previous post (page 2) to address one I've been curious about. :)

Yeah I've been doing forced-updates for years (you may have even been the one that showed me how several years back on AR forums!), but didn't have files for the 2015+ models, so only for <2014. This will help with the newer stuff, too, and also really aid in cleaning some of those pesky ME...

Thank you for this! This will help save a lot of time...getting tired of constantly wiping SSDs and re-downloading stress tests and whatnot. Thank you so much!

I have a bad habit of finding new information shortly after posting: I was looking over Q5040 area on schematics and saw several signals come from (of course) the SMC, and combined with the inconsistent readings at Q5040, and finding no shorts to explain the cycling/bouncing signals, I decided...

Working on an 820-3332 with no power; s5/g3h/3v42/vrtc all present, but found PM_SLP_SUS_L missing...oh no. PP3V3_S5_PWRCTL present at C7940. SMC_BATLOW_L is present at Q5040. At Q5040 things are a bit weird, and I checked several times (a dozen+). Sometimes when I measure Q5040, pin 1 and pin...