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3V3 is present on C1706. Repair was made back then "as is" without warranty just because they requested this particular part to be replaced. I did not " repair" the board and I told them I expect it to fail again.

820-3662 Q8020 was blown and I replaced it at the request of the customer (another shop), and did nothing else to solve the possible cause. After some time, may be a month, customer reported that it's not detecting USB 2.0 devices. I tried it and it does detect mice, but not USB 2.0 HDDs. Even...

Customer didn't come back yet. Can we mark it as "closed" for now and if needed will open a new case later on.

The customer only wanted to buy (they can replace it themselves) or replace Q8020 because they spotted that it was fried and brought it to have only this fixed. I replaced and cautioned that the cause is not resolved and quoted them for a future "comprehensive repair" from which I will deduct my...

Q8020 looks burnt. Literally has a hole in it. Afraid to power up and cause damage, as I only have 1 good Q8020 left. Any hypothesis on what can cause this? Also, PP3V3_SUS has 0.7 OHM resistivity to ground. Is this normal? The fucked up donor board is measuring the same resistivity on that line.

Too much. For $50 (I misread) I was going to say worth it. I sold one with SSD, charger, 8 or 16G RAM, board replaced from Apple under the extended program for $900. Fully functional and perfect cosmetic appearance.

larossmann tried to upload picture of U9600 with oxidized pads. Got => Error while saving content: SyntaxError: JSON Parse error: Unexpected identifier "Forbidden"

- Charging normally, this is solved. - Wasted time on U9600 but I'd like to think I may have saved it from near future failure since the pads were oxidized. - Still some heat near U9600 and poking there still restarts laptop! Otherwise working normally. I'm handing it back to client having...

Yes I am sure it is U9600. By the time you replied I had reballed it. I can confirm also that it was not causing the interruptions because it is still doing it, though less. Heating may have reflowed something although I can't see what?! LD was around U9600 and I found what seem to be oxidized...

OK this is becoming interesting. Before I replaced Q7055, it was charging very slowly. I replaced Q7055 and got "battery not charging" and no orange light, only green. 3V42 is present. As I said before, I noticed heat next to U9600, and I noticed that if I tap U9600, fans stop from spinning...

Heat plate or mat (2 small or 1 big) to heat the top case and remove the glass, then keep it heated and scrub with IPA 99%.

I have to close shop. Will test tomorrow the charging and see if it changed after replacing Q7055. And so the lesson is I don't have to hunt for a short to ground on PP1V05_S0 because it will normally have low resistance? If yes, reminds me of the first time I thought I found shorted caps on...

I replaced it from an 820-3330. It is not the same marking on the chip, but it is the same as per the schematics...

I will, but even with Q7055 removed, I have that same low resistance between PP1V05_S0 and ground = 13OHM. Is it normal?

I fixed WD 820-2850 by jumping wires to replace corroded vias/traces from R7052 to R7050, and replaced R7052. U7971 was nicked and J5815 was destroyed with its traces from prior pry damage. Replaced them both. Near them were some corroded components that I replaced. Q7055 was corrosion...

Been there twice: injected 5V instead of 3V42 and once starting removing components without disconnecting MagSafe. Noticed my mistake when I saw the spark. Haven't solved that board yet :/

Also I've been meaning to use something different: a suction blower that usually comes built-in into ironing boards, and are foot-pedal activated. It usually needs direct AC, a big cap, and that foot controller. I was shopping for a used one. They're pretty powerful. Alternatively, could have a...

I did something on my bench until I could get a decent fume extractor. Got an old IBM power supply, added a power switch and alligator clips to the 12V, 5V, 3.42V, lines, and used the same to power a fan for extraction, that blows fumes towards a bigger ventilation fan at the window. I use this...

Oh and did not find any shorted cap on that line near battery level indicator connector, if that's what you mean. BIL is new to me. Unless you can give me the cap # to double check..?

larossmann installed ISL and SMC and removed L6995, and injected 3.4V on pin 2. Got heat at U6990. Removed it and removed C6994 and found that pin 9 is still shorted to ground and resistivity of the line to ground is still 33OHM. So the short to ground is down the line. Can I keep U6990 off the...