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Just tried it. It works just fine. so they are interchangeable.

The chip on the board is a 6124E and my replacements are a L6142

I have a 820-01814A lb that shorted back light to the mux. I have some mux chips for a older board " 820-01041" and the numbers I have are very close. Can I use these chips or do I need to pull on off a 2019 lb

I know the MUX is toast..... Does this use the same chip as the 820-01841? Is this MUX available? The connector on the display board is also bad. Is this replaceable or am I just buying a new display as well? Dammit APPLE why did you put this next to this data line. IDIOTS

I pulled them new out of the box. the unit came in with "dead no power". I am the first person to work on it. I will diode check them again. I can change them again as I have already picked the underfill off so now it's not a big deal

UB300 fail. Showed on thermal. Still unable to get 1v1 LDO off pin 35 replaced UB3400 as well. Still no 1v1 LDO off pin 35 either chip. UB3200 and UB3100 do generate 1v1 LDO Still don't have the unit at 20 Anyone have experience with this LB

I have a tricky little board I would like some opinions on. The green light on the charger is intermittent. Some times when you plug it in some times it works some times it does not. "most of the time not" I watch it on the scope and when not working the voltage never comes up and there is...

awesome ty

Board does not switch to 20v Checked all 4 CD3215's (2) PP1V8 LDOD works regardless of port (35) PP1V1 LDO works but is chip specific (53) PP3V3 LDO works regardless of port (75) PP1V8 LDOA works regardless of port How do these all communicate? Do they talk to a outside system like...

I know this is a snow ball's chance on the 9th plane of hell past the river Stix, but if anyone knows were a board view is for this LB please PM me. I have a few pads that are way gone and I need to find the other side. It would also be nice to know the processor power supply resistance...

NO. The CD3215's are not firing it up

U3200 had a small hole in it. I replaced both the CD3215's I checked for CPU shorts and did not find any. 3.42v is present at the CD3215's PP3V42 is present current draw is real low. 0.02A I am a little green with these boards. Am I probably looking at a smoked CPU?

Another update. The reballing did not help. Grabbed another and another and every one is this way. I got a whole bad batch. To the bone yard was purchased on Aliexpress " SZ Xcls Store "

I had another bad LP8550 on another macbook air today. Replaced the IC from the same batch and same problem. I am going to reball it and try the same one again.

Diode checked LED_RETURN lines. All .633. Replaced J8300. Same issue. I will harvest a LP8550 from a known working board. Hard to believe as I have replaced the LP8550 3 times already but there is nothing left. That fixed it! Screwed by the Chinese again! Where should I get these chips...

This machine came in for no backlight. I did not find any water damage and the fuse was good. So I replaced the driver IC U7701 and that fixed the problem "almost" The machine isn't quite right. Along the bottom left of the screen you can tell that some of the back light LEDs are not...

How is the 1V1 LDO enabled? What is the process?

I harvested CD3215's from boards. Reballed them and installed. Still no 1v1 LDO

how can I tell

I hear you that the odds are low but I want to use this to learn on. Thanks 2informaticos, I was measuring the 1v1 improperly. The 1v1 signal is present on the side that was not damaged. On the side I replaced the CD3215's neither one will show 1v1_LDO. Diode checking the 1v8 and 3v3 shows...