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If there is a way to tell it to turn on and that might tell us something I’ll be glad to do it

Yeah I just read directly off the battery connector. I was just curious if they had any charge.

We can work on it more tomorrow, I'm gonna take a break at least for the moment. I appreciate the help!

5.195 volts and .307 amps

ok I'm stupid, I'm getting 5.187 volts .084 amp with battery and display only plugged in. I "assumed" J8500 was the display, the display is J4401. Sorry

Same 0 amps.

yes

Just one I got off Amazon. Product Model J7-c , Product Name: USB Digital Tester https://www.amazon.com/gp/product/B08N6YMH23/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&th=1

Sorry I thought you meant the USB meter booting. When I plug it in it takes a hot second for it to boot up to show the power going thru it. I don't know if the board is booting. I warned you I was a newbie! lol

Yeah I checked both batteries not connected to anything.

Not sure I understand your previous comment "Каковы показания USB-метра? (20 В / 0,800 А)?"

With the battery only disconnected it just loops at 5 volts? If I disconnect the battery and the Battery management cable then it boots to 19.88 volts. If I try my volt meter on the new battery I get 0v? The old battery is at about 2.2 volts? I guess they are both just discharged?

I put the board back in and tried to reset the SMC no good, it won't boot at all so the resetting the PRAM didn't work either. Yes if I have just the board out it does boot the USB meter, goes from 5v to 19.8 almost immediately.

I think so? I googled resting both but neither seemed to do anything. To to be honest maybe I should try again. I know at one point I reassembled and forgot the power button ribbon under the audio jack? So maybe I tried resetting with that disconnected? Who knows I've tried a bunch of stuff.

Yes, it says it's a 96W charger, I also replaced the battery thinking that might be it, but no avail. Yeah I checked the USB-C areas because it seemed to most likely based on what I found on the internet. But since it wasn't looping it didn't seem likely.

OK, I'm a newbie at this so I apologize in advance. I have a A1707 15" Touch MacBook Pro that won't boot.... 99% of the time. When I put the USB meter on it, I can see it got from 5.1v to 19.85v almost immediately and pull 0 amps. I've pulled the board and done a lot of checks but still at a...