-
For $29/mo, we provide access to advanced level technicians who will answer your questions on any Macbook board related matter to the best of their knowledge promptly & walk you through how to solve your problem so you can deliver a working board to your customer.Subscribe Now
A1707 / 820-00928-A Won't boot
- Thread starter BillyE
- Start date
"If I try my volt meter on the new battery I get 0v? The old battery is at about 2.2 volts?"
Did you check on battery direclty, without connecting data cable?
Data cable enables the battery...
Did you check on battery direclty, without connecting data cable?
Data cable enables the battery...
Yeah I just read directly off the battery connector. I was just curious if they had any charge.
If there is a way to tell it to turn on and that might tell us something I’ll be glad to do it
Without enabling the battery???
Irrelevant measurment; battery must be connected to MLB, with its data cable too.
"the display is J4401"
NO, it is J8500.
Work with the board alone on the desk, using known 87W charger.
Just in case, try SMC bypass also.
Will not charge the battery in such case, but let see if turns on at least.
Please, stop to quote entire messages, visible few centimeters above.
Irrelevant measurment; battery must be connected to MLB, with its data cable too.
"the display is J4401"
NO, it is J8500.
Work with the board alone on the desk, using known 87W charger.
Just in case, try SMC bypass also.
Will not charge the battery in such case, but let see if turns on at least.
Please, stop to quote entire messages, visible few centimeters above.
Sorry I'm confused do you want me to reply so that it shows the question I'm replying to like this one, or just reply without it?
Glad to work the board alone on the desk, I'm not sure how to do a SMC bypass but willing to try anything.
thanks
No need to quote an entire post, above visible.
Write directly into bottom reply box, instead of clicking Reply button.
SMC reset and bypass is not the same thing...
boards.rossmanngroup.com
Write directly into bottom reply box, instead of clicking Reply button.
SMC reset and bypass is not the same thing...
HOW TO collection
I hope this "How to" collection will help our members. I will possibly modify this post in time, if updates available. Trigger SMC_ONOFF_L (PMU_ONOFF_L): It reffers to simulate power button function, when the keyboard is not connected. We need to do this when we work with the board...
boards.rossmanngroup.com
Cool, so I searched for ONOFF and see the SW5200 and looks like I can just short 1&2 or 3&4 and that will simulate the power button.
So board alone on the desk, I assume you want me to plug in the USB-C charger and do the SMC bypass, what do you want me to check after that?
Maybe PPVBAT_G3H_CONN at like C7060 pin 1 to see if the charger turns on?
So board alone on the desk, I assume you want me to plug in the USB-C charger and do the SMC bypass, what do you want me to check after that?
Maybe PPVBAT_G3H_CONN at like C7060 pin 1 to see if the charger turns on?
Just check if board turns on in SMC bypass mode...
Checking U3100 I get 5v on F3000, 3.376 on C3108, 1.796 on C3105, 1.802 on C3106 but 0 on C3104 and U3100 feels warm.
Checking UB300 5.19 on FB200, 3.376 on CB308, 1.791 on CB305, 1.796 on CB306, 1.112 on CB304 but only 10.91 on QB300:1 and 7.5 on QB300:4
Checking UB400 same as UB300
Checking UB300 5.19 on FB200, 3.376 on CB308, 1.791 on CB305, 1.796 on CB306, 1.112 on CB304 but only 10.91 on QB300:1 and 7.5 on QB300:4
Checking UB400 same as UB300