Not sure if I can get some direction on this I replaced a screen on my laptop without disabling the autoboot now my laptop won’t power on. I have read in some forums some people having the same issue but they could power on without having the battery connected my laptop will not power on with battery connected or if battery is disconnected. I was going to attempt to find a short on the logic board so I purchased a usb-c volt and amp reader and it appears as if I’m getting normal power to the laptop 20v’s and amps vary. So I’m thinking I’m not seeing a short in the logic board could it be that I may have a defective power button? I’m not sure any thoughts on what I should try next?
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MacBook Pro 2017 13" will not turn on after screen replaced?
- Thread starter RicardoV
- Start date
First of all, welcome to the forum!
Didn't disconect the battery, when swapped the screen?
Check for voltage on all coils.
Post the exact 820-xxxx code of your board.
Didn't disconect the battery, when swapped the screen?
Check for voltage on all coils.
Post the exact 820-xxxx code of your board.
Yes battery was disconnected when I installed the screen. I removed that pancake screw and unplugged the battery only thing I didn't do was disable autoboot which everyone says you have to do. I haven't removed the board yet but should be the #820-00239 051-00515 (A1706 EMC 3163).
Sorry I am a complete noob to troubleshooting these macbook computers. Because it involves more work on the mother board I don't have any experience besides what I watch on youtube.
Did you check for USB activity and external video?
Caps Lock light reacts?
Caps Lock light reacts?
Something happened in the replace process.
Check for knocked off components..
Is better to find a serious service shop and go there.
Check for knocked off components..
Is better to find a serious service shop and go there.
Last edited:
You will need to check voltages in several points, as all big coils first.
Need to identify the board (820-00840/875 matbe) and get schematic/boardview.
Need to identify the board (820-00840/875 matbe) and get schematic/boardview.
Check this.
drive.google.com
820-00923-A_.rar
drive.google.com
All big coils.; some of them (iGPU) will not have voltage as normal.
We need your voltage readings to see how to continue.
We need your voltage readings to see how to continue.
Ok man I've had to watch a few videos before I attempted this but I hope it makes sense so I tested a whole bunch of coils with the majority coming out with 0 v. There is a coil L7030 that is the biggest on I could find on this board and I am getting a reading of 13v's on both pin 1 and 2. At one point after about 10 mins the amps dropped significantly to about .02-.04 and that same coil L7030 was only getting 3V's on both pins.
You should check if always get 13V at F7000, not L7030.
But we need voltages from other coils; like L7600/60.
But we need voltages from other coils; like L7600/60.
Ok first man thanks for your patience I have tested F7000 I am getting 13V and I also tested L7600 I am getting 5v and L7660 is getting 3V.
I also followed through the chain followed PPVBAT_G3H_CHAGR_REG path and found C7050 and C7051 and 13v was present at both of these locations. Any other locations you'd like me to check out?
I also followed through the chain followed PPVBAT_G3H_CHAGR_REG path and found C7050 and C7051 and 13v was present at both of these locations. Any other locations you'd like me to check out?
L7410/20/30 don't have voltage as normal, check all other coils.
Also see which voltage remains when the current drops to 0.02A.
Also see which voltage remains when the current drops to 0.02A.
Ok here's the info:
L7410 - goes up to 0.16v but then goes back to 0
L7420 - 0v
L7430- 0v
L7210 - 0.46v
L7220 - 0.48v
L7700 - 1v
L7900 - 1v
L8000 - 1v
L8050 - 1v
L9400 - 2.7v
L3500 - -0.03v to 0.03v
L8410 - 0v
When amps drop I test all the coils and voltage is unchanged so the F7000 stays at 13v's.
L7410 - goes up to 0.16v but then goes back to 0
L7420 - 0v
L7430- 0v
L7210 - 0.46v
L7220 - 0.48v
L7700 - 1v
L7900 - 1v
L8000 - 1v
L8050 - 1v
L9400 - 2.7v
L3500 - -0.03v to 0.03v
L8410 - 0v
When amps drop I test all the coils and voltage is unchanged so the F7000 stays at 13v's.
I adverted you, do NOT check L7410/20/30.
L7210/20 voltage could be good, but should b3e compared with good working board.
Do you note this voltage droping from 1V in few seconds?
You've forgot L8020.
Don't you get 1.2V at L7900?
ALWAYS check DC voltage at output pin of a coil.
L7210/20 voltage could be good, but should b3e compared with good working board.
Do you note this voltage droping from 1V in few seconds?
You've forgot L8020.
Don't you get 1.2V at L7900?
ALWAYS check DC voltage at output pin of a coil.