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Re: Macbook A1932 Intermittent Backlight Issue 820-01521
Run a wire - jumper wire. Not any conductive wire. Proper jumper wire.Comment
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Re: Macbook A1932 Intermittent Backlight Issue 820-01521
Was about to suggest the same but believe the cap is 0201 - nasty boards and with high density. It will be tricky to do.Comment
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Re: Macbook A1932 Intermittent Backlight Issue 820-01521
To your meter (red probe) for measuring the voltage.Comment
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Re: Macbook A1932 Intermittent Backlight Issue 820-01521
Hi thanks for guiding, updating that when the problem occurs again.
One more thing very quickly is that the trackpad isnt vibrating anymore, installed a new one to cross check - same issue. Visual inspection of cable and connector seems okay to me.Comment
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Re: Macbook A1932 Intermittent Backlight Issue 820-01521
Try a PRAM reset.
Reference:
https://discussions.apple.com/thread...2#250809547022Comment
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Re: Macbook A1932 Intermittent Backlight Issue 820-01521
Did that! No Luck! I Think there might be some issue with the caps near the connector on the board. I ll perform and inspection and let you know. Currently its all plugged in with the jumper done and kept for the issue to re-occur so that we can check the voltage of IPD_LID_OPENComment
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Re: Macbook A1932 Intermittent Backlight Issue 820-01521
Check your software settings to confirm the haptic feedback is enabled.Comment
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Re: Macbook A1932 Intermittent Backlight Issue 820-01521
Checked the Pads of J6700 related to PPBUS_G3H_TPAD_FLT in resistance mode in Pads 41,39,37,42 and 40. The result is 0 ohms. I think this particular line is giving trouble. The cap C6700 seems ok.
Will check L6700 and updating.Comment
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Re: Macbook A1932 Intermittent Backlight Issue 820-01521
Very interesting.
Check fuse @ F6700. Is it still conducting ?
What is the voltage on pin # 1 of this fuse ?
If required, remove F6700 and check if pin #1 is able to offer the required voltage.Comment
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Re: Macbook A1932 Intermittent Backlight Issue 820-01521
Do check if this short condition disappears if you remove the trackpad cable.
This voltage leg is connected to PPBUS_G3H which is a key power rail to the entire logic board so it must be working if the unit is powering up ok.
Remove the fuse. Remove all power and check the resistance to ground of this fuse F6700, pin # 1.
What is the reading ?Comment
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Re: Macbook A1932 Intermittent Backlight Issue 820-01521
What is the resistance to ground of this fuse, pin #2?
Ok. Where is the short?
Check both sides of the coil.Comment
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Re: Macbook A1932 Intermittent Backlight Issue 820-01521
Resistance Value in Pin #2 in 0 ohms.
Replacing the Fuse. Updating in a bit.Comment
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Re: Macbook A1932 Intermittent Backlight Issue 820-01521
Can you share the meter setting?
If you short your meter probes, do you see the same resistance readings?Comment
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Hi everyone,
I'm working on a MacBook Air 2020 (A2337, board 820-02016) and running into a strange USB-C issue. I've gone through quite a bit of testing and part replacement, but I'm stuck β hoping someone here can shed some light.
π Original Issue
The machine initially wouldn't negotiate 20V over USB-C β stuck at 5V.
Diagnosis showed PP1V5_UPC0_LDO_CORE shorted to ground.
I replaced U3100 (UF400) using a donor board (A2179), and the machine powers on fine now.
β οΈ New Problem: One USB-C Port Only Works in One Orientation... -
hi
i whant unlock macbook pro A1932 2019 whit ibridge 9,3 ;
i change efi files find on files mina T2 activator 1,4 and use for activation mina T2 activator 1,3 , but fault ssh?
i use mina T2 ramdisk activator 1,0 and 3,0 . but whon t work ?
have you other programme or method compatible whit this macbook ibridge 9,3 for bypass ?
I need help or information?
Does anyone have the minat2 activator 1.4 software?
Or did they use it for bypass macbook air 2019 a1932 with new ibridge 9.3?
Thank yo...03-12-2025, 10:14 AM -
Subject: Help Needed: MacBook A1278 (3115) No PPBUS_G3H Issue
Hello everyone,
I'm working on a MacBook A1278 with the 3115 logic board and facing an issue with no PPBUS_G3H voltage. Here's what I've checked so far:- U7000 Measurements:
- Pin 3 has 0V, even though R7012 shows 16.5V from PPDCIN_S5_CHGR.
- Resistors:
- I measured R7010 and R7011 with one leg disconnected, and both tested OK.
Based on these findings, I believe U7000 needs to be replaced. However, I have a related question:- If I also decide to replace the SMC, do I need to order it pre-programmed,
- U7000 Measurements:
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Hello there
I have problem with Macbook Pro 15" 2017, model 2017, MB code 820-00928.
I bought it as broken with some artefacts on the screen, first I thought that this is problem with ribbon cable but after inspectiing ribbon cable I know it is fine. I tried to reinstall macOs and then I figured out that this must be something with GPU as installation freezes at the end (when drivers are loaded). I installed Windows and was able to install every each of drivers except GPU driver, as soon as I tried to install GPU driver - black screen and restart.
...11-21-2024, 05:25 AM -
Hello,
I have a problem with an Asus X553MA motherboard. Sometimes the system works fine, but other times the CPU voltage drops to 0V. In most cases, the laptop reboots after a few seconds due to the voltage drop.
Occasionally, it shows the ASUS logo or boots into the BIOS. Sometimes it can stay in the BIOS for hours without issue.
I checked the board with a thermal camera, but I couldn't find any overheating or leaking capacitors.
Unfortunately, I donβt have access to the schematic.
It seems to me that when I bend the board, something changes.
Could this...
Comment