The issue:

1. With the new battery, the MagSafe light stays green. System Information sees the battery at 33% (2308mAh) but shows 0 Amperage and "Not Charging."

2. If I unplug the MagSafe, the laptop immediately shuts off.

3. I reinstalled the old (bulging) battery to test. It shows 100% (4322mAh) and "Fully Charged," but the laptop still shuts off immediately if the power cord is disconnected.

4. CRITICAL FINDING: The battery indicator button (on the left side) ONLY works when the MagSafe is plugged in. When plugged in, it shows 3 LEDs (consistent with 33%). When unplugged, the indicator button does nothing.

5. I have already:

- Reset the SMC and NVRAM/PRAM multiple times.

- Verified I am using an 85W MagSafe adapter.

- Reseated the battery connector and inspected the logic board pins.

- Ran Disk Utility First Aid.

Is it possible the original bulging battery blew a current-sensing resistor or a MOSFET on the logic board? What specific components should I test with a multimeter to diagnose why the battery rail is not being energized?

Here is an image (maybe) of the coconut app and the system report.

Here is an image of the system report with the bad battery

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⟐ Answered June 19, 2026 at 18:50 MST

⟐ Answer edited June 19, 2026 at 13:15 MST

I have some display assembly's here that are not labeled for which model they were from ...... is there a small marking on the hinges or something that I can go by to ID which is which? There are no stickers or numbers I can cross check present. I am fearful to just try them on different models and see what works in case their incompatibility will cause some harm..... I cannot find any part numbers anywhere. Late 2013 and Mid 2014 displays (661-8153, 2015 is (661-02360). Under the clutch cover and removing the antenna, still there is nothing that I see that is recognizable in google to suggest a model year.... stumped.

⟐ Commented June 19, 2026 at 7:45 MST

⟐ Commented June 19, 2026 at 6:13 MST

⟐ Answer accepted June 19, 2026 at 4:36 MST

Thank you very much.

⟐ Commented June 19, 2026 at 4:26 MST

⟐ Answer edited June 18, 2026 at 6:57 MST

TIA

⟐ Answered June 17, 2026 at 16:05 MST

Here's what's going on:

I have an A1226 15" MacBook Pro (mid 2007) with serial number: W872218YX92. I can't get it to turn on; whether it's plugged into the AC adapter or on a battery, I get no visible or audible response from the machine when I push the power button--none of the lights turn on, none of the fans spin, etc.

I've read about the nVIDIA 8600GT issue, but I don't get any response from the machine at all, so I'm not sure if that's what the problem is. The other thing I've read could be at fault is the 'Left I/O' board', but this thing won't turn on when using AC or a battery. One thing I haven't tried yet is to open it up and check the top cover power switch; is the power switch something that frequently breaks?

Lastly, when the MagSafe adapter is plugged into the machine, the LED on it always glows green--whether or not the battery is plugged in. When the battery is plugged in, the 'charging' LEDs on it do not light up or blink and thus the battery does not charge.

⟐ Commented June 17, 2026 at 15:16 MST

I am getting video as I can put a flashlight behind the screen and actually see the boot processing, same thing with an external display.

I read a bit on the backlight fuse and the driver chip too but cant seem to find some images on internet for my specific model.

I took a picture of my bord near the video connector to show you guys where I think my fuse is (the one with a little P on it) and how can I check if its the fuse or the driver...

Thanks

Mickael

⟐ Commented June 17, 2026 at 5:31 MST

⟐ Commented June 11, 2026 at 15:46 MST

⟐ Answered June 11, 2026 at 14:55 MST

⟐ Answered June 11, 2026 at 8:23 MST

⟐ Commented June 11, 2026 at 5:16 MST

- To make sure it is no virus I plugged in a usb mouse which switches of the trackpad.

- According to a lot of forums I had to reset the PRAM/NVRAM, like explained here: http://support.apple.com/kb/PH14222?view...

- I removed the battery to see if it was swollen. I also tested the mbp without the battery in the body to make sure it was not the battery who caused the problem.

- I removed the trackpad and cleaned it with alcohol.

Nothing helped! What is the next step? The strange thing is that after a PRAM reset the mouse will act normal for about 30 minutes. Then the problem starts acting up again.

Any ideas?

⟐ Commented June 11, 2026 at 3:04 MST

Thanks if anyone can give me a hand.

⟐ Commented June 11, 2026 at 2:17 MST

⟐ Answered June 09, 2026 at 18:32 MST

⟐ Answered June 09, 2026 at 16:25 MST

⟐ Answer edited June 09, 2026 at 4:34 MST

I have MacBook Pro M4 A3112.(Nov'24). this is my first Macbook.

Initially display screen had some damage, so got the screen replaced and i notice both Wifi and Bluetooth has stopped working.

I took back to the repair guy who helped to replace the screen, but he has no clue why Wifi and Bluetooth are not working.

please find the attached the screenshots and photos I took as part of initial diagnosis I could do.

Please advise, what could be the issue and how to resolve this ?

Thanks

RB

Hi @danj

I did reformat whole Macbook and reinstalled OS. Seems issue still persists.

I connected the MacBook to my router using Rj45 cable with the help of connector so I can access wired network connection to internet.

However I tried to do offline diagnostic and I got the error CNW001 . Have attached screenshot.

Power charger wasn't connected to macbook when I ran the diagnostic so the error PPP020 can be ignored in the image here, as I see the MacBook is working fine when charger is connected.

Let me know what option i have to resolve this CNW001 error.

I am using wired connection for Internet for now, not a substantial solution.

Thanks

RB

I used an Ethernet cable and was able to connect to internet.

The pic was taken with ethernet cable on !

⟐ Commented June 08, 2026 at 5:06 MST