Hey everyone,
Usually, I'm not the type to ask for help, but this time, I'm calling on your wisdom and expertise
I've seen what this community can do, so I'm pretty sure you guys can help me out.
Here's the deal: I noticed my MacBook got stuck in a boot loop. After opening it up and doing some initial troubleshooting, I found that the boot loop stops only when the trackpad is unplugged.
Now, just so you know, the trackpad actually works — I tested it with another motherboard and it's all good. Same for the cable, no issues there. The problem is only with this motherboard (820-00840).
Another weird thing I noticed: when the trackpad is plugged in, the fan doesn't spin. But when it's unplugged, the fan runs just fine.
I checked with L4800 and C4800, no shorts. Also got 5V on PP5V_S4_TPAD_CONN.
Honestly, I'm a bit stuck on what to do next to find the root cause.
Oh, and important to mention: I did something I probably shouldn't have, but I wanted to test it out — I waited for the Mac to boot without the trackpad, then plugged the trackpad in hot.
It worked for about 20 seconds before it rebooted again.
So yeah, that's the situation! Looking forward to your bright ideas! Thanks a ton
Usually, I'm not the type to ask for help, but this time, I'm calling on your wisdom and expertise

Here's the deal: I noticed my MacBook got stuck in a boot loop. After opening it up and doing some initial troubleshooting, I found that the boot loop stops only when the trackpad is unplugged.
Now, just so you know, the trackpad actually works — I tested it with another motherboard and it's all good. Same for the cable, no issues there. The problem is only with this motherboard (820-00840).
Another weird thing I noticed: when the trackpad is plugged in, the fan doesn't spin. But when it's unplugged, the fan runs just fine.
I checked with L4800 and C4800, no shorts. Also got 5V on PP5V_S4_TPAD_CONN.
Honestly, I'm a bit stuck on what to do next to find the root cause.
Oh, and important to mention: I did something I probably shouldn't have, but I wanted to test it out — I waited for the Mac to boot without the trackpad, then plugged the trackpad in hot.
It worked for about 20 seconds before it rebooted again.
So yeah, that's the situation! Looking forward to your bright ideas! Thanks a ton

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