Have you solved the problem yet? Because I’m having the same issue as you. I reflashed the BIOS using the CH341A and now I’m getting an orange light when powering on, even when I flash back the previous backup...

The logo freeze errors on the 7400 2-in-1 are often caused by:

1. The SSD hard drive of the device.
2. The ALC3254 audio IC.

Please remove them from the circuit and restart the device...

I can’t download the PDF file. Could you please send me the download link again? Thank you very much....

Thank you very much. I’ve found the cause and fixed it — the laptop is now working perfectly again. The main issue was a faulty battery, which I’ve replaced with a new one. Interestingly, this problem only occurs on Intel-based models, while the MacBook Air M1 still works fine without a battery — quite a difference!...

"Could you please analyze the sensors in more detail? And one more thing — does not having a battery really cause such a big drop in performance? Thank you so, so much!"...

Help me ! PlsGcM86f

In the MacBook Air 2020 model, this type of error is often caused by the CPU. Try removing the CPU and reflowing — that might solve the problem.

Hey everyone,

I’ve got a MacBook Air A2179 that got some water damage through the keyboard. Now it powers on, shows the Apple logo, but just stays stuck there — no startup chime, no keyboard backlight, and no progress bar under the Apple logo.

When I try to boot into Internet Recovery (Option + Command + R), the mouse cursor is extremely slow and laggy — like when I lift my finger off the trackpad, the cursor keeps drifting slowly for a second or two.

I opened it up and found some corrosion around the LED driver IC area on the logic board. I cleaned...