Looping chime on booting
I have a macbook air to repair. The problem is the same as here: http://www.youtube.com/watch?v=BSpikNzb0...
Looping chime. It even dont show logo of Mac OS. There just is a grey screen and looping chime until you place a finger on the button of power for 6 seconds.
I tried to reset PRAM, SCM - nothing. It got even worse. Before I reset PRAM it loaded to Windows but keyboard or mouse did not response. When i tried to load MacOS so 'Alt' key worked, it proposed me to select OS to load, but cursor of keyboard nor touchpad worked... Then i reset PRAM and from then chime is looping and it dont load OS at all... Even dont propose me to select OS. Even from external HDD.
Does anyone know a problem?
The problem was in Flash Memory that corrupted. I changed it. installed New Flash Memory removed serial number but computer began to start normally. Thanks to all.
Eugene, where did you get a new Flash Memory? I had a working Macbook until I reset the SMC. Now I need to replace the Flash Memory but it's unclear what this would be or where I would get it. Thanks!
由 Phil Schroeder 完成的
@Phil - The best answer here is bringing your system into an Apple Store. Apple has the needed tools to reborn your systems firmware. I'm not sure if they will do it for free on yours, they did three of our newer systems a few weeks ago.
由 Dan 完成的
Buy a new logic board and swap it. Most flash memory is soldered directly into the logic board.
由 bryantrn 完成的
I was experiencing the same issue with the same symptoms (green light on, webcam didn’t work) and basically my Macbook Air was a paperweight for the last few years until I came upon this post and disconnected the iSight camera and boom it booted up fine… Not quite sure what happened but I did replace the lcd screen maybe something of the webcam broke during that repair.
由 Melton 完成的
I was experiencing a similar problem. The MacBook would go no further than white screen and would continuously restart with a chime. It was a hardware issue and was resolved, as follows:
The way I went about it was to first remove SSD from the logic board, however, I had to put it back because it did not solve the problem,
Likewise, I removed the Bluetooth / airport board and put it back because it too did not solve the problem,
I then removed the I/O cable connection between the logic board and I/O board. This resolved the issue and MacBook booted normally!
I reconnected I/O cable back to logic board so as to narrow down and identify the exact fault.
It turned out that, the I/O cable, I/O board and logic board all were fine. It was the camera cable connected on I/O board which was at fault. I then put a shrinkable sleeve the camera cable to cover up its contacts and left it without connecting it to the I/O board.
The MacBook now boots up normally and works perfectly fine!
由 Sunil 完成的