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Текущая версия: oldturkey03 (подробности голоса) ,

Название:

CPU fan powers 4 seconds, then stops. Debug power pads work ok.

Текст:

The laptop had some liquid spilled recently. The power connector was dirty and the battery wasn’t charging. I cleaned the contacts and it worked for 2 months.
But now when you press the power button the CPU fan spins for 4 seconds, then shuts off and keeps looping. When I press the power button a lot every now and then after a minute or two it could chime and start to boot.
Once I was able to press Command-R and it loaded the progress bar from left to right very slowly. It reached 100% about 10 minutes later, but never went further than that.
I’ve taken out the boards and cleaned any sticky liquid residue. I disconnected the touchpad/keyboard connector and when I short the Debug Power Pads the fan starts up really loud and I hear the Chime. About 30 seconds later I see the apple logo and then it’s at the login/password screen 1 second later.
I plugged in a USB mouse and select shutdown. It seems to chime and boot every time I short the debug power pins.
Does this mean I have a bad keyboard/power button? I’m concerned about the time it takes to display the Apple logo, maybe that’s just the Debug mode. I’ve tried a Cmd-Opt-P-R too. I don’t want to spend $120 eBay logic repair service if not needed.
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EDIT: At first it did power loop when I disconnected the keyboard and used the Power Pads to power it up. But now the power pads are not working anymore and it just keeps power looping the CPU fan.

Устройство:

MacBook Air 13" Mid 2013

Статус:

open

Принятый ответ:

+537393

Отредактировано: Thomas Tommy ,

Название:

CPU fan powers 4 seconds, then stops. Debug power pads work ok.

Текст:

The laptop had some liquid spilled recently. The power connector was dirty and the battery wasn’t charging. I cleaned the contacts and it worked for 2 months.
But now when you press the power button the CPU fan spins for 4 seconds, then shuts off and keeps looping. When I press the power button a lot every now and then after a minute or two it could chime and start to boot.
Once I was able to press Command-R and it loaded the progress bar from left to right very slowly. It reached 100% about 10 minutes later, but never went further than that.
I’ve taken out the boards and cleaned any sticky liquid residue. I disconnected the touchpad/keyboard connector and when I short the Debug Power Pads the fan starts up really loud and I hear the Chime. About 30 seconds later I see the apple logo and then it’s at the login/password screen 1 second later.
I plugged in a USB mouse and select shutdown. It seems to chime and boot every time I short the debug power pins.
Does this mean I have a bad keyboard/power button? I’m concerned about the time it takes to display the Apple logo, maybe that’s just the Debug mode. I’ve tried a Cmd-Opt-P-R too. I don’t want to spend $120 eBay logic repair service if not needed.
+
+
+
+EDIT: At first it did power loop when I disconnected the keyboard and used the Power Pads to power it up. But now the power pads are not working anymore and it just keeps power looping the CPU fan.

Устройство:

MacBook Air 13" Mid 2013

Статус:

open

Оригинальный сообщение: Thomas Tommy ,

Название:

CPU fan powers 4 seconds, then stops. Debug power pads work ok.

Текст:

The laptop had some liquid spilled recently. The power connector was dirty and the battery wasn’t charging. I cleaned the contacts and it worked for 2 months.

But now when you press the power button the CPU fan spins for 4 seconds, then shuts off and keeps looping. When I press the power button a lot every now and then after a minute or two it could chime and start to boot.

Once I was able to press Command-R and it loaded the progress bar from left to right very slowly. It reached 100% about 10 minutes later, but never went further than that.

I’ve taken out the boards and cleaned any sticky liquid residue. I disconnected the touchpad/keyboard connector and when I short the Debug Power Pads the fan starts up really loud and I hear the Chime. About 30 seconds later I see the apple logo and then it’s at the login/password screen 1 second later.

I plugged in a USB mouse and select shutdown. It seems to chime and boot every time I short the debug power pins.

Does this mean I have a bad keyboard/power button? I’m concerned about the time it takes to display the Apple logo, maybe that’s just the Debug mode. I’ve tried a Cmd-Opt-P-R too. I don’t want to spend $120 eBay logic repair service if not needed.

Устройство:

MacBook Air 13" Mid 2013

Статус:

open