Currently Being ModeratedFeb 28, 2012 7:03 PM (in response to Pismo)
Pismo, check your system profiler in About this Mac > More Info > Power. I don't know if that is exactly what it is called with Snow Leopard but there ought to be battery diagnostic information buried in there somewhere.
Copy and paste it here.
I'm wondering if your battery is on the verge of failing.
Currently Being ModeratedFeb 28, 2012 7:23 PM (in response to John Galt)
Thank you for helping!
There are two diagnostics - Apple Hardware Test and Power On Self-Test. The POST passed but the AHT failed.
Apple Hardware Test:
Last Run: 2/10/11 3:29 AM
Test Suite: Extended Test
Failure Code: 4SNS/1/40000001: ID0R-0.040
There is battery information though:
Serial Number: D86041701W7DCQ8AQ
Device Name: bq20z451
Pack Lot Code: 0000
PCB Lot Code: 0000
Firmware Version: 0301
Hardware Revision: 0002
Cell Revision: 0162
Charge Remaining (mAh): 5131
Fully Charged: No
Full Charge Capacity (mAh): 6168
Cycle Count: 299
Battery Installed: Yes
Amperage (mA): 2362
Voltage (mV): 8281
Currently Being ModeratedFeb 28, 2012 8:35 PM (in response to Pismo)
OK, that AHT code is normal when the power cord is NOT connected: http://support.apple.com/kb/TS3578
It looks like your battery is just fine also.
Try this: Reset the System Management Controller. Reasons for doing that are many but include the following (bold emphasis added):
The computer doesn't respond to the power button when pressed.
A portable Mac doesn't appear to respond properly when you close or open the lid.
The computer sleeps or shuts down unexpectedly.
On the MBA, the procedure is as follows:
- Shut down the computer.
- Plug in the MagSafe power adapter to a power source, connecting it to the Mac if its not already connected.
- On the built-in keyboard, press the (left side) Shift-Control-Option keys and the power button at the same time.
- Release all the keys and the power button at the same time.
- Press the power button to turn on the computer.
Note: The LED on the MagSafe power adapter may change states or temporarily turn off when you reset the SMC.
Post back with your results.
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