Battery Issue?

[Gino1951]

My MacBook Air was running with no issues yesterday. Today I turned it on and it started beeping 3 beep intervals. I assumed that the battery needed charging (?) so I plugged in the adapter. Everything then was running okay. The I noticed that the battery showed 95% charged, so I waited until it was at 100% and unplugged the charger. As soon as I unplugged it everything shutdown. I reconnected the charger everything worked fine and then downloaded CoconutBattery. But the results were okay, but I cannot figure out why everything shuts down. I went to an Apple technician at Best Buy and he told me the battery needs replacement? But the coconutBattery program tells me everything is fine. I also noted that when my charger is connected, once I shut my computer down, the light on the charger only stays on for about 3 minutes, then it goes off! Can anyone help me! Thanks.

Here are my specs:

MacBookAir3,2

OS X version 10.8.5 (12F2518)

Processor 2.4 GHZ Intel Core 2 Duo

Memory 2 GB 667 MHz DDR2 SDRAM

13 inch, Late 2010

OS X version: OS X Yosemite


coconutBattery info:

Age: 1149 days

Loadcycles: 123

OSX Battery status: Good

Battery temperature: 27.4 C

Battery Failure: None

Charging with: 3.1 Watts

Power Adapter: 45 Watts

 

[c55]

3 beeps is a RAM problem. Was the screen black when you turned it on?

 

[Gino1951]

3 beeps is a RAM problem. Was the screen black when you turned it on?

Yes it was and stays black until I connect my power adapter. Then everything works fine.