My MacBook Air won't always come on when I open it / press the power button

Hi,
I bought my MacBook Air a few months ago and in that time, a few times the screen has randomly gone black for a few minutes and then come back on again.
This morning I just couldn't get any life out of it at all, and on this forum I found a thread which suggested shaking! Well I had tried the various button options and nothing was working so I shook it hard and now it is working again - thank goodness because I have lots to do and not easy to get to an apple store without planning.
The thing is - it seems to me that if something happens randomly and shaking helps it must be a loose connection? It also seems to be quite a common problem because a number of people have described this and given me this 'temporary' solution. Did anyone find out what is causing this and is it anything I can fix or do I need to take my MBA back to the store? If so - can they fix it there and then or will they give me a new machine - I can't manage without it! Can someone who has had this problem tell me what happened in the end or did the shaking sort it out once and for all? I need a laptop I can rely on..
Advice would be appreciated
Many thanks
Sam

Hi,
I bought my MacBook Air a few months ago and in that time, a few times the screen has randomly gone black for a few minutes and then come back on again.
This morning I just couldn't get any life out of it at all, and on this forum I found a thread which suggested shaking! Well I had tried the various button options and nothing was working so I shook it hard and now it is working again - thank goodness because I have lots to do and not easy to get to an apple store without planning.
The thing is - it seems to me that if something happens randomly and shaking helps it must be a loose connection? It also seems to be quite a common problem because a number of people have described this and given me this 'temporary' solution. Did anyone find out what is causing this and is it anything I can fix or do I need to take my MBA back to the store? If so - can they fix it there and then or will they give me a new machine - I can't manage without it! Can someone who has had this problem tell me what happened in the end or did the shaking sort it out once and for all? I need a laptop I can rely on..
Advice would be appreciated
Many thanks
Sam

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    CR0: 0x0000000080010033, CR2: 0x0000000000000000, CR3: 0x0000000007541000, CR4: 0x0000000000040660
    RAX: 0xffffff8000000000, RBX: 0xffffff800d35a870, RCX: 0xffffff800cf55cd8, RDX: 0xffffff80008a8fcc
    RSP: 0xffffff805e5f3d60, RBP: 0xffffff805e5f3da0, RSI: 0x000000001dcd6500, RDI: 0xffffff800d168778
    R8: 0x0000000000000001, R9: 0xffffff805e5f3e88, R10: 0x0000000000000011, R11: 0x0000000000000000
    R12: 0x0000000000000000, R13: 0xffffff800d168770, R14: 0xffffff800d168778, R15: 0x0000000000000000
    RFL: 0x0000000000010082, RIP: 0xffffff800020c590, CS:  0x0000000000000008, SS:  0x0000000000000010
    Error code: 0x0000000000000000
    Backtrace (CPU 0), Frame : Return Address
    0xffffff805e5f3a00 : 0xffffff8000204d15
    0xffffff805e5f3b00 : 0xffffff80002d1208
    0xffffff805e5f3c50 :
    Model: MacBookPro8,1, BootROM MBP81.0047.B27, 2 processors, Intel Core i5, 2.3 GHz, 4 GB, SMC 1.68f99
    Graphics: Intel HD Graphics 3000, Intel HD Graphics 3000, Built-In, 384 MB
    Memory Module: global_name
    AirPort: spairport_wireless_card_type_airport_extreme (0x14E4, 0xD6), Broadcom BCM43xx 1.0 5.100.198.104.5)
    Bluetooth: Version 2.4.5f3, 2 service, 12 devices, 1 incoming serial ports
    Serial ATA Device: Hitachi HTS545032B9A302, 298.09 GB
    Serial ATA Device: OPTIARC DVD RW AD-5970H
    USB Device: FaceTime HD Camera (Built-in), 0x05ac  (Apple Inc.), 0x8509, 0xfa200000 / 3
    USB Device: Hub, 0x0424 (SMSC), 0x2513, 0xfa100000 / 2
    USB Device: BRCM2070 Hub, 0x0a5c  (Broadcom Corp.), 0x4500, 0xfa110000 / 5
    USB Device: Bluetooth USB Host Controller, 0x05ac  (Apple Inc.), 0x821a, 0xfa113000 / 8
    USB Device: Apple Internal Keyboard / Trackpad, 0x05ac  (Apple Inc.), 0x0245, 0xfa120000 / 4
    USB Device: Hub, 0x0424 (SMSC), 0x2513, 0xfd100000 / 2
    USB Device: IR Receiver, 0x05ac  (Apple Inc.), 0x8242, 0xfd110000 / 3

    Hmm. The problem still may be the RAM - Apple buys the RAM it puts in its machines from third-party vendors (usually Hynix) so it could be a RAM problem.
    There are a couple of things that you can do yourself before taking your machine into an Apple Store or an AASP... download and run an application named Rember that will run a RAM test for you - let it run for a couple of hours or even overnight. If it turns out that your RAM is faulty, Rember will let you know. If it is faulty, then you have a couple of options - replace the RAM yourself or (particularly if you're under warranty still) take the machine to an Apple Store or AASP and have them replace the RAM.
    If Rember finds no fault with the RAM, then you'll need to take it into an Apple Store/AASP and get a free diagnosis on the machine. Three beeps do usually indicate faulty RAM, but if it tests good with Rember you likely have another problem - it could be something as simple as the RAM, somehow, not seated correctly or signs of another hardware problem.
    Run Rember first... call back with results.
    Good luck,
    Clinton

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