Not so random shutdowns...

Question

Hi,
My Macbook is just over a year old now still under applecare, I had random shutdowns before and did the firmware update which fixed it. Yesterday, I had the +please hold down the power button...+ message and so did thinking little of it, after all it is not uncommon to have to do it once in a while. Since then though it has been intermittently restarting all on its own and occasionally throwing up the +please hold power...+ message. Interesting to note is the optical drive noise when it restarts itself. I know how it should sound, the kind of mechanical movement sound that happens when you restart normally (or launch parallels and windows grabs hold of your drive). However, occasionally on these restarts it pauses during this sound several times making the same noise but stuttering through it... Strange!
It seems that I can often make it restart or throw up the power button message by just lifting up the front of the computer, as you would if you were turning it around or something. This leads me to believe it's a hardware fault... Looking under the battery compartment the two outside screws that are on the battery connection side were loose and nearly falling out so I tightened those back up, still the problem persists.
After the last restart message I copied this error report, I have no idea what to look for, just wondering if anyone can see anything helpful?
panic(cpu 1 caller 0x001A4A55): Unresolved kernel trap (CPU 1, Type 13=general protection), registers:
CR0: 0x8001003b, CR2: 0x00270000, CR3: 0x00e08000, CR4: 0x000006e0
EAX: 0x00000000, EBX: 0x00025fde, ECX: 0x02fa4d90, EDX: 0x24188000
CR2: 0x02f67af8, EBP: 0x13f7bfc8, ESI: 0xfc52147b, EDI: 0x0000009c
EFL: 0x00010046, EIP: 0x00101a00, CS: 0x00000004, DS: 0xb018000c
Backtrace, Format - Frame : Return Address (4 potential args on stack)
0x2f67968 : 0x128d08 (0x3cc0a4 0x2f6798c 0x131de5 0x0)
0x2f679a8 : 0x1a4a55 (0x3d24b8 0x1 0xd 0x3d1cc8)
0x2f67ab8 : 0x19aeb4 (0x2f67ac4 0xe 0xffe10048 0xc)
0x13f7bfc8 : 0x19b28e (0x2f67b0c 0x1 0x19ad3b 0x2f97d90) No mapping exists for frame pointer
Backtrace terminated-invalid frame pointer 0xbffffb58
Kernel version:
Darwin Kernel Version 8.10.1: Wed May 23 16:33:00 PDT 2007; root:xnu-792.22.5~1/RELEASE_I386
Model: MacBook1,1, BootROM MB11.0061.B03, 2 processors, Intel Core Duo, 1.83 GHz, 1 GB
Graphics: Intel GMA 950, GMA 950, Built-In, spdisplaysintegratedvram
Memory Module: BANK 0/DIMM0, 512 MB, DDR2 SDRAM, 667 MHz
Memory Module: BANK 1/DIMM1, 512 MB, DDR2 SDRAM, 667 MHz
AirPort: spairportwireless_card_type_airportextreme (0x168C, 0x86), 1.1.9.3
Bluetooth: Version 1.9.0f8, 2 service, 1 devices, 1 incoming serial ports
Network Service: AirPort, AirPort, en1
Network Service: Parallels Host-Guest, Ethernet, en2
Network Service: Parallels NAT, Ethernet, en3
Serial ATA Device: WDC WD1200BEVS-60LAT0, 111.79 GB
Parallel ATA Device: MATSHITACD-RW CW-8221
USB Device: Built-in iSight, Micron, Up to 480 Mb/sec, 500 mA
USB Device: Bluetooth USB Host Controller, Apple, Inc., Up to 12 Mb/sec, 500 mA
USB Device: IR Receiver, Apple Computer, Inc., Up to 12 Mb/sec, 500 mA
USB Device: Apple Internal Keyboard / Trackpad, Apple Computer, Up to 12 Mb/sec, 500 mA
I have tried a PMU reset, PRAM reset and whatever it is that happens when you hold the power button when you turn it on to make it beeeeeeep... The issue happens with or without the power cable attached.
Unless anyone can suggest anything here I'll be taking it to the repair centre...
Thanks for reading!

Answer 1

Ok, this is not an answer but it may help you a little: have you checked your logs? It may be an indication of what has happened there. If you don't know the drill: go to console under applications/utilities, select logs, and go there to /library/logs/panic.log. Some information may appear there, for instance if there is some consistent cause like one of your processors, some specific fault.
Not much, I know, but at least you may glean something out of it.