Random shutdowns!!

Hello there, my macbook(2ghz intel core duo,2gb ram, version 10.4.11) has started to turn itself off for no apparent reason, can anyone give me any idea what is going on please. Here is the log from the last occurance.
Thanks, Mark.


Sep 7 14:31:46 localhost kernel[0]: hi mem tramps at 0xffe00000
Sep 7 14:31:46 localhost kernel[0]: PAE enabled
Sep 7 14:31:46 localhost kernel[0]: standard timeslicing quantum is 10000 us
Sep 7 14:31:46 localhost kernel[0]: vm_page_bootstrap: 509018 free pages
Sep 7 14:31:46 localhost kernel[0]: mig_table_max_displ = 71
Sep 7 14:31:46 localhost kernel[0]: Enabling XMM register save/restore and SSE/SSE2 opcodes
Sep 7 14:31:46 localhost kernel[0]: 92 prelinked modules
Sep 7 14:31:46 localhost kernel[0]: ACPI CA 20060421
Sep 7 14:31:46 localhost kernel[0]: AppleIntelCPUPowerManagement: ready
Sep 7 14:31:46 localhost kernel[0]: AppleACPICPU: ProcessorApicId=0 LocalApicId=0 Enabled
Sep 7 14:31:46 localhost kernel[0]: AppleACPICPU: ProcessorApicId=1 LocalApicId=1 Enabled
Sep 7 14:31:46 localhost kernel[0]: Copyright (c) 1982, 1986, 1989, 1991, 1993
Sep 7 14:31:46 localhost kernel[0]: The Regents of the University of California. All rights reserved.
Sep 7 14:31:46 localhost kernel[0]: using 10485 buffer headers and 4096 cluster IO buffer headers
Sep 7 14:31:46 localhost kernel[0]: Enabling XMM register save/restore and SSE/SSE2 opcodes
Sep 7 14:31:46 localhost kernel[0]: Started CPU 01
Sep 7 14:31:46 localhost kernel[0]: IOAPIC: Version 0x20 Vectors 64:87
Sep 7 14:31:46 localhost kernel[0]: ACPI: System State [S0 S3 S4 S5] (S3)
Sep 7 14:31:46 localhost kernel[0]: Security auditing service present
Sep 7 14:31:46 localhost kernel[0]: BSM auditing present
Sep 7 14:31:46 localhost kernel[0]: disabled
Sep 7 14:31:46 localhost kernel[0]: rooting via boot-uuid from /chosen: 4F49DD86-A082-4764-AAFD-E09AE9AA8BC4
Sep 7 14:31:46 localhost kernel[0]: Waiting on <dict ID="0"><key>IOProviderClass</key><string ID="1">IOResources</string><key>IOResourceMatch</key><string ID="2">boot-uuid-media</string></dict>
Sep 7 14:31:46 localhost kernel[0]: USB caused wake event (EHCI)
Sep 7 14:31:46 localhost kernel[0]: FireWire (OHCI) Lucent ID 5811 PCI now active, GUID 0017f2fffe760f46; max speed s400.
Sep 7 14:31:46 localhost kernel[0]: Got boot device = IOService:/AppleACPIPlatformExpert/PCI0@0/AppleACPIPCI/SATA@1F,2/AppleAHCI/PRT2@2/IOAHCIDevice@0/AppleAHCIDiskDriver/IOAHCIBlockStorageDevice/IOBlockStorageDriver/ST96812AS Media/IOGUIDPartitionScheme/Customer@2
Sep 7 14:31:46 localhost kernel[0]: BSD root: disk0s2, major 14, minor 2
Sep 7 14:31:46 localhost kernel[0]: jnl: replay_journal: from: 2680832 to: 6550016 (joffset 0x1bf000)
Sep 7 14:31:46 localhost kernel[0]: CSRHIDTransitionDriver:robe:
Sep 7 14:31:46 localhost kernel[0]: CSRHIDTransitionDriver::start before command
Sep 7 14:31:46 localhost kernel[0]: CSRHIDTransitionDriver::stop
Sep 7 14:31:46 localhost kernel[0]: IOBluetoothHCIController::start Idle Timer Stopped
Sep 7 14:31:46 localhost kernel[0]: HFS: Removed 1 orphaned unlinked files
Sep 7 14:31:46 localhost kernel[0]: Jettisoning kernel linker.
Sep 7 14:31:46 localhost kernel[0]: Resetting IOCatalogue.
Sep 7 14:31:46 localhost kernel[0]: GFX0: family specific matching fails
Sep 7 14:31:46 localhost kernel[0]: display: family specific matching fails
Sep 7 14:31:46 localhost kernel[0]: Matching service count = 2
Sep 7 14:31:46 localhost kernel[0]: Matching service count = 4
Sep 7 14:31:46 localhost kernel[0]: Matching service count = 4
Sep 7 14:31:46 localhost kernel[0]: Matching service count = 4
Sep 7 14:31:46 localhost kernel[0]: Matching service count = 4
Sep 7 14:31:46 localhost kernel[0]: Matching service count = 4
Sep 7 14:31:46 localhost kernel[0]: Previous Shutdown Cause: 0
Sep 7 14:31:46 localhost kernel[0]: display: family specific matching fails
Sep 7 14:31:46 localhost kernel[0]: GFX0: family specific matching fails
Sep 7 14:31:46 localhost kernel[0]: ath_attach: devid 0x1c
Sep 7 14:31:46 localhost kernel[0]: GFX0: match category IOFramebuffer exists
Sep 7 14:31:46 localhost kernel[0]: mac 10.3 phy 6.1 radio 10.2
Sep 7 14:31:46 localhost mDNSResponder-108.6 (Jul 19 2007 11: 41:28)[30]: starting
Sep 7 14:31:47 localhost kernel[0]: yukonosx: Ethernet address 00:17:f2:2f:d4:2a
Sep 7 14:31:47 localhost kernel[0]: AirPort_Athr5424ab: Ethernet address 00:17:f2:50:bd:30
Sep 7 14:31:46 localhost lookupd[43]: lookupd (version 369.6) starting - Sun Sep 7 14:31:46 2008
Sep 7 14:31:46 localhost DirectoryService[41]: Launched version 2.1 (v353.6)
Sep 7 14:31:47 localhost diskarbitrationd[36]: disk0s2 hfs BF4AB5A7-7EA3-3F8A-AC3E-776E098E9180 Macintosh HD /
Sep 7 14:31:47 localhost launchd: Server 2b1f in bootstrap 1103 uid 0: "/usr/sbin/lookupd"[43]: exited abnormally: Hangup
Sep 7 14:31:48 localhost kernel[0]: Registering For 802.11 Events
Sep 7 14:31:48 localhost kernel[0]: [HCIController][setupHardware] AFH Is Supported
Sep 7 14:31:48 mark-bruces-computer configd[34]: setting hostname to "mark-bruces-computer.local"
Sep 7 14:31:48 mark-bruces-computer lookupd[61]: lookupd (version 369.6) starting - Sun Sep 7 14:31:48 2008
Sep 7 14:31:48 mark-bruces-computer kernel[0]: display: Not usable
Sep 7 14:31:48 mark-bruces-computer /System/Library/CoreServices/loginwindow.app/Contents/MacOS/loginwindow: Login Window Application Started
Sep 7 14:31:49 mark-bruces-computer loginwindow[64]: Login Window Started Security Agent
Sep 7 14:31:50 mark-bruces-computer mDNSResponder: Adding browse domain local.
Sep 7 14:31:53 mark-bruces-computer /System/Library/PrivateFrameworks/Apple80211.framework/Resources/airport: Currently connected to network markandsabina
Sep 7 14:31:55 mark-bruces-computer configd[34]: executing /System/Library/SystemConfiguration/Kicker.bundle/Contents/Resources/enable-network
Sep 7 14:31:55 mark-bruces-computer configd[34]: posting notification com.apple.system.config.network_change
Sep 7 14:31:55 mark-bruces-computer lookupd[133]: lookupd (version 369.6) starting - Sun Sep 7 14:31:55 2008
Sep 7 14:31:57 mark-bruces-computer configd[34]: target=enable-network: disabled

How hot is it running and how hot is it where you live?

how's your battery? do you leave it in or take it out? and how is the power at your house, any noticable dips - lights flicker, etc?

is the shutdown abrupt, or does it go through a process before it shuts down?

do any apps hang prior to shutdown?

have you loaded anything recently?

Erm, doesn't seem too hot, it's not very hot in Brighton at the moment, i've not loaded anything new onto it, i'm not sure what the condition of my battery is, should i be taking it out?...oh and it just pings straight off, no shutdown process at all, hope that covers it!! Thank you for your time guys.

leave the battery in, for sure. i was just confirming that you ran with it in. in case of a power dip, you could cause data corruption or have the thing shut down on you without it. if you can run for a reasonable time off the cord, you should be fine.

something that makes the machine shut down abruptly would lead me to believe it may be hardware related. i'm not sure by the log what it could be, but if no one has an answer here, i would try seeing if you can chat online with an apple tech and see if they can make heads or tails out of it - at least before bringing the thing in.

Thanks Eric, it now won't even power up without the power cable attached, looks like my battery has died

that could be it then...

in that case, it could be the battery or the power unit. you could chance just buying a new battery, but if it is the power unit, you'll just eat through another battery. do you have a mac store anywhere close where they can check it for you? or easy access to another battery?

I'll take it into my local apple store, thanks again.