Why does my Mac go black after plugging in USB?

My problem is, I wanted to download music and upgrade my iPhone with the USB so I plug it in an my screen turns black and wen I plug it in to charge it's blinking green very lightly. How do I make my screen visible again to see if the problems inside?
Please help I'm beginning to freak out nobody here seems to know the prob..
Thank you

What you describe sounds like a hardware issue. You need to get it checked out by Apple.

Similar Messages

Why does my mac only work when plugged in?

I have a late 2010 macbook air 11 inch. The battery condition is normal and about has 650 cycles. The light on my charger is green and my computer only stays on when the charger is plugged in. When I unplug it the computer just turns off and my battery says its not charging and that the power source is the adapter. Do I need a new one or is this fixable?

Definitely below the 1,000 max cycle count > Mac notebooks: Determining battery cycle count
Reset the SMC > Intel-based Macs: Resetting the System Management Controller (SMC)

Why does my Mac wake up after "clicking" sleep with my mouse?

When any user on my iMac tries to "sleep" the computer using the mouse and any "sleep" comand on either the user screen or as a logged in user the computer "re-awakens" by itself. If the power button on the back of the iMac is pressed the computer will go to sleep and stay that way until "awakened" by any normal means (mouse click, keystroke, or turning on a periphial like the printer, which is normal and expected).
Can anyone help explain why "clicking" sleep with the mouse does not allow my computer to stay "sleeping"?

Tried another mouse?
Tried resetting SMC?
Reset SMC. http://support.apple.com/kb/HT3964

Why does my Mac not restart after resetting SMC ?

I have a MacBook white intel base 2.4 duo mid 2008. I reset the SMC because the message kept coming that was going to shutdown. If you did not select cancel it would shutdown. Since then it will not restart? The choices were sleep , cancel or shutdown . Performe all the trouble shooting I could find it still came up with message
Any ideas
Regards
Denis

how did you do the SMC reset? the following article tells how to do this:
http://support.apple.com/kb/HT3964
use the section for batteries that can be removed to perform the reset then see if it will start up
if it doesn't what OS are you running?

Why does my Mac screen suddenly go dark? Sometimes it stays dark for an indefinite period after waking up from sleep.

Why does my Mac screen suddenly go dark? Sometimes it stays dark for an indefinite period after waking up from sleep. I have to open and shut the monitor screen to get it to light up again.

Might try posting in the MacBook Pro laptop forum. This is the Mac Pro desktop forum.
Also see:
OS X: When your Mac doesn't sleep or wake

Why does my mac sometimes start with a black and white fizzy screen at times? Should i be concerned?

Why does my mac sometimes start with a black and white fizzy screen at times? Should i be concerned?

Nope, not ever. Take it in for service.

Why does my Mac Mini go into a safe boot mode after put to sleep?

Why does my Mac Mini go into a safe boot mode after I put it to sleep?

HI, can you tell us how you know it's Safe Mode?
Not sure if this applies to the new Macs, but if not I doubt it'll hurt anything...
After using Safe Boot, to return to a normal startup, execute this command in Terminal or the command line:
sudo nvram boot-args=""
http://support.apple.com/kb/HT1455

Why does my mac mini not recognize camera when plugged in?

why does my mac mini not recognize my capera when it is plugged in?

What model of Mac Mini and what camera do you have?
Are you connecting it via USB or other ways?

Why does my mac book keep shutting down? I mean it's on and then off suddenly

Why does my mac book keep shutting down? I mean it's on and then off suddenly

Do any informative dialogs appear after you restart it?
Power or other problems related to unexpected system sleep, shutdown, lights or fans call for an SMC reset. Read all the steps.
Before Resetting the SMC
Try each of the following steps in this order before you reset the SMC. Test the issue after completing each troubleshooting step to determine if the issue still occurs.
Press Command + Option + Escape to force quit any application that is not responding.
Put your Mac to sleep by choosing the Apple () menu from the upper-left menu bar and then choosing Sleep. Wake the computer after it has gone to sleep.
Restart your Mac by choosing the Apple () menu from the upper-left menu bar and then choosing Restart.
Shut down your Mac by choosing the Apple () menu from the upper-left menu bar and then choosing Shut Down.
Resetting the SMC on Mac portables with a battery you can remove
Shut down the computer.
Disconnect the MagSafe power adapter from the computer, if it's connected.
Remove the battery (to remove the battery - click here: MacBook or MacBook Pro).
Press and hold the power button for 5 seconds.
Release the power button.
Reconnect the battery and MagSafe power adapter.
Press the power button to turn on the computer.
Still having problems? Replace steps 6 and 7 with the following:
Reconnect just the MagSafe power adapter.
Press the power button to turn on the computer,
Then reconnect the battery.
Resetting the SMC on portables with a battery you should not remove on your own
Shut down the computer.
Plug in the MagSafe power adapter to a power source, connecting it to the Mac if it's not already connected.
On the built-in keyboard, press the (left side) Shift-Control-Option keys and the power button at the same time. The power adapter indicator light will cycle off / on once.
Release all the keys and the power button at the same time.
Press the power button to turn on the computer.

Why does my IPod shuffle stop after a few hours playing on shuffle when it should go for days?

Why does my IPod stop playing after a few hours on shuffle when it should play for days?

A few possibilities... (Each numbered item is a separate thing to check or try.)
(1) What does the shuffle's light do when you connect it to USB?
(2) If the docking cable plug is not fully inserted, it may not have a good connection for charging. Make sure the docking cable plug is fully inserted into the shuffle's headphones jack, as shown in this document
iPod shuffle (4th generation): Not seen in iTunes
(3) If there are other USB devices connected to your computer at the same time, try disconnecting other devices (including USB hub) so that the shuffle is the only device connected to a direct USB port, to see if that makes a difference (you can leave standard USB keyboard/mouse connected if used).
(4) If you have a USB power adapter (such as from an iPhone, iPad, or other device), that plugs into the wall outlet, as a test, connect the shuffle's docking cable to the adapter and connect the shuffle. Does it change from a power adapter?
(5) Some newer Windows PCs (if you use Windows and not a Mac) may have a "feature" that shuts off full power to the USB port when a connected storage device is no longer mounted by the system. An iPod is a storage device, and after syncing, iTunes unmounts the iPod's disk (if you are using automatic syncing). If Windows shuts off full power to the USB port, the battery cannot charge. To see if this is the problem, does the iPod appear in iTunes when it is connected, even though the battery is not charging? If it does, select the iPod in iTunes so that you see its Summary screen. There is an option (checkbox) there for Enable disk use. If it's not already checked, check that box and Apply. Enabling disk use keeps the iPod's disk mounted continuously, so Windows will keep the USB port at full power (and the battery will charge). If the iPod now charges, there may be a way to disable this "energy saver" feature in Control Panels, so that you can turn OFF Enable disk use. NOTE: When Enable disk use is turned ON, you need to Eject the iPod in iTunes before physically disconnecting it.

Why does my mac sleep before I can put in the password?

why does my mac sleep before I can put in the password?

So you press the Power button to start up the machine, it goes through the startup process, the login window appears, and the machine sleeps before you can enter your password? Do I understand the problem correctly?
Is the battery fully charged? Is the LED on the MagSafe plug lit, and if so, is it green or orange?
If the adapter plug is not lit, rest the SMC:
http://support.apple.com/kb/HT3964
If it still doesn't light after that, troubleshoot the AC adapter:
http://support.apple.com/kb/TS1713
Post back with answers to the above questions and any results from the SMC reset or adapter troubleshooting.

Why does my mac mini run great for first half hour then run so slow almost to a stop?

why does my mac mini run fine then after a half hour runs very slow?

EtreCheck version: 2.2 (132)
Report generated 4/30/15, 3:58 PM
Download EtreCheck from http://etresoft.com/etrecheck
Click the [Click for support] links for help with non-Apple products.
Click the [Click for details] links for more information about that line.
Click the [Click to remove] links for help removing adware.
Hardware Information: ℹ️
    Mac mini (Late 2012) (Technical Specifications)
    Mac mini - model: Macmini6,1
    1 2.5 GHz Intel Core i5 CPU: 2-core
    16 GB RAM Upgradeable
        BANK 0/DIMM0
            8 GB DDR3 1600 MHz ok
        BANK 1/DIMM0
            8 GB DDR3 1600 MHz ok
    Bluetooth: Good - Handoff/Airdrop2 supported
    Wireless: en1: 802.11 a/b/g/n
Video Information: ℹ️
    Intel HD Graphics 4000
        Thunderbolt Display 2560 x 1440
System Software: ℹ️
    OS X 10.10.3 (14D136) - Time since boot: 7:15:27
Disk Information: ℹ️
    APPLE HDD HTS545050A7E362 disk0 : (500.11 GB)
        EFI (disk0s1) <not mounted> : 210 MB
        Macintosh HD (disk0s2) / : 499.25 GB (475.54 GB free)
        Recovery HD (disk0s3) <not mounted> [Recovery]: 650 MB
USB Information: ℹ️
    Apple Inc. BRCM20702 Hub
        Apple Inc. Bluetooth USB Host Controller
    Apple, Inc. IR Receiver
    Apple Inc. Display Audio
    Apple Inc. Apple Thunderbolt Display
    Apple Inc. FaceTime HD Camera (Display)
Thunderbolt Information: ℹ️
    Apple Inc. thunderbolt_bus
        Apple Inc. Thunderbolt Display
Gatekeeper: ℹ️
    Mac App Store and identified developers
Startup Items: ℹ️
    FanControlDaemon: Path: /Library/StartupItems/FanControlDaemon
    Startup items are obsolete in OS X Yosemite
Problem System Launch Daemons: ℹ️
    [failed]    com.apple.mtrecorder.plist
Launch Agents: ℹ️
    [loaded]    com.oracle.java.Java-Updater.plist [Click for support]
Launch Daemons: ℹ️
    [loaded]    com.adobe.fpsaud.plist [Click for support]
    [failed]    com.apple.spirecorder.plist
    [loaded]    com.macpaw.CleanMyMac3.Agent.plist [Click for support]
    [loaded]    com.oracle.java.Helper-Tool.plist [Click for support]
User Launch Agents: ℹ️
    [not loaded]    com.jdibackup.JustCloud.autostart.plist [Click for support]
    [loaded]    com.jdibackup.JustCloud.backupstart.plist [Click for support]
    [loaded]    com.jdibackup.JustCloud.notify.plist [Click for support]
    [loaded]    com.macpaw.CleanMyMac3.Scheduler.plist [Click for support]
    [running]    com.spigot.SearchProtection.plist [Click for support]
User Login Items: ℹ️
    iTunesHelper    Application Hidden (/Applications/iTunes.app/Contents/MacOS/iTunesHelper.app)
    CleanMyMac 3 Menu    Application Hidden (/Applications/CleanMyMac 3.app/Contents/MacOS/CleanMyMac 3 Menu.app)
Internet Plug-ins: ℹ️
    FlashPlayer-10.6: Version: 17.0.0.169 - SDK 10.6 [Click for support]
    Flash Player: Version: 17.0.0.169 - SDK 10.6 [Click for support]
    QuickTime Plugin: Version: 7.7.3
    JavaAppletPlugin: Version: Java 8 Update 45 Check version
    Default Browser: Version: 600 - SDK 10.10
Safari Extensions: ℹ️
    Slick Savings Adware! [Click to remove]
    Ebay Shopping Assistant Adware! [Click to remove]
    Searchme Adware! [Click to remove]
3rd Party Preference Panes: ℹ️
    Fan Control [Click for support]
    Flash Player [Click for support]
    Java [Click for support]
Time Machine: ℹ️
    Time Machine not configured!
Top Processes by CPU: ℹ️
         4%    WindowServer
         2%    fontd
         0%    taskgated
         0%    notifyd
         0%    cloudpaird
Top Processes by Memory: ℹ️
    836 MB    kernel_task
    82 MB    WindowServer
    66 MB    JustCloud
    66 MB    SubmitDiagInfo
    66 MB    loginwindow
Virtual Memory Information: ℹ️
    12.00 GB    Free RAM
    4.33 GB    Used RAM
    0 B    Swap Used
Diagnostics Information: ℹ️
    Apr 30, 2015, 08:42:48 AM    Self test - passed
    Apr 29, 2015, 09:04:50 AM    /Users/[redacted]/Library/Logs/DiagnosticReports/com.apple.WebKit.WebContent_20 15-04-29-090450_[redacted].crash

Why does my screen turn black when I play iTunes while working on iPhoto?

Why does my screen turn black when I play ITunes while working on iPhoto? I can't click off of the screen but get a message that reads Shut down computer by pressing button in back then turn computer back on by pushing button in back. That's followed by Chinese letters (which I cannot read). I have had other problems when playing iTunes (actually, a radio station on the Internet) while working on iPhoto. Before, I got a window that would pop up and tell me I had no disk space available, that I would have to quit applications that were open. Not many were open.
It would be nice if I could solve this problem once and for all.
Thanks in advance for all the suggestions. I truly appreciate your help.
Jan

That was easy. Thanks. Jan
Interval Since Last Panic Report: 1949305 sec
Panics Since Last Report:          1
Thu Feb 6 15:29:32 2014
panic(cpu 1 caller 0xffffff80002c4794): Kernel trap at 0xffffff7f81d89ff3, type 14=page fault, registers:
CR0: 0x0000000080010033, CR2: 0xffffff7acd4a2a7c, CR3: 0x0000000085d3b000, CR4: 0x0000000000000660
RAX: 0xffffffff4bffff56, RBX: 0x0000000000000000, RCX: 0x0000000000000001, RDX: 0x0000000000000000
RSP: 0xffffff807867b7c0, RBP: 0xffffff807867b800, RSI: 0xffffff7acd4a2a7c, RDI: 0xffffff8065292000
R8: 0x0000000000000001, R9: 0x0000000000000000, R10: 0xffffff7f81d44200, R11: 0xffffff800f8b45e8
R12: 0xffffff8065292000, R13: 0xffffff807867b860, R14: 0x0000000000000001, R15: 0xffffff7acd4a2a7c
RFL: 0x0000000000010286, RIP: 0xffffff7f81d89ff3, CS: 0x0000000000000008, SS: 0x0000000000000010
CR2: 0xffffff7acd4a2a7c, Error code: 0x0000000000000000, Faulting CPU: 0x1
Backtrace (CPU 1), Frame : Return Address
0xffffff807867b470 : 0xffffff8000220792
0xffffff807867b4f0 : 0xffffff80002c4794
0xffffff807867b6a0 : 0xffffff80002da55d
0xffffff807867b6c0 : 0xffffff7f81d89ff3
0xffffff807867b800 : 0xffffff7f81d8a694
0xffffff807867b890 : 0xffffff7f81d8b4ed
0xffffff807867b8d0 : 0xffffff7f81d472a1
0xffffff807867ba40 : 0xffffff7f81d8bd6d
0xffffff807867bb00 : 0xffffff7f81d44346
0xffffff807867bb60 : 0xffffff8000655f3e
0xffffff807867bb80 : 0xffffff800065681a
0xffffff807867bbe0 : 0xffffff8000656fbb
0xffffff807867bd20 : 0xffffff80002a3f08
0xffffff807867be20 : 0xffffff8000223096
0xffffff807867be50 : 0xffffff80002148a9
0xffffff807867beb0 : 0xffffff800021bbd8
0xffffff807867bf10 : 0xffffff80002af140
0xffffff807867bfb0 : 0xffffff80002dab5e
      Kernel Extensions in backtrace:
         com.apple.GeForce(7.3.2)[7E1D7726-416F-3716-ACCB-E1E276E35002]@0xffffff7f81d390 00->0xffffff7f81dfbfff
            dependency: com.apple.NVDAResman(7.3.2)[97284661-2629-379E-B86B-D388618E8C30]@0xffffff7f808 b0000
            dependency: com.apple.iokit.IONDRVSupport(2.3.4)[7C8672C4-8B0D-3CCF-A79A-23C62E90F895]@0xff ffff7f8089e000
            dependency: com.apple.iokit.IOPCIFamily(2.7)[5C23D598-58B2-3204-BC03-BC3C0F00BD32]@0xffffff 7f8082b000
            dependency: com.apple.iokit.IOGraphicsFamily(2.3.4)[D0A1F6BD-E66E-3DD8-9913-A3AB8746F422]@0 xffffff7f80865000
BSD process name corresponding to current thread: iPhoto
Mac OS version:
11G63
Kernel version:
Darwin Kernel Version 11.4.2: Thu Aug 23 16:25:48 PDT 2012; root:xnu-1699.32.7~1/RELEASE_X86_64
Kernel UUID: FF3BB088-60A4-349C-92EA-CA649C698CE5
System model name: iMac10,1 (Mac-F2268CC8)
System uptime in nanoseconds: 11526391261403
last loaded kext at 23020191300: com.apple.driver.AppleHWSensor    1.9.5d0 (addr 0xffffff7f8234b000, size 28672)
last unloaded kext at 522057763087: com.apple.driver.AppleFileSystemDriver    13 (addr 0xffffff7f8254c000, size 12288)
loaded kexts:
com.apple.driver.AppleHWSensor    1.9.5d0
com.apple.driver.AppleBluetoothMultitouch    70.12
com.apple.filesystems.autofs    3.0
com.apple.iokit.IOBluetoothSerialManager    4.0.8f17
com.apple.driver.AudioAUUC    1.59
com.apple.driver.AppleMikeyHIDDriver    122
com.apple.driver.AppleHDA    2.2.5a5
com.apple.driver.AppleUpstreamUserClient    3.5.9
com.apple.driver.AppleMikeyDriver    2.2.5a5
com.apple.driver.AppleBacklight    170.2.2
com.apple.driver.AppleMCCSControl    1.0.33
com.apple.driver.AppleLPC    1.6.0
com.apple.driver.AGPM    100.12.75
com.apple.iokit.IOUserEthernet    1.0.0d1
com.apple.Dont_Steal_Mac_OS_X    7.0.0
com.apple.driver.AudioIPCDriver    1.2.3
com.apple.driver.ApplePolicyControl    3.1.33
com.apple.GeForce    7.3.2
com.apple.driver.ACPI_SMC_PlatformPlugin    5.0.0d8
com.apple.driver.BroadcomUSBBluetoothHCIController    4.0.8f17
com.apple.driver.AppleUSBCardReader    3.0.6
com.apple.driver.AppleIRController    312
com.apple.AppleFSCompression.AppleFSCompressionTypeDataless    1.0.0d1
com.apple.AppleFSCompression.AppleFSCompressionTypeZlib    1.0.0d1
com.apple.BootCache    33
com.apple.iokit.SCSITaskUserClient    3.2.1
com.apple.iokit.IOAHCISerialATAPI    2.0.3
com.apple.driver.XsanFilter    404
com.apple.iokit.IOAHCIBlockStorage    2.1.0
com.apple.driver.AppleRTC    1.5
com.apple.driver.AppleFWOHCI    4.9.0
com.apple.driver.AirPort.Atheros40    505.67.1
com.apple.driver.AppleAHCIPort    2.3.1
com.apple.nvenet    2.0.17
com.apple.driver.AppleUSBHub    5.1.0
com.apple.driver.AppleUSBEHCI    5.1.0
com.apple.driver.AppleUSBOHCI    5.1.0
com.apple.driver.AppleEFINVRAM    1.6.1
com.apple.driver.AppleHPET    1.7
com.apple.driver.AppleACPIButtons    1.5
com.apple.driver.AppleSMBIOS    1.9
com.apple.driver.AppleACPIEC    1.5
com.apple.driver.AppleAPIC    1.6
com.apple.driver.AppleIntelCPUPowerManagementClient    195.0.0
com.apple.nke.applicationfirewall    3.2.30
com.apple.security.quarantine    1.4
com.apple.security.TMSafetyNet    8
com.apple.driver.AppleIntelCPUPowerManagement    195.0.0
com.apple.driver.AppleMultitouchDriver    231.4
com.apple.driver.IOBluetoothHIDDriver    4.0.8f17
com.apple.kext.triggers    1.0
com.apple.iokit.IOSerialFamily    10.0.5
com.apple.driver.DspFuncLib    2.2.5a5
com.apple.driver.AppleBacklightExpert    1.0.4
com.apple.driver.AppleSMBusController    1.0.10d0
com.apple.driver.AppleSMBusPCI    1.0.10d0
com.apple.iokit.IOSurface    80.0.2
com.apple.iokit.IOAudioFamily    1.8.6fc18
com.apple.kext.OSvKernDSPLib    1.3
com.apple.driver.AppleGraphicsControl    3.1.33
com.apple.driver.AppleHDAController    2.2.5a5
com.apple.iokit.IOHDAFamily    2.2.5a5
com.apple.nvidia.nv50hal    7.3.2
com.apple.NVDAResman    7.3.2
com.apple.iokit.IONDRVSupport    2.3.4
com.apple.iokit.IOGraphicsFamily    2.3.4
com.apple.iokit.IOFireWireIP    2.2.5
com.apple.driver.IOPlatformPluginLegacy    5.0.0d8
com.apple.driver.IOPlatformPluginFamily    5.1.1d6
com.apple.driver.AppleSMC    3.1.3d10
com.apple.driver.AppleUSBBluetoothHCIController    4.0.8f17
com.apple.iokit.IOBluetoothFamily    4.0.8f17
com.apple.iokit.IOSCSIBlockCommandsDevice    3.2.1
com.apple.iokit.IOUSBMassStorageClass    3.0.3
com.apple.iokit.IOUSBHIDDriver    5.0.0
com.apple.driver.AppleUSBMergeNub    5.1.0
com.apple.driver.AppleUSBComposite    5.0.0
com.apple.iokit.IOSCSIMultimediaCommandsDevice    3.2.1
com.apple.iokit.IOBDStorageFamily    1.7
com.apple.iokit.IODVDStorageFamily    1.7.1
com.apple.iokit.IOCDStorageFamily    1.7.1
com.apple.iokit.IOSCSIArchitectureModelFamily    3.2.1
com.apple.iokit.IOFireWireFamily    4.4.8
com.apple.iokit.IO80211Family    420.3
com.apple.iokit.IOAHCIFamily    2.0.8
com.apple.iokit.IONetworkingFamily    2.1
com.apple.iokit.IOUSBUserClient    5.0.0
com.apple.iokit.IOUSBFamily    5.1.0
com.apple.driver.NVSMU    2.2.9
com.apple.iokit.IOHIDFamily    1.7.1
com.apple.driver.AppleEFIRuntime    1.6.1
com.apple.iokit.IOSMBusFamily    1.1
com.apple.security.sandbox    177.11
com.apple.kext.AppleMatch    1.0.0d1
com.apple.driver.DiskImages    331.7
com.apple.iokit.IOStorageFamily    1.7.2
com.apple.driver.AppleKeyStore    28.18
com.apple.driver.AppleACPIPlatform    1.5
com.apple.iokit.IOPCIFamily    2.7
com.apple.iokit.IOACPIFamily    1.4
System Profile:
Model: iMac10,1, BootROM IM101.00CC.B00, 2 processors, Intel Core 2 Duo, 3.06 GHz, 4 GB, SMC 1.52f9
Graphics: NVIDIA GeForce 9400, NVIDIA GeForce 9400, PCI, 256 MB
Memory Module: BANK 0/DIMM1, 2 GB, DDR3, 1067 MHz, 0x80CE, 0x4D34373142353637334548312D4346382020
Memory Module: BANK 1/DIMM1, 2 GB, DDR3, 1067 MHz, 0x80CE, 0x4D34373142353637334548312D4346382020
AirPort: spairport_wireless_card_type_airport_extreme (0x168C, 0x8F), Atheros 9280: 4.0.67.5-P2P
Bluetooth: Version 4.0.8f17, 2 service, 18 devices, 1 incoming serial ports
Serial ATA Device: ST3500418ASQ, 500.11 GB
Serial ATA Device: HL-DT-ST DVDRW GA11N
USB Device: Built-in iSight, apple_vendor_id, 0x8502, 0x24400000 / 2
USB Device: Internal Memory Card Reader, apple_vendor_id, 0x8403, 0x26500000 / 3
USB Device: USB2.0 Hub, 0x05e3 (Genesys Logic, Inc.), 0x0608, 0x26200000 / 2
USB Device: IR Receiver, apple_vendor_id, 0x8242, 0x04500000 / 2
USB Device: Hub in Apple Extended USB Keyboard, apple_vendor_id, 0x1003, 0x06400000 / 3
USB Device: Apple Extended USB Keyboard, apple_vendor_id, 0x020b, 0x06430000 / 4
USB Device: BRCM2046 Hub, 0x0a5c (Broadcom Corp.), 0x4500, 0x06100000 / 2
USB Device: Bluetooth USB Host Controller, apple_vendor_id, 0x8215, 0x06110000 / 6

Why does my mac reboot on its own?

Why does my mac reboot on its own?

Oh den.thed... I saw your post this morning and I was so excited.... ran to the Mac and got to Energy Saver, and... the checkbox is already unchecked.
Long story, I'll make it short. Just got the Mac back after having the HDD replaced. (It stopped working after less than 500 hours.) This rebooting thing has been happening ever since I got the computer in 2010, and I was hoping it would coincidentally stop happening after having this crashed HDD replaced last week. No such luck. Still doing it, even after getting the computer back from Apple. Two of my kids have macbooks, have used the cr*p out of them, and have had very few problems (nothing big). I bought this Mac, to replace a dead Dell desktop that got very little use, and so far I am not sure I did the right thing. Really wish I could get this "automatic" rebooting thing fixed. (Reboots with no notice, while doing normal tasks - internet, word docs, etc.) Thanks again for your help. Let me know if I should try anything else.

Why does my Mac Book pro keep restarting

why does my Mac Book pro keep restarting and how can it be fixed

It would be nice if you could include a kernel panic log to verify that your problem is...
Mid-2010 15" MacBook Pros - the bad NVIDIA GPU
If you're having frequent kernel panics with your 15" mid-2010, or intermittent screen problems, the problem is, more than likely, the faulty NVIDIA GPU found in a number of those machines.
Here's just a sample of a kernel panic log that points to the faulty NVIDIA card:
Kernel Extensions in backtrace (with dependencies):
         com.apple.GeForce(6.4.0)@0x82ac4000->0x82b7afff
            dependency: com.apple.NVDAResman(6.4.0)@0x834a0000
            dependency: com.apple.iokit.IONDRVSupport(2.2.1)@0x82fd3000
            dependency: com.apple.iokit.IOPCIFamily(2.6.5)@0x7a802000
            dependency: com.apple.iokit.IOGraphicsFamily(2.2.1)@0x8301b000
         com.apple.nvidia.nv50hal(6.4.0)@0x83c05000->0x84019fff
            dependency: com.apple.NVDAResman(6.4.0)@0x834a0000
         com.apple.NVDAResman(6.4.0)@0x834a0000->0x8378dfff
            dependency: com.apple.iokit.IOPCIFamily(2.6.5)@0x7a802000
            dependency: com.apple.iokit.IONDRVSupport(2.2.1)@0x82fd3000
            dependency: com.apple.iokit.IOGraphicsFamily(2.2.1)@0x8301b000
Here's the "official" Apple take on the issue - but the very real kernel panics need not be preceded by 'Intermittent black screen or loss of video'... in fact, you might not experience any video problems at all. Although video problems can certainly be a portent of things to come…
So what can you do? Print out a copy of your kernel panic and a copy of the Knowledge Base article and take them, along with your machine, to your local Apple Store or an Apple Authorized Service Provider. The unfortunate thing is that many people have passed the “three years from date of purchase” now and Apple is not honoring the free logic board replacement for many users. Some dealers seem to be making some exceptions for those past the three year mark, but don’t count on it…
Good luck,
Clinton

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