Mac mini keeps shutting down for no reason

My mac mini keeps shutting down for no reason. If I try to turn it on right after it shuts down, it won't or I may hear a chine, power light lit up for about 5 seconds and turns off. I have to wait a while before it would turn on again. And sometimes it stays on for 15 min, 2 hrs or 1 full night ... but then the cycle happens again.

Make sure the power cord is attached firmly to the back of the Mini. If so, try a clean install of Snow Leopard (or whatever version of OS X it came with). If neither of those suggestions works, it's likely a bad power supply, in which case you'll need to take it to an Apple store or call Apple support.

Similar Messages

My Mac keeps shutting down for no reason

My Mac keeps shutting down for no reason

We have no way of see your Mac so you are going to have to tell us
exactly what model of MacBook Pro you have
disk space
amount of RAM
what operating system are you running
any error message you might be seeing
Allan

My Macbook Pro keeps shutting down for no reason

I have this Macbook Pro 15' , 4gb ram, 500gb HD, and it was pretty slow, so i took it to an apple shop where they've format and installed Mountain Lion 10.8.3, but now after a week it keeps shuting down for no reason, it happens when im using for example, safari and Word or 2 softwares at the same time, any tips?
They've checked the Hard disk at the shop and everything was all right.

Nathan Macbeth wrote:
... any tips?
Increase your RAM to at least 8 GB... if you can.
You can use this Link to check which RAM is suitable for your Mac...
http://eshop.macsales.com/shop/apple/memory/
It is Important to get the Correct and Matching RAM
That site also has videos on how to Install RAM should you need it...
Basically... Make sure you have enough Free Hard Drive space for your Mac to Perform as expected...
This is what Apple has to say.
http://support.apple.com/kb/PH10798
More Info Here...
ds store > Why is my computer slow?
Thomas A Reed > http://www.thesafemac.com/mpg/

Firefox keeps shutting down for no reason!

Firefox keeps shutting down for now apparent reason. I'm typing away and boom, it's just gone! I've lost everything I've typed and have to start all over again!
No errors, no new software, the computer sits on a cooling fan and it hasn't run out of memory!
Am I missing an update? Though I'm NOT really thrilled with the fact that I can NOT choose my own home page! It defaults to the Firefox home page no matter what I put in as my home page in SETUP!
But that's yet another issue!
Please help me with this!
Sincerely,
Rodney

Hi Rodney, since your More System Details shows that you have MySearchDial, I suggest starting with a little malware cleanup.
Open the Windows Control Panel, Uninstall a Program, and click the "Installed on" column heading to group the items by date. This should help identify how MySearchDial got installed, probably as an undisclosed part of a bundle, and better let you zero in on unwanted software that may be tampering with your Firefox settings. Take out as much trash as you can here.
You may also want to supplement your regular security software with some of the scanners in our support article: [[Troubleshoot Firefox issues caused by malware]].

Brand New Pavilion DV7 Shut down twice when first started, and keeps shutting down for no reason

The problem I have with my new HP Dv7 is it keeps shutting down. This can't be due to over heating as when I first switched it on and went through the setup process it restarted twice. Took me three attempts to get just past the registration section.
Reading on the forum pages it looks like quite a few people have had the same problem. Is there a software fix/update to solve this problem? or do I have a faulty laptop?
Thanks
Marc

Please identify your notebook/pc with more than the series number. Look at the base/rear/side of the notebook/pc at the barcoded sticker. Post items numbered 1 and 2 on the following image.
Post the installed operating system version ( and whether it is 32 or 64-bit)
Best regards,
erico
****Please click on Accept As Solution if a suggestion solves your problem. It helps others facing the same problem to find a solution easily****
2015 Microsoft MVP - Windows Experience Consumer

Nokia x6 keeps shutting down for no reason, amongs...

Hope some one can help.
My nokia x6 will turn its self of for no reason normally though after sending a message, battery is full charged.
also I get the problem with the camera sometimes it goes to a black screen. I have to turn it off to get it to work. As mentioned before some pics you just don't get the chance to take a 2nd time.
also with regards to the camera the button on the side of the will no longer taking pics you have to use the onscreen touch button.
also the text when writing a message will want to delete its self whilst typing.
OK the camera and the text problem aside, the phone keep shutting its self down is a major problem as IM the carer for my very ill wife. If the phone shuts down and I miss a call it could be to late for my wife receiving medical attention if IM at work and she can't get in contact with me.

you should send your device to a nokia care point for inspection
If i have helped at all a click on the white star below would be nice thanks.
Now using the Lumia 1520

Why does my mac mini keep shutting down?

My mac mini is 4 years old and just keeps turning off, on its own and with no warning. Any suggestions? please????

Intel-based Macs: Resetting the System Management Controller (SMC)

I have a gen one iPad and Safari keeps shutting down for no reason Just crashes. Is this common?

I had my original Ipad replaced because of this but it still occurs and is getting more frequent as time progresses.
Has anyone else had this problem and can you suggest a fix. My I pad is not old enough not to be working properly.

You tagline shows iOS 6.0.1, but you said you have the first generation iPad. iOS 6 does not run on the iPad 1, so I assume that you're running 5.1.1.
You may have low memory issues with the iPad which some users have talked about with the original iPad running iOS 5. You can try some basic troubleshooting steps and see if they help. You might want to see if the iPad and Safari behave better when you keep apps in the recents tray to a minimum....close the apps if don't need quick access to them.
Anyway, give these things a shot.
Quit all apps completely and restart the iPad. Go to the home screen first by tapping the home button. Double tap the home button and the task bar will appear with all of your recent/open apps displayed at the bottom. Tap and hold down on any app icon until it begins to wiggle. Tap the minus sign in the upper left corner of the app that you want to close. Tap the home button or anywhere above the task bar.
Go to Settings>Safari>Clear History, Cookies and Cache. Reboot the iPad.
Reboot the iPad by holding down on the sleep and home buttons at the same time for about 10-15 seconds until the Apple Logo appears - ignore the red slider - let go of the buttons.

Safari keeps shutting down for no reason

Its not just happened recently its been happening for a few months. I'm a bit lax at knowing when I update software etc but I usually do it relatively regularly and it has been happening a while. Rang Apple and they took me through finding these files to put in trash which I did but the problem is no better.
Not very technical as to what I am using I have a 13 inch MacBook Pro, using 10.6 Snow Leopard and Safari version 5.0.4. Sometimes its fine for a day or two, other times I can be using Safari and it just slows down and randomly closes. Then a minute later I get the screen saying there was an error with Safari do I want to reopen etc, and it takes a good 30-40 seconds to load an internet page.
Its getting quite frustrating because when I'm accessing loads of journals for work and it crashes I lose the exact point I was up to etc. It happens sometimes when I'm just using one page other times when I have loads of tabs, seems to be no pattern to it.
Any help would be greatly appreciated!

Rats posted in the wrong section. Sod's law!

Invader game, after I got charged for buying things that help on the game. Now the app is not working! It keeps shutting down for no reason every time I try to open the app! What to do?

what can I do for apps that are no longer want to work while other stel using it just fine?

Yes....always a good idea to say what you've already tried! Have you actually tried what I suggested though? If that doesn't work, the only other suggestions are deleting the game and reinstalling, or contacting the game developer.

My iPad shuts down for no reason, mine is wifi only, what to do?

My iPad shuts down for no reason, in the middle of doing something. Mine is wifi only, what can I do?

My iPad Air version 8.2 shuts down for no reason and then will only restart if it connected to power. When It restarts after I have connected it to power, the battery shows that it is dead and the clock displays 4 pm. Then the iPad reboots and the clock displays the correct time and the battery display shows the correct charge. The iPad is updated and works normally except for its spontaneous shutdown behavior.
My solution for the time being is to connect it to a portable external battery when I am away from a power source.

Imove shuts down for no reason while i'm working on my project. why could this be happening?

Imove states my project is out of date, and also shuts down for no reason while i'm working on my project why is this and what can i do to fix this please help!! working on a gift for my cousins wedding.

ok Rebis i think this appears to fix your problem , not sure though.. they say just to reinstall mac os X , back up your stuff and format the drive, reinstall the os. In my case , it just reboots by itself , no grey screen , nothing, keeps rebooting and rebooting sometimes. Ran apple hardware test, sry dont remember error # , but it said video controller error.
I hope Taylor posts again to see if his got fixed, cause it seems his problem and mine are really alike if not the same.
Message was edited by: Tonyrvv
spelling errors lol

Maverick Shuts Down For No Reason

I am tired of Maverick shutting down for no reason. It even does it in Safe Mode. I've tried all the tricks of removing preferences, extension and still it keep shutting down with it's kernel panic screen. I'm the one that's paniced. I can't work in any program, such as Final Cut or Safari for too long as it will shut down. I'm thinking I need to reformat. Great. My least favorite option. But, I need to get all my files off, deauthorize software and hoping that I can get my mail and other contact back.
Hoping someone might have an answer to avoid reformating.
I keep sending in these reports to APPLE, 3 to 8 a day. Here is the most recent one.....Hopefully, I can post this before my computer decides to reboot.
Lastly:
Model Name:          MacBook Pro
Model Identifier:          MacBookPro8,2
Processor Name:          Intel Core i7
Processor Speed:          2.5 GHz
Number of Processors:          1
Total Number of Cores:          4
L2 Cache (per Core):          256 KB
L3 Cache:          8 MB
Memory:          16 GB
Boot ROM Version:          MBP81.0047.B27
SMC Version (system):          1.69f4
Serial Number (system):          C02HJ2DVDV7P
Hardware UUID:          245EB5DE-6395-50FF-80F0-37C23291CDAE
Sudden Motion Sensor:
State:          Enabled
Anonymous UUID:       D39D2DB0-F295-781C-7F15-8878225545B1
Wed Dec 18 11:51:32 2013
panic(cpu 0 caller 0xffffff800f0dc19e): Kernel trap at 0xffffff800f0a3af0, type 13=general protection, registers:
CR0: 0x000000008001003b, CR2: 0x000000010b756000, CR3: 0x00000001acc90092, CR4: 0x00000000000606e0
RAX: 0xffffff800f6d0320, RBX: 0x0000000000000032, RCX: 0x0000000000000032, RDX: 0x001b61b100400000
RSP: 0xffffff81e08abd30, RBP: 0xffffff81e08abd50, RSI: 0xffffff801a4106a8, RDI: 0xffffff800f6d0640
R8: 0xffffff801a33ce70, R9: 0xffffff801a378ca8, R10: 0xd000c8b0a4f08627, R11: 0x0000000000000206
R12: 0xffffff8015b0f210, R13: 0xffffff8031a50760, R14: 0x000000000000014d, R15: 0xffffff801a378ca8
RFL: 0x0000000000010282, RIP: 0xffffff800f0a3af0, CS: 0x0000000000000008, SS: 0x0000000000000000
Fault CR2: 0x000000010b756000, Error code: 0x0000000000000000, Fault CPU: 0x0
Backtrace (CPU 0), Frame : Return Address
0xffffff81d05e7c50 : 0xffffff800f022f69
0xffffff81d05e7cd0 : 0xffffff800f0dc19e
0xffffff81d05e7ea0 : 0xffffff800f0f3606
0xffffff81d05e7ec0 : 0xffffff800f0a3af0
0xffffff81e08abd50 : 0xffffff800f078289
0xffffff81e08abf20 : 0xffffff800f0dc5dc
0xffffff81e08abfb0 : 0xffffff800f0f350b
BSD process name corresponding to current thread: assistantd
Mac OS version:
13B42
Kernel version:
Darwin Kernel Version 13.0.0: Thu Sep 19 22:22:27 PDT 2013; root:xnu-2422.1.72~6/RELEASE_X86_64
Kernel UUID: 1D9369E3-D0A5-31B6-8D16-BFFBBB390393
Kernel slide:     0x000000000ee00000
Kernel text base: 0xffffff800f000000
System model name: MacBookPro8,2 (Mac-94245A3940C91C80)
System uptime in nanoseconds: 217351646812
last loaded kext at 117697819324: com.apple.driver.AppleHWSensor          1.9.5d0 (addr 0xffffff7f90aac000, size 36864)
loaded kexts:
com.sophos.kext.sav          8.0.14
com.drobo.SCSI.ThunderBolt          1.1 [64171]
com.attotech.driver.ATTOiSCSI          3.4.1b1
com.AmbrosiaSW.AudioSupport          4.1.2
com.TrustedData.driver.VendorSpecificType00          1.7.0
at.obdev.nke.LittleSnitch          4052
com.apple.driver.AppleHWSensor          1.9.5d0
com.apple.driver.AudioAUUC          1.60
com.apple.driver.AppleTyMCEDriver          1.0.2d2
com.apple.driver.AGPM          100.14.11
com.apple.filesystems.autofs          3.0
com.apple.iokit.IOBluetoothSerialManager          4.2.0f6
com.apple.driver.AppleMikeyHIDDriver          124
com.apple.driver.AppleHDAHardwareConfigDriver          2.5.3fc1
com.apple.driver.AppleHDA          2.5.3fc1
com.apple.iokit.IOUserEthernet          1.0.0d1
com.apple.driver.AppleMikeyDriver          2.5.3fc1
com.apple.Dont_Steal_Mac_OS_X          7.0.0
com.apple.kext.AMDFramebuffer          1.1.4
com.apple.driver.AppleBacklight          170.3.5
com.apple.driver.AppleUpstreamUserClient          3.5.13
com.apple.driver.AppleHWAccess          1
com.apple.iokit.IOBluetoothUSBDFU          4.2.0f6
com.apple.driver.AppleMCCSControl          1.1.12
com.apple.driver.ApplePolicyControl          3.4.12
com.apple.driver.AppleMuxControl          3.4.12
com.apple.driver.ACPI_SMC_PlatformPlugin          1.0.0
com.apple.iokit.BroadcomBluetoothHostControllerUSBTransport          4.2.0f6
com.apple.driver.SMCMotionSensor          3.0.4d1
com.apple.driver.AppleSMCPDRC          1.0.0
com.apple.driver.AppleSMCLMU          2.0.4d1
com.apple.AMDRadeonX3000          1.1.4
com.apple.kext.AMD6000Controller          1.1.4
com.apple.driver.AppleIntelHD3000Graphics          8.1.8
com.apple.driver.AppleIntelSNBGraphicsFB          8.1.8
com.apple.driver.AppleLPC          1.7.0
com.apple.driver.AppleThunderboltIP          1.0.10
com.apple.driver.AppleUSBTCButtons          240.2
com.apple.driver.AppleUSBTCKeyEventDriver          240.2
com.apple.driver.AppleUSBTCKeyboard          240.2
com.apple.driver.AppleFireWireStorage          3.3.5
com.apple.driver.initioFWBridge          3.3.5
com.apple.driver.IOFireWireSerialBusProtocolSansPhysicalUnit          3.3.5
com.apple.driver.LSI_FW_500          3.3.5
com.apple.driver.Oxford_Semi          3.3.5
com.apple.driver.StorageLynx          3.3.5
com.apple.driver.AppleIRController          325.7
com.apple.driver.AppleFileSystemDriver          3.0.1
com.apple.AppleFSCompression.AppleFSCompressionTypeDataless          1.0.0d1
com.apple.AppleFSCompression.AppleFSCompressionTypeZlib          1.0.0d1
com.apple.BootCache          35
com.apple.iokit.SCSITaskUserClient          3.6.0
com.apple.driver.XsanFilter          404
com.apple.iokit.IOAHCIBlockStorage          2.4.0
com.apple.driver.AppleUSBHub          650.4.4
com.apple.iokit.AppleBCM5701Ethernet          3.6.9b9
com.apple.driver.AppleSDXC          1.4.0
com.apple.driver.AirPort.Brcm4331          700.20.22
com.apple.driver.AppleFWOHCI          4.9.9
com.apple.driver.AppleAHCIPort          2.9.5
com.apple.driver.AppleUSBEHCI          650.4.1
com.apple.driver.AppleUSBUHCI          650.4.0
com.apple.driver.AppleSmartBatteryManager          161.0.0
com.apple.driver.AppleACPIButtons          2.0
com.apple.driver.AppleRTC          2.0
com.apple.driver.AppleHPET          1.8
com.apple.driver.AppleSMBIOS          2.0
com.apple.driver.AppleACPIEC          2.0
com.apple.driver.AppleAPIC          1.7
com.apple.driver.AppleIntelCPUPowerManagementClient          216.0.0
com.apple.nke.applicationfirewall          153
com.apple.security.quarantine          3
com.apple.driver.AppleIntelCPUPowerManagement          216.0.0
com.apple.driver.AppleBluetoothHIDKeyboard          170.15
com.apple.driver.IOBluetoothHIDDriver          4.2.0f6
com.apple.driver.AppleHIDKeyboard          170.15
com.apple.iokit.IOSCSIParallelFamily          3.0.0
com.apple.kext.triggers          1.0
com.apple.iokit.IOSerialFamily          10.0.7
com.apple.driver.DspFuncLib          2.5.3fc1
com.apple.vecLib.kext          1.0.0
com.apple.iokit.IOSurface          91
com.apple.iokit.IOBluetoothFamily          4.2.0f6
com.apple.driver.AppleSMBusPCI          1.0.12d1
com.apple.driver.AppleSMBusController          1.0.11d1
com.apple.driver.AppleBacklightExpert          1.0.4
com.apple.driver.AppleGraphicsControl          3.4.12
com.apple.iokit.IOAudioFamily          1.9.4fc11
com.apple.kext.OSvKernDSPLib          1.14
com.apple.driver.IOPlatformPluginLegacy          1.0.0
com.apple.driver.AppleHDAController          2.5.3fc1
com.apple.iokit.IOHDAFamily          2.5.3fc1
com.apple.iokit.IOBluetoothHostControllerUSBTransport          4.2.0f6
com.apple.iokit.IOFireWireIP          2.2.5
com.apple.driver.AppleSMC          3.1.6d1
com.apple.iokit.IOAcceleratorFamily          98.7.1
com.apple.kext.AMDSupport          1.1.4
com.apple.AppleGraphicsDeviceControl          3.4.12
com.apple.iokit.IONDRVSupport          2.3.6
com.apple.iokit.IOGraphicsFamily          2.3.6
com.apple.driver.IOPlatformPluginFamily          5.5.1d27
com.apple.driver.AppleThunderboltEDMSink          1.2.1
com.apple.iokit.IOUSBMassStorageClass          3.6.0
com.apple.driver.AppleUSBMultitouch          240.6
com.apple.driver.AppleThunderboltDPOutAdapter          2.5.0
com.apple.driver.AppleThunderboltDPInAdapter          2.5.0
com.apple.driver.AppleThunderboltDPAdapterFamily          2.5.0
com.apple.driver.AppleThunderboltPCIUpAdapter          1.4.0
com.apple.driver.AppleThunderboltPCIDownAdapter          1.4.0
com.apple.iokit.IOSCSIBlockCommandsDevice          3.6.0
com.apple.iokit.IOSCSIReducedBlockCommandsDevice          3.6.0
com.apple.iokit.IOFireWireSerialBusProtocolTransport          2.5.1
com.apple.iokit.IOFireWireSBP2          4.2.5
com.apple.iokit.IOUSBHIDDriver          650.4.4
com.apple.driver.AppleUSBMergeNub          650.4.0
com.apple.driver.AppleUSBComposite          650.4.0
com.apple.iokit.IOSCSIMultimediaCommandsDevice          3.6.0
com.apple.iokit.IOBDStorageFamily          1.7
com.apple.iokit.IODVDStorageFamily          1.7.1
com.apple.iokit.IOCDStorageFamily          1.7.1
com.apple.iokit.IOAHCISerialATAPI          2.6.0
com.apple.iokit.IOSCSIArchitectureModelFamily          3.6.0
com.apple.driver.AppleThunderboltNHI          1.9.2
com.apple.iokit.IOThunderboltFamily          2.8.5
com.apple.iokit.IOUSBUserClient          650.4.4
com.apple.iokit.IOEthernetAVBController          1.0.3b3
com.apple.driver.mDNSOffloadUserClient          1.0.1b4
com.apple.iokit.IO80211Family          600.34
com.apple.iokit.IONetworkingFamily          3.2
com.apple.iokit.IOFireWireFamily          4.5.5
com.apple.iokit.IOAHCIFamily          2.6.0
com.apple.iokit.IOUSBFamily          650.4.4
com.apple.driver.AppleEFINVRAM          2.0
com.apple.driver.AppleEFIRuntime          2.0
com.apple.iokit.IOHIDFamily          2.0.0
com.apple.iokit.IOSMBusFamily          1.1
com.apple.security.sandbox          278.10
com.apple.kext.AppleMatch          1.0.0d1
com.apple.security.TMSafetyNet          7
com.apple.driver.AppleKeyStore          2
com.apple.driver.DiskImages          371.1
com.apple.iokit.IOStorageFamily          1.9
com.apple.iokit.IOReportFamily          21
com.apple.driver.AppleFDEKeyStore          28.30
com.apple.driver.AppleACPIPlatform          2.0
com.apple.iokit.IOPCIFamily          2.8
com.apple.iokit.IOACPIFamily          1.4
com.apple.kec.pthread          1
com.apple.kec.corecrypto          1.0

marcocapela wrote:
I perform a lot of hard reset
There is no such thing as a "hard reset".
If basic troubleshooting from the User's Guide fails to resolve the issue, then take the device to Apple for evaluation and possible replacement.
marcocapela wrote:
It worked very good for 2 years, i lost warranty, and i'm with this problem for 2 months and it's very annoying, and i'm losing faith in apple products...
Warranties expire, hardware eventually fails, ignorant people live with issues for long periods of time and the above statement is simply ignorant.

IMac 27'' keeps powering down for no reason

After about 2 hrs of editing sometimes my iMac 27'' keeps powering down for no reason and then rebooting.

If you have more than one user account, these instructions must be carried out as an administrator.
Launch the Console application in any of the following ways:
☞ Enter the first few letters of its name into a Spotlight search. Select it in the results (it should be at the top.)
☞ In the Finder, select Go ▹ Utilities from the menu bar, or press the key combination shift-command-U. The application is in the folder that opens.
☞ Open LaunchPad. Click Utilities, then Console in the icon grid.
Step 1
Make sure the title of the Console window is All Messages. If it isn't, select All Messages from the SYSTEM LOG QUERIES menu on the left. If you don't see that menu, select
View ▹ Show Log List
from the menu bar.
Enter "BOOT_TIME" (without the quotes) in the search box. Note the timestamps of those log messages, which refer to the times when the system was booted. Now clear the search box and scroll back in the log to the last boot time after you had the problem. Select the messages logged before the boot, while the system was unresponsive or was failing to shut down. Copy them to the Clipboard (command-C). Paste into a reply to this message (command-V). Please include the BOOT_TIME message at the end of the log extract.
If there are runs of repeated messages, post only one example of each. Don’t post many repetitions of the same message.
When posting a log extract, be selective. In most cases, a few dozen lines are more than enough.
Please do not indiscriminately dump thousands of lines from the log into this discussion.
Important: Some private information, such as your name, may appear in the log. Anonymize before posting.
Step 2
Still in Console, look under System Diagnostic Reports for crash or panic logs, and post the entire contents of the most recent one, if any. In the interest of privacy, I suggest you edit out the “Anonymous UUID,” a long string of letters, numbers, and dashes in the header of the report, if present (it may not be.) Please don’t post shutdownStall, spin, or hang logs — they're very long and not helpful.

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.

Mac mini keeps shutting down for no reason

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