Mac Mini Doesn't boot up unless I unplug and replug

If I shut down my Mac Mini it will not start up again unless I unplug the machine and plug it back in. I have a hub attached, which has a light that stays on, so I know its still receiving power. Any thoughts?

In addition to what DaddyPaycheck said .... What does your Mini report in the window that opens if you do
Apple menu > About this Mac? (It's helpful to know more about your Mini's specs.)
(My personal experience has been that the problem you describe always comes down to an issue with a USB cable or device.)

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Mac mini doesn't boot

Hi,
My 2009 Mac mini doesn't boot anymore : all I get is a blank screen, I can't even chose to boot on the restoration drive.
From your experience, what do you think it could be linked with ? motherboard ? RAM ? It doesn't looke like a hard drive issue.
Thanks
Benoît

Hello! I'm having, what sounds like, the same issue. Everything was working fine, until I ran a combined update, as prompted, for 10.8.2. After the normal reboot, the computer boots to a plain, white screen with no Apple. The computer is not responding to any keyboard command at startup, be it any of the reset commands, 'C' to boot to the optical drive, or option to select the startup destination. When pressing the Caps/Num lock keys, I notice that none of the LED lights will turn on on the keyboard. The piggybacked optical mouse is not showing it's red light from the bottom either. These tested fine on my MacBook Pro, however, and have always worked with the Mac Mini. Connecting and reconnecting the devices does not help. I know how to run all of the hard disk repairs, the permission fixes, etc., but it appears as though something is stopping my USB devices from being utilized (or even powered) at startup. I work in IT, and I support Apple computers every day (point being, I do know my stuff).
I opened the case and disconnected the hard drive from the logic board, thinking a potential hard disk issue is to blame. Upon restart, I still get the BONG (chime), but the machine will still not respond to any keyboard commands. Plugging in a USB stick that was created as a Mountain Lion boot device in Disk Utility with the InstallESD.dmg doesn't yield any results (as I am unable to 'tell' the computer to boot from it). The system disc that was packaged with the Mini is in the optical drive, but the Mini won't boot to that either. I'm at a complete loss. This is a 2010 model which was purchased new in December in that year. I'm using HDMI directly to an HDTV. The cable is working, the TV is working, the optical drive works in another machine, and the hard disc makes the necessary sounds (but not anything out of the ordinary).
To reiterate, this happened IMMEDIATELY after installing the combined 10.8.2 update. I am seeing a lot of posts about this issue, but no actual solutions. The dialogue seems to die somewhere after, "Reset the PRAM."
PLEASE ADVISE

I am using a USB keyboard and everytime I wake the iMac from sleep the keyboard will not respond unless I unplug and replug the keyboard. I am using a mid-2010 iMac with OSX 10.6. Any help would be appreciated.

I am currently using a USB keyboard (PC Model) and everytime I wake the computer from sleep the keyboard no longer responds unless I unplug and replug it. The USB mouse I am using works fine with no issues and I have already gone through the prompt to identify the keyboard in the settings. If anyone know of a setting I can use to permenantly enable the keyboard so I no longer have to unplug and replug it that would be appreciated.
Thank you.

Your 2010 MBP would be able to handle Yosemite, but I would strongly suggest that you get the current problem sorted out before trying to upgrade to Yosemite. I'd also recommend another backup that isn't created by Time Machine if you are thinking of upgrading. SuperDuper and CarbonCopyCloner can make bootable clones of hard drives. If you clone your existing system to a fresh external drive, you would be able to boot from that drive and recover quickly in the event that your Yosemite upgrade didn't work out. Time Machine backups are not 100% reliable.
It's possible that, if your internal HD is the one that shipped with your MBP in 2010, it may be failing. If it keeps needing repairs, that is probably a sign that it is approaching the end of its useful life.
Have you run Disk Utility's Repair tool on the external drive as well?
I mentioned the hub because some people have reported here that attaching their USB 3 drives through a USB 2 hub solved some disconnection problems. A good-quality powered USB 2 hub won't cost much.
My most recent brush with random disconnections involved a nice new OWC drive enclosure. I used the cable that came with the drive, but the drive kept disconnecting. Using a different cable solved the problem. You wouldn't expect that what appeared to be a high quality cable would be a problem straight out of the box, but it was.

Mac mini doesn't booting

I got a problem with my late 2012 mac mini ( intel core i5 processor, 500GB HDD). I was playing "Call of Duty" when it stopped working(freezed). I tried to press any button on the keyboard but nothing happened. Then I shutted it down by pressing power button. But when I press the power button once again, my mac mini failed to boot. The indicator light is on but there isn't boot sound and the screen is blank either. I tried to restart several times but its still didnt boot. Anyone here can help me? thanks.

Troubleshooting: My computer won't turn on

External hard drive read only unless you unplug and replug in

I've got an external firewire hd (fw 400 with an adapter) connected to a MacBook Pro 2009 running OS X 10.6.2. It's been working flawlessly until recently. I'm not sure what happened and I don't think it's the result of any system upgrade or modification, but now, at startup, the drive shows up as read-only. But, if I eject, unplug, and replug it in, or eject, turn if off, and back on, it mounts correctly as read/write. Get Info on the drive shows that it should be read/write. I've tried repairing permissions and doing a repair disk from Disk Utility, but no problems are found.
Any idea on what the problem/solution is?

I'm not sure where the issue is but you do you do have it running. One thing you can do to see if it's the computer or the drive is to get another FW drive and connect it and see if it works. If the Mac automatically detects it (like it should!) then that tells you it something with the original drive and if it doesn't then it's obviously something with the MBP. If you take it to an Apple Store and explain the issue they can probably provide another drive to test it out.
If it turns out to be the drive (that's my guess) then it might be a power supply problem or the FW connection, a hunch tells me it would be the power supply.
At least you are finally making progress and can use the drive though!

My apple tv worked fine till i got new Panasonic 55 plasma. now the tv doesnt recognized the hdmi unless i unplug and replug the apple tv.

my gen 2 apple tv worked fine on my 5 yo Panasonic Viera with HDMI cable.
i bought new 55 inch Panasonic and new hdmi cables.
the apple tv works fine but...if i turn off the tv and leave it off for a while, then try to watch apple tv, the apple tv is off and no signal seen at the tv
if i unplug and replug the apple tv it reboots and works fine on the tv
i tried with three diff hdmi cables and three diff ports on the tv.. all same problem
help

After successfully logging onto your network, your tv screen should display a 5 digit passcode for you to enter into your mac. Does it do this.
The tv should now have appeared in your device list in itunes and by clicking on the device you should be able to enter the passcode to register with itunes. Can you do this.
I suspect you can do neither from what you have said but whilst I wouldn't be surprised if the later didn't happen, I'd be surprised that the former didn't.

Mac mini doesn't boot the first time i turn it on

hello,
i have a strange problem with my mac mini and was wondering if anyone had heard of it before.
when i turn on mac mac, the light comes on and i hear drive noise, but no chime. no video is sent to the display (the monitor flashes "no signal"). however, if i wait for 5 or 10 minutes, turn it off by holding down the power button and then turn it straight back on it again, it starts up as usual (with chime).
could this be a software problem or is it more likely a glitch in the hardware?
mac mini, 1.66ghz intel
mac os x 10.4.11
cheers,
jack.

That doesn't sound like a software/OS problem, because MacOS doesn't begin to load until after the initial startup, including the chime and the grey screen with Apple logo. Since you don't get the chime or display, it sounds like the system has a hardware problem, or perhaps an issue with PRAM.
As a first step I would reset PRAM as follows:
-Shut down the computer.
-Locate the following keys on the keyboard: Command, Option, P, and R. You will need to hold these keys down simultaneously in the next step but one.
-Turn on the computer.
-Press and hold the Command-Option-P-R keys. You must press this key combination before the gray screen appears.
-Hold the keys down until the computer restarts and you hear the startup sound for the second time.
-Release the keys.

Mac mini doesn't boot anymore

Hello all,
all of a sudden my Mac Mini (Macmini3,1) stopped booting: no chime, black screen; nothing happens. I didn't upgrade the hardware.
Now I found out that if I reset (== hold down the power switch until powers off, power on again) the mini 3 times in a row when it is "stuck" like that it boots normally the fourth time.
If I then try to restart from Mac OS X the LED flashes fast then there is a long beep (kind of like when there is a firmware upgrade)... and the mini is "stuck" again.
I was wondering if someone had a similiar issue, or if maybe someone had an idea how to fix this.
Thanks in advance.

"For Intel-based Apple computers shipping with Mac OS X v10.5.5 or later, Apple Hardware Test is located on the Applications Install Disc 2 and should be included with your computer."
Following these instructions on http://support.apple.com/kb/ht1509 I booted with the second DVD and pressed "D". Nothing happened. I then tried booting from the first DVD with "C" and getting all bootable volumes by pressing Option but all my attempts failed.
I guess it is related to my problem.

MacBook Pro won't start unless I unplug and replug battery

I have a mid 2011 MacBook Pro 15" that has this odd issue. I don't normally shut down my Mac and can be left on for days with lid closed when not using it and always have power cord plugged in, battery usually at 96% or so.
Usually this is fine and don't have problems but occasionally I'll open the lid and it appears that the Mac has shut itself off. When I go to press the power button nothing happens. I have found that if I take off the bottom cover and unplug the battery connector the replug it in after a few seconds the Mac will start up. It will then be fine for days without any issues but it seems to come back inevitably.
So question is what is happening here? Why does unplugging and reinserting the battery cable seem to clear the issue? Any ideas or help would be appreciated.

I have the same issue with my 15 inch early 2011 MBP as soon as it updated to OS X 10.9.4. I have reset the smc, the nvram, checked and repaired any disk permissions, verified the drive which identified no problems, reinstalled the software, replaced the power cable, called applecare to no avail, and my computer will not let me run a hardware test. During the issue it does not read the battery:
Battery Information:
Charge Information:
Charge Remaining (mAh): 0
Fully Charged: No
Charging: No
Full Charge Capacity (mAh): 0
Health Information:
Cycle Count: 0
Battery Installed: No
Amperage (mA): 0
Voltage (mV): 0
System Power Settings:
AC Power:
System Sleep Timer (Minutes): 10
Disk Sleep Timer (Minutes): 10
Display Sleep Timer (Minutes): 10
Sleep on Power Button: Yes
Wake on AC Change: No
Wake on Clamshell Open: Yes
Wake on LAN: Yes
Current Power Source: Yes
Display Sleep Uses Dim: Yes
GPUSwitch: 2
PrioritizeNetworkReachabilityOverSleep: 0
Standby Delay: 4200
Standby Enabled: 0
Battery Power:
System Sleep Timer (Minutes): 10
Disk Sleep Timer (Minutes): 10
Display Sleep Timer (Minutes): 4
Sleep on Power Button: Yes
Wake on AC Change: No
Wake on Clamshell Open: Yes
Display Sleep Uses Dim: Yes
GPUSwitch: 2
Reduce Brightness: Yes
Standby Delay: 4200
Standby Enabled: 0
Hardware Configuration:
UPS Installed: No
AC Charger Information:
Connected: Yes
ID: 0x0100
Wattage (W): 85
Revision: 0x0000
Family: 0x0085
Serial Number: 0x007da587
Charging: No
I know the computer reads the battery however, because when i turn it on while plugged in and unplug it, the system will start and run normal until it tries to load the UI. The grey screen with the apple icon suddenly turns yellowish and then shuts down. This happens with almost every major software update from apple.
Battery Informatio\

G4 won't start unless I unplug and replug power cable

Hello friends,
I recently picked up an old G4 MDD (dual 1.25). I am having a great time running old software, etc, save for one issue. Whenever I shut it down through the OS (Apple menu > shut down) it will not power back up unless I unplug the power cord from the back of the computer and then plug it back in. Once I do this it starts up fine. However, if I power it down by holding down the power button on the tower, then I can usually start it back up again without unplugging/replugging the power source. Any ideas?
Also, when I first got it home it did power down at random a few times. Just died on me mid-task. But it has not done this in a few weeks now, so I considered it an anomaly, but perhaps it is related?
Many thanks to the experts out there!

Stay tuned. I have some free time coming up in three weeks and am planning to devote as much as an entire day to this. I've had the same problem in one of my MDD's and a very nagging curiosity about it. It's definitely a puzzle that needs to be solved.
I believe that BDAqua is correct that the problem is with a faulty capacitor somewhere. I have several MDD's, so it will be easy for me to swap out some parts to narrow in on the problem. Then I'll start checking capacitors.
If successful, I'll post specific details.
Is that easily fixable? Does not sound like it for a newb.
If you've never soldered any components on a board, it might be a good time to call in a favor from a friend who is comfortable with such things.
If the problem is in the PSU, there could also be safety issues. Some capacitors in the PSU can hold enough juice to stop a human heart. When discharged correctly, they are perfectly safe to work with. When not discharged correctly, they can hurt you.

WDTV Live Medi Player - remote will not work unless I unplug and replug media player

Hi I know somebody may have answered this on another thread but I could not find it. I was wondering: Has anybody found the solution to the remote not working until I unplugged and replug the power adapter of the media player? It seems to me that something either gets reset in the unit to cause this and we just have to reset it by stopping the power from going to the unt and it somehow resets it back. I have the latest firmware on it, 2.0.32 I think. ansj64

Ansj64 wrote:I have the latest firmware on it, 2.0.32 I think.dont think, check Setup > About

WDTV Live won't turn on unless you unplug and replug the power adapter

This is the product I own: Western Digital WD TV Live Network-ready HD Media Player WDBAAN0000NBK-NESN I tried upgrading my firmware to see if that would resolve the issue and unfortunately I am still experiencing this problem. Previous firmware 1.03.49 Current firmware 1.05.04 Has anyone experience this type of issue with this product before?

Hello and welcome to the WD community.
On this case i recommend contacting support to see if they can better assist you on this matter:
http://support.wdc.com/country/index.asp?lang=en%22

Mac mini unable to boot, stuck in grey screen.

Hi,
i have a Mac Mini which I have kept up to date with current version of OS X (Mountain Lion)
After a recent reboot the system won't come up, it just hangs displaying a grey screen.
I have tried:
http://support.apple.com/kb/TS2570
I can boot up the system in single user mode.( https://support.apple.com/kb/ht1492 )
I have done a /sbin/fsck -fy and this works fine. I can browse the file system, the only
strange thing I notice is "BootCacheControl: Unable to open /var/db/BootCache.playlist: 2 No such file or directory".
I have googled quite a lot but I have not managed to find a solution for this, though it is frequently mentioned.
I have tried the normal diagnostics and no hardware error is reported.
I have tried to boot into local recovery, this starts but after a while I end up with the grey screen.
I have tried a Internet recovery and this starts, the screen flashes for a second and I end up with the gray screen
I have tried the different reset methods, such as NVRAM ( http://support.apple.com/kb/HT1379 )
I have tried to reset the SMC ( http://support.apple.com/kb/ht3964 )
I have swapped the RAM modules for other ones.
testing my internet connectivity; speedtest.net reports 15 Mbit downstream and 2 Mbit upstream
Even if I leave my Mac mini on for 12+ hours the internet recovery never finishes, nor am I presented with any options, just the grey screen.
Because the Mac mini doesn't ship with any DVD-media and the Mountain Lion I have bought is through the app store I couldn’t try to boot
from a DVD.
The reason I bought a Mac was to get away from problems which is typically related to computers (Windows). I am running out of ideas here,
please help!
Kind Regards

Whew,
Great work so far, is it still covered unfer AppleCare? I think you'd done all you can do & it needs to be taken in.

FileMaker Server problem on Mac Mini Server - Mac Mini won't boot

I just installed a brand new Mac Mini Server today, and also FileMaker Server 11. A first-timer for both Mac OS X Server and FileMaker Server, I made an error as explained below, and right now I don't know how to get back on track with the system. It won't boot.
So, how did this happen?
At first everything was proceeding according to plan. I configured the pre-installed Mac OS X Server on the Mac Mini with users, groups and services. This was tested from clients and this seemed to work just fine. Then I installed and configured FileMaker Server. This was also tested from a client, and the example database that came with FMS was served up just fine.
The problem arose when I tried to install my existing FileMaker databases. I simply checked to see where in the file system the example database was located, and then copied my old databases to that location (I think it was Library > FileMaker Server > Data > Databases or something close to it - can't check it now...). I had the FileMaker Server Admin Console running, and hit the Refresh button hoping that this would make FileMaker Server find the databases.
This was my first error. I should have read ahead in the instructions to see that one is supposed to use an Upload Database assistant instead...
What happened when I hit refresh was that the FileMaker Server Admin Console became completely unresponsive with a spinning ball as cursor. I left it for about an hour hoping it would terminate, but gave up and tried to shut it down. It wouldn't close, so I force quit it from the Finder. Then I tried to shut down FileMaker Server, but I needed to force quit this as well. After this I thought it would be best to reboot the Mac Mini, so I shut it down, but now it won't even boot, it just stays on the screen with the spinning wheel for ever!
I have tried all the keyboard options while booting, but nothing seems to help. In safe mode, the grey progress bar just grows to about one third, then disappears and leaves the eternally spinning wheel.
The server version of the Mac Mini doesn't have an optical drive, only two internal hard drives. I tried to reinstall from scratch using the optical drive on another Mac on the network. The startup disk appeared when I tried to boot the Mac Mini holding down the option key, and after about 20 minutes or so of the spinning wheel I could actually access the discs. I started by running Disk Utility to check disk permissions. There were a lot of repairs concerning permissions and groups, especially on "Library". It said "ACL differs on Library", I don't know what this is but this was repaired. I then ran Repair Disk. The volume appeared to be OK.
When I tried to reinstall Mac OS X Server however, this failed with the message
"You can't upgrade this version of Mac OS X because a newer version is installed. Mac OS X Server couldn't be installed on this disk." I don't know how this can be, but I may have run software update earlier today.
What should I try next? Should I erase the primary HD and try to install again? Or should I install the system software on the secondary HD? Or should I just try to reboot as is in the hope that the disk permission repairs did the trick...?
Any helpful pointers would be greatly appreciated!

Hello there, I came across your post when browsing the forum for passive advice. I am in the same boat as you and am a first timer for both of these tools. I work for a company who now needs to expand its network and database capabilities. I have been assigned this task and these are the tools i have opted for. I have not yet purchased them and i am pleased to find someone who has my desired setup. Could you please advise on the simplicity of the setup and whether an advanced knowledge is required.
I want to use it in a mixed operating system environment. Is this possible?
Regards
Matthew

Mac mini won't boot anymore

My Mac mini won't boot anymore. It's been running fine for months.
It's running Leopard Server 10.5.2 Build 9C31
It starts to boot, I get the first spinning gear with the gray screen, then the blue desktop blinks, then a second spinning gear on a gray screen and it appears to hang (the gear stops spinning).
I booted off the install DVD, ran disk utility, repaired the HD, repaired the permissions: the behavior is the same.
Safe mode doesn't work (same hang as above).
Single user mode does work.
I can connect to it via Server Admin while it appears hung.
The last few lines of the system log are:
May 15 18:38:58 server emond[67]: SetUpLogs: uid = 0 gid = 0
May 15 18:38:58 server emond[67]: SetUpLogs: opening /Library/Logs/EventMonitor/EventMonitor.error.log
May 15 18:38:59 server kextd[23]: writing kernel link data to /var/run/mach.sym
May 15 18:39:09 server KernelEventAgent[59]: tid 00000000 received unknown event (12)
May 15 18:39:20 server kernel[0]: display: Not usable
May 15 18:39:20 server com.apple.KerberosAutoConfig[126]: Kerberos configuration is up to date
May 15 18:39:20 server com.apple.ATSServer[125]: FODBCheck: New annex file created
May 15 18:39:21 server ARDAgent [130]: ******ARDAgent Launched******
May 15 18:39:21 server com.apple.KerberosAutoConfig[132]: Kerberos configuration is up to date
May 15 18:39:22 server ARDAgent [130]: call logout from LoginLogoutProxyCallBackFunction
May 15 18:39:22 server com.apple.launchd[1] (com.apple.RemoteDesktop.agent): Throttling respawn: Will start in 9 seconds
May 15 18:39:24 server loginwindow[58]: Login Window Started Security Agent
May 15 18:39:29 server servermgrd[53]: servermgr_calendar: created default calendar virtual host
May 15 18:39:31 server ARDAgent [146]: ******ARDAgent Launched******
May 15 18:39:32 server ARDAgent [146]: ******ARDAgent Ready******
May 15 18:39:33 server mdworker[109]: (Error) SyncInfo: Boot-cache avoidance timed out!
May 15 18:39:54 server Python[47]: CGImageSourceCreateWithData data parameter is nil
May 15 18:39:54 server com.apple.wikid[47]: Thu May 15 18:39:54 server.jeff.carpenter.name Python[47] <Error>: CGImageSourceCreateWithData data parameter is nil\n
May 15 18:39:56 server kernel[0]: AppleYukon2 - bad packet received. length: 1440, packet status bits: MII error
May 15 18:39:56 server kernel[0]: AppleYukon2: 00000000,00000001 sk98osx sky2 - - sk98osx_sky2::replaceOrCopyPacket tried N times
May 15 18:49:54 server kernel[0]: serialnumberd 194 FSWRITEDATA SBF /dev/dtracehelper 13 (seatbelt)
May 15 18:49:54 server kernel[0]: serialnumberd 194 FSREADDATA SBF /dev/autofs_nowait 13 (seatbelt)
May 15 18:49:54 server kernel[0]: serialnumberd 194 FSREADDATA SBF /usr/sbin 13 (seatbelt)
May 15 18:55:12 server kernel[0]: AppleYukon2 - bad packet received. length: 23, packet status bits: MII error
Any ideas?

Yes, it's been running Server since I purchased it.
I doubt the serial number is in use elsewhere: I purchased the 10-user version at a retail store in a sealed package and I've only installed it once.

Mac Mini Doesn't boot up unless I unplug and replug

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