White screen on startup after reboot

Performed a system update, installed a bunch of new software, was prompted for a restart, now all I have a is a white screen and unresponsive machine. Any ideas? iMac is a week old. Frustrating because I had same problem on another one that this one replaced!

Please update your profile about your Mac; model, RAM, etc. The more complete the easier for folks to assist. Do you have any 3rd party peripherals attached? USB? Firewire? Did any of the Software updates include the EFI firmware update? Did you read and follow the installation directions for this update properly? Will your Mac restart with the Install Disc?
Here are some troubleshooting steps for when you see a blank, gray screen
1. Make sure the latest firmware for your computer is installed. Check Apple Downloads for the latest versions.
2. Disconnect all peripheral devices, except for the Apple keyboard and mouse. This includes USB, FireWire, mini-DVI devices. If this resolves the issue, connect one device at a time, restarting after each one, until you've determined which device is causing the issue.
3. Remove third-party hardware upgrades such as memory (RAM). If this resolves the issue, add back one item at a time, restarting after each one, to isolate the issue.
4. Start up from your Mac OS X installation disc and check the hard disk with Disk Utility.
5. Reset your computer's System Management Controller.
6. Additional tips may be available in Isolating issues in Mac OS X.

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I have a white screen at startup after installing Yosemite. Help!

imac 2011 goes to white screen and black cursor during startup

Hello Hackdog1,
It sounds like you are unable to boot your Mac after updating to Yosemite I would recommend you use the troubleshooting in the following article to help resolve the issue:
Mac OS X: Gray screen appears during startup
Start with these steps, and work your way down the rest of the article if needed:
Disconnect, test peripheral devices and network cables
Note: "Peripheral devices" refers to external devices other than what came with your Mac, such as hard drives, printers, or hubs that you connect via a USB or FireWire cable.
Shut down your Mac. If necessary, hold your Mac's power button for several seconds to force it to power down.
Disconnect all peripheral devices such as external hard drives or printers (leave only the display, a keyboard, and mouse connected).
Disconnect any Ethernet cables.
Start up your Mac.
If you can start up this way, one or more of your peripheral devices (or installed software related to the device) is probably causing the gray screen issue. Connect one device, then restart your Mac to test for the issue. Repeat the process until you locate the device at issue. Make sure the device is powered if it needs to be to operate correctly. Check with the manufacturer of the device for support or possible software driver or firmware updates that may be available for the device. Try a different cable with the device if possible (such as a different USB or FireWire cable).
Note: If you have multiple peripheral devices and the issue only occurs when they are all connected, but not when each device is the only peripheral connected, see the Additional Information section below.
If you are using a desktop Mac with a third-party keyboard and/or mouse device, and the issue still occurs, try starting up with an Apple keyboard and mouse connected instead. Try starting with no keyboard and mouse connected, then connect them after start up. Also, try a different USB port on your Mac.
If the gray screen issue persists with no devices connected, go to the next section (with the peripherals still disconnected).
Thank you for using Apple Support Communities.
All the very best,
Sterling

White screen - no startup after software updates 2007-007

I cannot start my mac g4 following a software upgrade I did last night. There were a series of upgrades. I just get a white screen and it will not boot. In the meantime, I cleared a partition on a second drive on the same machine and installed 10.4 on this and have used it to start up and look at the other drive. I have been backing up files onto one of my external drives but running out of disk space. I am really concerned since all my apps are on the original volume and I don't believe I can just transfer them. Problem is my partition on the drive I set up is also small (about 10gb) so thats not much room for anything more than the os plus a bit. Should I attempt to fix the original volume, should I try an archive and install, some advice really appreciated. Many thanks.

Hi there. Thanks for your advice. It is not practical to back up everything and I have backups of the files that are important but no one really wants to loose anything when you are confronted with making choices like this.
That said, I think some responsibility falls on Apple's shoulders to ensure that the older machines will update properly since it appears there are many g4's still in service. I have located another post similar to mine today that indicates this is not isolated to me - which leads me to believe it may just be a bad update.
Obviously there was some adverse effect from the new software since the system was good until the reboot with the updates. While I shouldn't expect this to occur, I get you're point about being prepared in the event it does. From my perspective, this experience is something that you'd expect from $MS. I have never had this type of experience after using a Mac now for almost 10 years. Worst case was a failing second drive (Maxtor) that I installed - but was able to recover the data using the Carbon Copy app.
In any case, I appreciate any replies and am hopeful I'll have recovered by the end of the day . Many thanks.

White screen on startup after using Bootcamp

I have a Mid 2011 21.5 inch iMac, 2.7GHz i5, 1TBHDD, 12GB DDR3 Memory, AMD HD6770M.
I also have it configured with a Bootcamp partition running windows, which is about 200GB. The other day, after running bootcamp, I restarted the computer in OSX from the Windows menu. The computer would initially not restart in OSX. It just sat there with the screen displaying all white. I did a hard restart with the power button, and after showing the all white screen for approximately another 5 minutes, the Apple logo finally showed up and it booted into OSX.
Since doing this I now have this same issue every time I turn on the iMac. It's only resolved by holding down the option key and selecting the Macintosh HDD from the available bootup disks. I've been running Bootcamp on this machine now for over a year and never had this issue before.
This is highly unusual, but has me worried. I also had a 2007 MacBook, which got a case of "white screen of death" about a month ago, and its irreparable.
Can anyone enlighten me as to what the problem might be? Failing HDD (it's not one of the recall models)? Motherboard? A problem with Bootcamp?
Any fixes people know about?
Thanks

Do you want to default to windows or Mac as the OS of choice? You can bless either one of them as the default.

I tried to install yosemite yesterday and my computer goes through the whole installation process and then to a blank white screen. I've rebooted, I've reinstalled several times and get the same result. Two days wasted!

I tried to install yosemite yesterday and my computer goes through the whole installation process and then to a blank white screen. I've rebooted, I've reinstalled several times and get the same result. Two days wasted and I can't use my computer!!

I don't know if you've already resolved your problem, but I had the same thing, it took me 6 hours to fix it. I had the exact same as you, installed the update and then it went to a white screen. After trying start up holding down cmmd r or holding down the alt key to try to install it again, nothing worked, same result every time. Then an angel came to me here somewhere but I can't find it now to thank him. Start in safe mode, press shift once you hear the start up chime and hold it down until you hear it again. Installation completion box came up and it was working. turn off computer and start up again normally and all is well. Except my final cut pro x doesn't work with it, have to update that now too. same as when I updated to mavericks.
Hope this helps.

White screen of death after 3 mins of usage

Hiyah, so my iphone got the so called "White screen of death" after 3 minutes of usage, i've tried restore and all of that but without success.
What should i do?
Send it in for repair? (seems really ridicilous if have to since it was bought the same day)
or
Take it back to the store where i bought it and ask for a new one?
Thanks in advance, oh yeah.. i live in Sweden.

Standard troubleshooting steps in the following order:
1. Reset: Press the sleep/wake button & home button at the same time, keep pressing until you see the apple logo, then release. Ignore the slide to power off.
If no change, continue:
2. Restore your phone from your most recent backup, Note, however: if the problem is related to corrupt data in your phone's backup, while this will restore a fresh OS, it will also restore the problem.
If no change, continue:
3. Restore as a "new" phone in itunes & re-sync your content. All saved data will be lost.
If no change, make an appointment at an Apple store, as you most likely have a hardware problem. There are no more user troubleshooting steps available.

Help with white screen on startup PLEASE!

My new imac is only showing a white screen on startup. I am not really confortable with mac's yet to start trying a bunch of different things, I did try a restart where you press four buttons (p and r restart I think).
I made an appt. tomorrow for the mac store. My question to you is, is this a hard drive issue. I have read a little that others have had this problem...did you loose everything on your hard drive?
Thanks guys,
Michelle

To add to the conversation, my iMac has decided not to start up any further than the grey screen with apple logo and scrolling symbol. I haven't a clue what to do with it!
I tried doing a safe boot but that didn't work. I then tried to access the disk utility repair but i upgraded the operating system on my comp to tiger so i don't know if i should be using that cd or the one that came with my computer thus old operating system.
If anyone could shed any light on this i'd be most gratefull.. i hear reports of needing a replacement hard drive.... nooooooooooooo

Curve 8520 os: 5.0.0.681 randomly crashing and only shows white screen and unable to reboot unless plugged in

Anyone else suffering from their curve 8520 os: 5.0.0.681 randomly crashing and only showing a white screen as well as it being unable to reboot unless it is plugged in? It often occurs when I'm playing media, using apps and maps. Had the same problem with my previous phone so it was sent in for repair and replaced but I'm still suffering from the same problem with the replacement handset! Any ideas how it fix this?
Thanks

Hello Me_Again
Welcome to BlackBerry Support Community Forums
Since you got a replacement it the same old Battery you are using or its a new Battery with your replacement device.Sometime this white Screen or unable to reboot happen because of weak battery .I suggest if you can arrange a good quality Battery then try running your device a few hours to see if the problem is within the device or its just Battery issue.
Prince
Click " Like " if you want to Thank someone.
If Problem Resolves mark the post(s) as " Solution ", so that other can make use of it.
Click " Like " if you want to Thank someone.
If Problem Resolves mark the post(s) as " Solution ", so that other can make use of it.

I have a white screen and i tried rebooting the ipod touch by holding the home and sleep button simoltaneously but it still jus tappears white. i also attempted to connect my ipod to itunes but my itunes wont even recognize my ipod touch 4g

i have a white screen and i tried rebooting the ipod touch by holding the home and sleep button simoltaneously but it still jus tappears white. i also attempted to connect my ipod to itunes but my itunes wont even recognize my ipod touch 4g. What should I do now?

Just let the battery drain until the screen shuts off. When you charge it back up it should boot up normally.

I get a white screen at startup that turns to checkerboard pattern

My iMac Intel 2012 20" displays white screen at startup then the screen turns to a checkerboard pattern adn goes no futher.
Thanks

My iMac Intel 2012 20" displays white screen at startup then the screen turns to a checkerboard pattern adn goes no futher.
Thanks

HT2452 White screen at startup and stays?? How can I get past this?

White screen at startup and stays?? How can I get past this?

Safe Boot is perfoming a disk integrity check and repair process which may take a long time. Let it complete, though if the startup disk requires repair to begin with, it is likely already in a failed state.
If the Mac eventually starts, take that opportunity to back up your important data if you have not already done so. It may be your last.

HT1349 My IPhone (original) went to a white screen yesterday. I rebooted successfully. Now it shows nothing and will not start, will not reboot. I do not have the serial number.

My I phone went to a white screen yesterday. I rebooted successfully. Today, will not start, blank screen, no white screen, won't reboot. Can you advise?

Sounds like it's time for a new phone.

After sleep, mac opens with white screen, have to manually reboot. what's the deal?

after 15 minutes, mac goes to sleep. when I go back to it I have white screen and have to manually reboot.

Hi georgenjr,
Welcome to the Apple Support Communities!
I know this article doesn’t list the exact issue you are experiencing but I would suggest the steps to troubleshoot.
Mac OS X: Gray screen appears during startup
http://support.apple.com/kb/ts2570
I hope this helps,
-Joe

White Screen during Startup

Everything was working fine on the Mac until about an hour ago when I tried to install software updates and then the screen fades and a message pops up saying the computer needs to be restarted by holding down the power button.
After doing that, the computer is now stuck on a blank white screen every time it is restarted. FYI, there is no external hard drive connected to the computer. Here's what I have tried thus far to troubleshoot:
Completely disconnect from the electrical outlet and restart.
Restart with the OSX Install disc in (also tried this holding down "c", both times just goes straight to white screen and won't do anything else)
Tried resetting PRAM (it made the second chime but still wont go past the white screen)
Restart in single-user mode and safe mode (still just stuck on the white screen)
Tried restarting with any USB cables disconnected
Tried restarting with the Ethernet cord disconnected while holding down the D key per the instructions in the "Everything Mac" book (only thing connected was the keyboard + mouse)
NONE of this has worked or caused any different result, it's still just showing a blank white screen.
Can anyone suggest another possible solution or cause for this problem?
Thanks!

My iMac is brand new, barely 2 months old. I've been getting the white screen quite often at startup. The only way I can get past it is to hold down power and reboot. One thing I've noticed... I'm pretty sure it only happens when I have external drives connected. If I shut down with my hard drives mounted and restart, I tend to get a white screen. If I disconnect them, startup is perfectly fine. I'd hate to have to disconnect Time Machine every time I power down, though. What a pain. Just installed Snow Leopard; perhaps it will fix this (though it did not, sadly, fix the missing "new mail" sound, so who knows)?

Stuck at white screen on startup

I managed to kick the plug from the wall and kill power to my computer.
Upon restart the computer only goes as far as the white screen with the Apple logo. I can't get the dvd currently in the drive out to run a startup from the OSX disc!
Help?!?

Five ways to eject a stuck CD or DVD from the optical drive
Ejecting the stuck disc can usually be done in one of the following ways:
1. Restart the computer and after the chime press and hold down the left mouse button until the disc ejects.
2. Press the Eject button on your keyboard.
3. Click on the Eject button in the menubar.
4. Press COMMAND-E.
5. If none of the above work try this:
Open the Terminal application in your Utilities folder. At the prompt enter or paste the following:
/usr/bin/drutil eject.
If this fails then try this:
Boot the computer into single-user mode. At the prompt enter the same command as used above. To restart the computer enter "reboot" at the prompt without quotes.
To fix your other problem you may be able to do the following:
How to Perform an Archive and Install
An Archive and Install will NOT erase your hard drive, but you must have sufficient free space for a second OS X installation which could be from 3-9 GBs depending upon the version of OS X and selected installation options. The free space requirement is over and above normal free space requirements which should be at least 6-10 GBs. Read all the linked references carefully before proceeding.
1. Be sure to use Disk Utility first to repair the disk before performing the Archive and Install.
Repairing the Hard Drive and Permissions
Boot from your OS X Installer disc. After the installer loads select your language and click on the Continue button. When the menu bar appears select Disk Utility from the Installer menu (Utilities menu for Tiger.) After DU loads select your hard drive entry (mfgr.'s ID and drive size) from the the left side list. In the DU status area you will see an entry for the S.M.A.R.T. status of the hard drive. If it does not say "Verified" then the hard drive is failing or failed. (SMART status is not reported on external Firewire or USB drives.) If the drive is "Verified" then select your OS X volume from the list on the left (sub-entry below the drive entry,) click on the First Aid tab, then click on the Repair Disk button. If DU reports any errors that have been fixed, then re-run Repair Disk until no errors are reported. If no errors are reported, then quit DU and return to the installer.
2. Do not proceed with an Archive and Install if DU reports errors it cannot fix. In that case use Disk Warrior and/or TechTool Pro to repair the hard drive. If neither can repair the drive, then you will have to erase the drive and reinstall from scratch.
3. Boot from your OS X Installer disc. After the installer loads select your language and click on the Continue button. When you reach the screen to select a destination drive click once on the destination drive then click on the Option button. Select the Archive and Install option. You have an option to preserve users and network preferences. Only select this option if you are sure you have no corrupted files in your user accounts. Otherwise leave this option unchecked. Click on the OK button and continue with the OS X Installation.
4. Upon completion of the Archive and Install you will have a Previous System Folder in the root directory. You should retain the PSF until you are sure you do not need to manually transfer any items from the PSF to your newly installed system.
5. After moving any items you want to keep from the PSF you should delete it. You can back it up if you prefer, but you must delete it from the hard drive.
6. You can now download a Combo Updater directly from Apple's download site to update your new system to the desired version as well as install any security or other updates. You can also do this using Software Update.

White screen on startup after reboot

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