New iMac: 4GB RAM upgrade does not boot

I have a new 24" 2.8GHz Intel Core 2 Extreme iMac. Bought the Crucial 4GB kit. Installed both sticks, but the iMac would not boot. I heard the hard drive spinning, but it would not boot. I removed a stick from the first slot ("first" from left to right looking at the screen), and inserted the 1GB oem stick. It booted fine. I thought I had a DOA 2GB stick, so I returned it to Crucial. Got my new replacement memory and tried again. Still would not boot. Switched slots. Same problem. Replaced the OEM 1GB in the first slot again, it it booted fine. I tried every configuration, and the only thing that works is the 1GB OEM in the first slot and one 2GB Crucial stick in the second slot. I cannot get 4GB of RAM to work. Any suggestions?

With the orginal 1GB and a 2GB module installed are you seeing all 3GB in "Apple / About This Mac" and Reading system memory usage in Activity Monitor?
Resetting the PRAM can solve certain startup problems.
Try installing the 2x2GB kit and restart the Mac immediately press Command-option-P-R and hold the keys down until the Mac chimes a second time. This resets the information in the Mac’s parameter RAM (PRAM) to its default values. The PRAM is a special area of RAM where data is retained even after you shut down the Mac.

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After upgrading to a new iMac 27 my iPhone does not sync with iTunes

After having the Apple Store migrate all my data and programs from an older iMac to a new iMac 27" my iPhone does not sync. After connecting the phone it begins and goes to about steps 3 or 4 and then the "apple" appears indicating it is finished - however new pictures have not been transferred to the phone and updates for apps have not happened. Any ideas?

Your music/movies, etc will only be where you put them.
Copy everything fom your old computer or your backup copy of your old computer to your new one

New iMac shuts down but does not start as set in Energy Saver Schedule

Set Energy Saver schedule to shut down at 2300 and it does so at approx 2305. Set schedule to start up at 0700 and it does so the next day but NOT after that (have repeated the exercise 3 times - same result!).

You should not be having "Energy Saver" problems on a new iMac.
Have you tried any of the following?Restarting your computer?
Doing a PRAM zap?
Since you are still under warranty, strongly suggest that you take full advantage of it by calling Apple tech support. Especially if you are within 90 days of your warranty and/or have AppleCare.

Macbook pro does not boot after upgrading ram

I have a macbook pro late 2011 which runs with mavericks operating system . I have tried to upgrade my macbook to 8Gb. Macbook does not boot when the two ram slots are filled with 4GB ram but runs well when the slots are filled with 2GB ram. When i try them individually with one slot of 2GB ram and another slot with 4GB they run perfectly which shows status ok in the RAM info. What could be the problem .

Around here, most of us recommend only Crucial and OWC for RAM because it's guaranteed to work with Macs and it's what most of us have. If I were you, I would return the RAM and look at purchasing RAM from either Crucial or OWC. If you can't get their RAM to work then you'll know that there's some trouble with your actual slots.
Good luck,
Clinton
MacBook Pro (15-inch Late 2011), OS Mavericks 10.9.4, 16GB Crucial RAM, Crucial M500 960GB SSD, 27” Apple Thunderbolt Display

IMAC does not boot, only beeps. Video attached

Hello:
I am trying to figure out why an iMAC does not boot properly.
Memory:1GB (only 1 module in one of the 2 available slots).
Everytime I push the power button I only hear a sound and that's it.
You can hear the HDD spinning but the screen is always black.
Please find the sound that the iMAC makes everytime I turn it on:
http://www.youtube.com/watch?v=duRTB3iDZEU
Keboard does not respond so I cannot use things like press a key when turning on the computer, etc.
Mouse light is ok.
I am a newbie with MAC's so excuse me if I'm not doing something right.
Thanks

Hello robertin75
Check the ram, if the module has gone bad, has become dislodged or not fully seated in the slot then the iMac will only beep indicating an error and will not startup.
http://support.apple.com/kb/HT2341
I'm not exactly sure which model iMac you have and so it's hard to give specific instructions, but if you check in the User's Guide that came with it you will find the instructions for replacing and installing ram in your model.
If you no longer have the User's Guide you can find out by using the the following link.
http://support.apple.com/kb/HT1463
or the next one if it happens to be a newer glossy screen aluminum model.
http://support.apple.com/kb/HT1758
Dennis

New system does not boot properly

I just set up a new system with:
a MS-6728 Neo2 FIS2R Mobo,
1gb Geil PC-3500 RAM (2x512),
2.6C proc.
2 Maxtor 120gb IDE drives RAID 0 with the onboard promise controller.
Lite-On DVD burner
ATI radeon 9800 video card
Enermax 300 watt power supply with:
3.3v - 28amp
5v - 30amp
12v 22amp
170watt total 3.3/5 combined
My problem is that my system NEVER boots up normally. It always freezes in the bios startup. The D-bracket stops at almost every possible combination of led's, which according to the manual the problems were: Testing RTC, Initialize Video interface, Testing memory, Initializing floppy controller, Memory detection, Decompressing bios to ram, possibly more. Sometimes I also just get beeping, either a continuous beep or 8 beeps. A few times it would display the bios startup screen, but halfway down would be gibberish characters and would be locked up. When I then turn the computer off then on again, the bios is reset at least somewhat(i know because I usually disable the full screen image on startup) and says memory timings are too tight, and I have the choice to enter bios or hit any key to automatically fix things. If I hit any key it will boot up ok. However when I restart/turn off the computer, the next time it again does not boot. I tried upping the ram voltages from 2.5-2.9v, and that seems to stay that way in the bios, even when it resets itself. Everything else is set to auto/slow. If I try to manually adjust the memory timings, even to the slowest possible settings, it does not boot, and I must turn it on/off a few times till the bios resets again, with the boot process stopping at one of the possiblilitys mentioned above. Using the info tab on speedfan, I got the memory info, and it displayed the voltage at 2.5v, not sure what that means but it is strange.
What I have already attempted:
I sent back the ram and got a new set, which hasn't changed anything. The first time the other ram failed memtest, this time it passed(for about 2 hrs). So I don't think its the ram.
I borrowed an antec truepower 430w powersupply, which had no effect.
I went back to bios version 1.3 from 1.9, which also seems to have no effect.
I was hoping to overclock the system a bit and enable performance mode etc etc, but now I'll be happy to just not have to go through a song and dance everytime I restart the computer. This is only the second computer I have built from scratch, and the first with raid, but that seemed to all go ok. Please help me diagnose the problem!

I too am having problems with my system.
865PE Neo2-FIS2R
2 Maxtor 120GB S-ATA drives, RAID 0, Promise
2 512MB Geil Ultra CL2-3-3-6
HP CD-RW
What IDE settings are you using?
E.g...Native? P-ATA Only...all of those settings
For me...sometimes XP will install and boot...but eventually system is unstable and XP crashes and corrupts itself...Event Manager errors different each time
Someone mentioned problems with Maxtor and AMI BIOS...anything I should keep in mind?
Sorry about all the different questions. I'm sure exactly where my problem lies. MSI thinks it may be my memory AND/OR on-board IDE controller since I can't get the on-board Intel RAID setup to consistently "see" and setup my RAID drives...even when it has worked...XP doesn't like the Intel configured RAID drives. Also tried just one S-ATA drive through on-board Intel and Promise. Next I will try a plain old IDE Hard Drive...no S-ATA...and make sure my memory passes memtest86+ testing.
Any other gems you can offer for this config??? Thanks.

21" iMac getting white screen and does not boot up

Hi All!
This is my first time to post here but have been using Mac OS since 2009.
I am having issues with my Mid 2011 iMac 21". I keep getting a white screen and it does not boot up.
I am a bit technical so I have done all the necessary steps as below:
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2. Reset NVRAM several times = No go
3. Went to Safe Boot = Vertical white stripes on blue screen appears
4. Tried booting on Recovery Disk = Vertical white stripes on blue screen appears
I'm thinking my video card is faulty now.
Any help guys? I hope my hard drive is not fried
What's worse, my 3 year extended warranty just expired last June and it's only been 3 months

First i can't send it back becuase it didnt have a warranty i purchased it on ebay. second the guy didnt send the install disks with it as he promised i have tried to follow up with him with no luck so hes been reported to ebay. and due to current buisiness expenses cant afford the new software. is there anything else i can do to at least boot the thing so i can figure out whats wrong with it. and has anybody experienced this before and if so how was the issue resolved. soooo frustrated as buisiness is at a stand still till this machine works. p.s.it has osx leopard latest version.
Message was edited by: AMILLIANZE

My iMac does not boot after update!!!

I have just update my iMac (Intel) with Apple Software update. I have not updated for quite a while and obvious there were a bunch of stuff to update on my mac. However, when the computer requests a restart, my computer simply does not restart at all. I have tried to make it restart from the apple icon, and it still stay on. So I turn it off manually and the problem kicks in. My computer start with the grey apple icon screen and the little progress indicator, but it does not boot into OS X!!! It remains in a blue screen with the mouse pointer.
I restarted it again unplugging everying and nothing changed. Then I tried Disk Repair and it does not help neither. Then I tried to hold the power button while turning it on till I get the loud beep noise and flashy light. The problem stay the same. I do not want to erase my disk...
Someone Helps!
Intel iMac 20" Dual Core / MacBook Pro 15" Mac OS X (10.4.6)

Interesting. Have you installed any third-party RAM? Is there any possibility that your RAM became loose? Make sure your existing RAM is seated properly.
Have you performed a SMC reset?
Resetting the SMC can resolve some computer issues such as not starting up:
From the Apple menu, choose Shut Down (or if the computer is not responding, hold the power button until it turns off).
Unplug all cables from the computer, including the power cord and any display cables.
Wait at least 15 seconds.
Plug the power cord back in, making sure the power button is not being pressed at the time. Then reconnect your keyboard and mouse to the computer.
Press the power button on the back to start up your computer.
Are you able to boot in SAFE mode? If so, you can trouble shoot from there.
Be sure the computer is shut down.
Press the power button.
Immediately after you hear the startup tone, press and hold the Shift key.
Tip: The Shift key should be held as soon as possible after the startup tone but not before.
Release the Shift key when you see the gray Apple and progress indicator (looks like a spinning gear).

HT3964 my imac 27 display has 5 blue lines and does not boot up what is the problem?

My Imac 27 displays 5 blue vertical lines and does not boot up. What could cause this?

I already anticipated the video card causing this issue. This was confirmed today by Apple issuing a campaign indicating the AMD Radeon 6970M video cards are defectivce and will be replaced free of charge three years from date of purchase. I looked at the new iMacs and found repairing them to be a nightmare. So, once this p.o.s. is repaired, I'm selling it and purchasing an ABA computer.

We just added a new printer and bluetooth connection to our iMac. Now iTunes does not recognize our iPads as devices. Have already tried restarting everything. Any other suggestions?

We just added a new printer and bluetooth connection to our iMac. Now iTunes does not recognize our iPads as devices. Have already tried restarting everything. Any other suggestions?

You can try the steps recommended here: http://www.apple.com/support/ipad/assistant/itunes/

New MBP i5 does not boot after hard disk swap

Hi there,
I received my new i5 MBP today. After booting it once with the installed HDD to check if it's ok, I exchanged the hard disk for the one in my Late 2008 Macbook Pro. After doing this, my Late 2008 Macbook Pro boots fine with the (new) hard disk from the new i5 MBP, but the i5 MBP does not boot with my old hard disk.
To give you some details:
- I have installed 10.6.3 on the (old) hard disk that's not booting.
- The i5 MBP boots fine from the installation DVD
- Disk utility finds and can read my hard disk, no errors
- PRAM NVRAM reset did not help
- when booting in safe mode, I can see the system stop booting after or while loading Extensions.mkext
My guess is, it tries to boot and load the wrong Extensions for the new system (CPU? GPU?). I have no idea how to fix this.
Any help would be greatly appreciated!

Focx,
Welcome to Apple Discussions.
Inserting the drive from an earlier model MBP will probably not work. The version of the system you have on that HD is designed for earlier hardware so when you put in in your new machine it's going to be recognized. What I'd recommend is re-installing the disk that came with the new machine and of course putting the 2008's disk back in the old machine. Then use Migration Assistant on the new machine and migrate your data from the old machine into the new machine.
This will provide a much more stable system and should work just fine.
Regards,
Roger

Toshiba Satellite P870 upgraded to Win 8.1 does not boot

I have a Toshiba Satellite P870 with Win 8 preinstalled. Soon after upgrade to Win 8.1 and basically successful removal of “watermark error” (secure boot activated) the machine stopped booting completely: after pressing the power button ventilator sound
is heard with periodically changing loudness as well as clicking sound from the speakers. The screen stays black. Attempts to start the PC through pressing F2 or zero buttons did not produce any result. Neither did I succeed with recovery discs I created before:
the system simply does not boot from the disk. It looks like I tried all options offered by Microsoft and Toshiba. I would be happy to roll back to factory settings.
Could someone give me hint what to do next?

Hi,
For the issue, let us know how to remove the “watermark error".
Meanwhile, I would like to confirm if you could access the BIOS.
I suggest you update the BIOS version to test it.
If you want to repair the startup issue, you should use windows 8.1 recovery discs or installation discs.
Meanwhile, if you cannot access the BIOS, it may be caused by hardware, I suggest you contact the Toshiba manufacturer for further help.
http://support.toshiba.com/
Note: Microsoft provides third-party contact information to help you find technical support. This contact information may change without notice. Microsoft does not guarantee the accuracy of this third-party contact
information.
Regards,
Kelvin hsu
TechNet Community Support

IMac Does not boot past Gray Screen

iMac does not boot past Gray Screen. 2008 24" Intel iMac running Mountain Lion with 1TB hard drive.
Problem started yesterday while I was web surfing, and my iMac frooze and shutdown. I rebooted and could only get as far as the gray screen.
On bootup the following things happen:
Startup tone
Gray screen with Apple, and gear spins below Apple.
Once the gear stops spinning, nothing happends.
Troubleshooting steps I have tried:
removed all devices connected to iMac and rebooted, but same symptons occur.
booted into Safe mode and run disk utilites.
     Disk Utilities found no errors on the drive, but did find two permission issues that it was able to fix.
          First permission issue:
                   "Group differs on library; Should be 0; group is 80"
          Second permission issue:
                    "Permissons differ on library; Should be drwxr-xr-x; They are drwxrwxr-t"
Disk Utilities says it fixes these issues and then I reboot, but get the same problem.
I reboot back into Safe Mode and run Disk Utilities and it discovers the same problems listed above with Permissions. It says it fixes them, I reboot, but the same problem occurs. Its as if we are stuck in some sort of loop process.
Booted into Single User Mode and ran the following command:
     /SBin/fsck -fy   it reports back, Volume Apprears to be ok.
I reboot, same issue !
Performed SMC Reset, Rebooted, same issue
Performed PRAM Reset, Rebooted, same issue.
Booted into Recovery Partitioin (Command R) and ran disk utilities. It found the same permission issues listed above. It fixed them. I rebooted. Same problem still.
While in safe mode, I preformed a full time machine backup.
I am out of ideas. Any help would be greatly appreciated.

Hello,
I reboot back into Safe Mode and run Disk Utilities and it discovers the same problems listed above with Permissions.
You can ignore repeated "fixes" it's not really a problem, if it says completed repairs that's all that's needed.
Luckily it boots in Safe Mode, here's basically the steps to try to find out what it is...
One way to test is to Safe Boot from the HD, (holding Shift key down at bootup), run Disk Utility in Applications>Utilities, then highlight your drive, click on Repair Permissions, Test for problem in Safe Mode...
PS. Safe boot may stay on the gray radian for a long time, let it go, it's trying to repair the Hard Drive
Reboot, test again.
If it only does it in Regular Boot, then it could be some hardware problem like Video card, (Quartz is turned off in Safe Mode), or Airport, or some USB or Firewire device, or 3rd party add-on, Check System Preferences>Accounts>Login Items window to see if it or something relevant is listed.
Check the System Preferences>Other Row, for 3rd party Pref Panes.
Also look in these if they exist, some are invisible...
/private/var/run/StartupItems
/Library/StartupItems
/System/Library/StartupItems
/System/Library/LaunchDaemons
/Library/LaunchDaemons
Though I'm suspecting some corruption to your OS at the moment.

Cisco Nexus 5596 does not boots up after NX-OS upgrade 5.1.3.N1.1 to 6.0.2.N2.5 [CSCun66310]

Hello Friends,
Just want to save your precious time & effort, while doing Nexus 5596 upgrades so wanted to share some useful info which you can have a look prior to your upgrades of Cisco Nexus 5596 device.
I recently ran into trouble when upgarding one of datacenter switch Nexus 5596 does not boots up and after investigation from Cisco TAC it comes out to be Bug documented below.
https://tools.cisco.com/bugsearch/bug/CSCun66310/?reffering_site=dumpcr
My Upgrade path of device was : 5.1(3)N1(1)  to 6.0(2)N2(5).
Since this upgarde involves upgrade of Bios and Power sequensor, I was having some doubts to get this succesfully upgraded, But there was more twist involved in this upgrade which I came to know after contacting Cisco TAC for my died Nexus 5596 device and got info that if you have below impacted version in your Nexus 5596 device and you are planning to do Upgrade, then you migh RUN into this serious BUG aftre which device won't come up at all and only Option left is to replace with RMA device.
PID                          Impacted                   Hardware versions      Updated Versions
UCS-FI-6296UP                                            1.0                                       1.1
N5K-C5596UP                                              1.0                                        1.1
N5K-C5596T                                                 1.1                                         1.2
You can check hardware version using below command from your device.
5596# show sprom sup | inc H/W
H/W Version     : 1.1
So please be carefull when planning your Nexus 5596 upgrade and verify above things as this Bug is not present anywhere in Upgrade docuemntations unfortunately.
Hope this will help and save someone's precious Time.

Today "upgraded" our switch (N5k-C5596UP) to from 5.1(2)N1 to 7.0(5) and after reboot no life from the switch either. Even no console response. show sprom sup | inc H/W shows 1:0.
Only thing we could do is RMA the switch. So what must I do with these switches? Have still to do 3 of them.

TS1367 Hallo,I have an IMAC 21.5. which does not start.When i press the power button i hear only beep with an interval of 4-5 seconds.Some times when i take off the RAMS and put them again then get a white screen and shows that i have to insert a bootable

Hallo ,I have an IMAC 21.5. which does not start.When i press the power button i hear only beep with an interval of 4-5 seconds.Some times when i take off the RAMS and put them again then get a white screen and shows that i have to insert a bootable device.Then i bought OSX mountainlion on line and wrote it on a DVD and tried with a USB key board to start the DVD.But does not work.Please help me to get this imac work.
Thankyou in advance for your help.
Terrence

Hey terremo,
Thanks for the question. From the information you provided, it sounds like the iMac is successfully turning on, however video is not displayed. These symptoms can usually be isolated further by the troubleshooting steps in this article:
Apple computers: Troubleshooting issues with video on internal or external displays
http://support.apple.com/kb/HT1573
Thanks,
Matt M.

New iMac: 4GB RAM upgrade does not boot

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