Endless start-up loop?

Hi, our 14" ibook w/ recently repaired logic bd from Apple is now stuck in endless start-up. Powers up ok goes to blue "home" screen, dock appears at the bottom, macintosh hd icon visible, then starts again. I can click on any icon and it seems as if its working then just goes all blue again. What's up w/ this? Any ideas b/f I head back to the Apple store?
Ken

Are you able to start up in Safe Mode? If so, that could resolve the endless loop. This will take quite awhile longer than a normal startup because it does a file check and repair of the hard disk.
If this works you will see your normal desktop. Once completely started up in Safe Mode, try to restart normally. If you can start up, then go to Applications > Utilities > Disk Utility. Select the named boot volume in the left sidebar ("Macintosh HD" unless you've renamed it). Repair permissions on it.
See if you are able to do a little hard drive maintenance to help things out. If this doesn't help, then I'd head back to the Store.
Good luck.

Similar Messages

Endless "Recovery Mode" loop on my iPhone 5.

Last night I decided to update my iPhone 5 to iOS 7.0.3. I connected my phone to my PC using the lightning cable and opened up iTunes, which prompted me to update my iOS. I hit "Cancel" so I could do a sync and backup before updating (as I always do). I then went back to the phone summary page and clicked the button to update the phone. It took about 40 minutes to download the update and after it downloaded, it failed. My phone went into Recovery Mode (picture of cable pointing to iTunes symbol). The summary page now prompted an alert saying that it has detected a phone in Recovery Mode and will need to be restored before being used. I hit "Ok" and then hit the "Restore iPhone" button. I got the warning that all data will be lost and I agreed to the terms of iOS 7.0.3 etc. The download then began. At the end of the download, nothing happenes at all. No error message appears. The phone screen simply goes black and then the Recovery Mode screen appears again. Once again, I am prompted to restore the phone. I have restored six times now and everytime it does the same thing. It is an endless loop.
I have tried different methods such as using a different lightning cable, different USB ports on my PC, and holding the power button and home screen to force it out of Recovery methods. My wife has the extact same phone and hers updated fine on my PC.
Any suggestions?

akorman Feb 9, 2014 8:21 AM
Re: Endless "Recovery Mode" loop on my iPhone 5. in response to MFothy
I was having this same problem (endless recovery mode loop) but I also have a broken Home button, so I'm not able to enter DFU mode. The fix for me was to go through the recovery, but after it restores the firmware, iTunes will tell you to leave the phone connected to your computer while it reboots.
If I leave it connected, the phone re-enters recovery mode. But, if I unplug the phone at this point (during the reboot) the phone goes to the Welcome screen and I can set it up again. If I try to restore from the iTunes backup, I get put back into recovery mode, but if I restore from iCloud backup, everything works.
So, in short:
Plug in the phone, start the recovery
After firmware is installed (while the phone is rebooting), unplug from the computer
Restore backup from iCloud, not iTunes
I have been messing with this for hours now, I finally came across your response. This worked like a charm, thank you so much!!!

How do you start a loop with an event and end the loop when u release ....

How do you start a loop with lets say an event of some sort, whether it be holding down a key or pressing the mouse click and then stopping the loop when you release that key or mouse button.?
double c = 1.8, i = 1, max = 90, exp = 0;
final double inc = 0.002; //speed at while it increases
boolean f = false, g = false;
while (true)
    while (f == false && stopMeter == false) //increasing speed going up to 90
        exp = Math.pow (c, i);
        i += inc;
        pAngle.setText (Math.round (exp) + "");
        if (exp > max)
            f = true;
            g = false;
        } //end if
    } //end while
    while (g == false && stopMeter == false) //decreasing speed going down from 90
        exp = Math.pow (c, i);
        i -= inc;
        pAngle.setText (Math.round (exp) + "");
        if (exp < 1)
            g = true;
            f = false;
        } //end if
    } //end while
} //end whilethis is a snippet of my increasing increments. Its for an angle meter. I can't get it to stop, when the user clicks or does something... the program just gets stuck in an infinite loop. I am still new to java and i do not know how to fix this.

You are in the wrong forum. Try this one instead: http://forum.java.sun.com/forum.jspa?forumID=31
/M

How do I prevent my Mac Pro from hanging up in a start/stop loop?

My Mac Pro has a strange behavior I need help with. This computer is used almost exclusively for audio recording in my studio. I run Cubase 4 as my primary sequencing software. Everything will be going fine during a session, and then the software will abruptly hang up in a *start/stop loop*, stuttering back and forth between these two functions for up to 2 minutes before stopping. During this loop problem, the start/stop transport buttons alternately light up and the song starts and stops. Nothing I have tried will interrupt the problem. It just runs its course and then stops, usually between 30 - 90 seconds.
Interestingly, the same behavior shows up in other applications and in the Finder. In Quicktime and iTunes, it shows up as a start/stop loop. In the finder, it will shuttle back and forth between two related functions and beep each time. In word, it will show up as a key stick, typing the same letter over and over.
Needless to say, this is all very frustrating and embarrassing when clients are here. Any help will be greatly appreciates. Let me know if you have any additional questions.

I'd begin with repairing your drives with Disk Utility and Disk Warrior; clone your system to another drive, and check for corrupt files and prefs.

GPRM-based button with Start at Loop Point Troubles

First of all, I'm running DVD Studio Pro 4.2.1 on OS X 10.4.11
I'm trying to finish a project where when a video ends, it jumps back to the menu directly to the next button in order. This menu also has a loop point set in order to skip an opening animation. So I wrote the following script to accomplish this:
1: mov GPRM 0, SPRM 8
2: div GPRM0, 1024
3: add GPRM0, 1
4: jump "menu name"(Loop) [GPRM 0]
When I simulate the disc, everything works fine. However, a burned disc fails to return to the loop point. It will start on the next button when the highlights appear at the loop point, but the menu will begin from the beginning animation, not at the loop point.
Is there some conflict between the GPRM based button command and the start at loop point command? I did perform a test with the GPRM based button commands left out and the start at loop point function worked perfectly.
Edit: The "GPRM 0" at the end of the script shouldn't be a link but in brackets instead... the forum changed it to a link by default.
Message was edited by: brazzamHD

Given lines 1, 2 and 3, it is very unlikely that GPRM0 will ever be zero...
What your lines are saying, roughly, is:
"find the value of the last button that was pressed on a menu, and reduce it to a simple integer we can work with. Add '1' to the button number and then jump to the loop point on the menu IF the value in GPRM0 is '1'"
The problem is that it will never be '1' because of line 3. The lowest value it could be is '2' when you keep that line in there.
Also, you don't specify which GPRM you are evaluating in either version of line 4 - I assume GPRM0, as that is the one you are working with in lines 1, 2 and 3.
If you want to return to the loop point of a menu depending on the button the user previously selected being the first button then the code is this:
mov GPRM0, SPRM8
div GPRM0, 1024
Jump MenuName (Loop) If (GPRM0 = 1)
However, you might want to simply start at the loop point of the menu but make sure that the user is on the same button they were on previoulsy, in which case the code would be:
mov GPRM0, SPRM8
div GPRM0, 1024
Jump MenuName (Loop) \[GPRM0\]
To do this you \must make sure that you have checked the GPRM based button checkbox in the property inspector.
If you want to go to the next logical button after the one the user was on previoulsy, then you would need to add a '1' to it. The code looks like this:
mov GPRM0, SPRM8
div GPRM0, 1024
add GPRM0, 1
Jump MenuName (Loop) \[GPRM0\]
Note that the bracket shapes are important... a GPRM based button jump means that you will go to a button which has a value the same as that in the specified GPRM. The square brackets signify it is this kind of move, and not a simple evaluation of true or false.

Start-up loop

I turned on my Pavilion DV6 yesterday and it is in a continous start-up loop.
It gets to the HP logo screen and then re-starts. It repeats this continuously.
I can press esc and it takes me to the start-up menu but (other than reset the BIOS which I've tried) I do not know what to do from there.
Could someone help me please?
Many thanks
JS

Thank you for visiting the HP Support Forums and Welcome. I have read your thread on your HP Pavilion dv6 Notebook and getting a continuous loop on startup. Try performing a hard reset. When performing a hard reset please note remove any and all USB devices, and remove memory cards from the card reader slot. Disconnect all non-essential devices. If that does not help try to turn on the computer you start to press F11 repeatedly till the menu opens. You can do a system restore.
Hope this is helpful.
Thanks.
Please click “Accept as Solution ” if you feel my post solved your issue, it will help others find the solution.
Click the “Kudos, Thumbs Up" on the bottom to say “Thanks” for helping!

Continuous Start Up Loop

Help. My iBook G4 is stuck in a continuous start up loop. It powers on, brings up the white screen, powers off and then starts all over again. It even does it when the lid is shut. I have to take the battery out in order for it to not continually start up and power off.

Hi David,
Bootup holding CMD+r, or the Option/alt key to boot from the Restore partition & use Disk Utility from there to Repair the Disk, then Repair Permissions.
Any change?

GPRM based button ignores Start at loop point!

I have made the well known gprm based button script that jumps to last pressed button of a menu, and it works fine, but if I also enable the 'Start at loop point' function it only works in the simulator but never on test discs or final DLT's.
Is it a software bug that DVDSP 4.03 ignores the start at loop point if it also should jump to a gprm based button?

Nice... I've just done this and got exactly the same as you.
It would appear to be that the loop point argument is stored in the same way a prescript is stored - and hence the GPRM based button jump doesn't work.
I'll look further into this to see if I am on the right lines, but you'll need to create a second menu which is identical to the looping portion of the first, then point to that instead of the first menu. A GPRM based button jump should then work:
mov GPRM0, SPRM8
div GPRM0, 1024
Jump menu2 [GPRM0]
This will have the same visual effect as you want, at the cost of having a second menu on your disc.

Start uo loop after updates

I bought Apple's Leopard upgrade disks and had 10.5.6 installed on my G4 just today. It ran fine until the Software Updates downloaded and were installing those updates (that included 10.5.8 combo.) The machine shut down and restarted but for the past 2.5 hrs it has been stalled at the gray screen start up with the spinning dial under the Apple logo. I don't want to shut it down or restart it until I find out the best way to do that safely. so I can proceed to find out what the problem is because I can't get any tech support until tomorrow.
What is the best(safest) way to proceed with this gray start screen loop? Any help avialable? Thanks.

HI,
I don't want to shut it down or restart it until I find out the best way to do that safely.
Understandable... it's ok to do this.
Hold the power button down until the screen goes black.
Now grab your install disc. Not the Leopard disc, but the machine specific disc that came with your Mac.
You need to boot from that install disc, run Disk Utility to verify and if necessary repair any errors on the start up disk.
Insert your install disk and Restart, holding down the "C" key until grey Apple appears.
Go to Installer menu and launch Disk Utility.
Select your HDD (manufacturer ID) in the left panel.
Select First Aid in the Main panel.
*(Check S.M.A.R.T Status of HDD at the bottom of right panel. It should say: Verified)*
Click Repair Disk on the bottom right.
If DU reports disk does not need repairs quit DU and restart.
If DU reports errors Repair again and again until DU reports disk is repaired.
When you are finished with DU, from the Menu Bar, select Utilities/Startup Manager.
Select your start up disk and click Restart
While you have the Disk Utility window open, look at the bottom of the window. Where you see Capacity and Available. *Make sure there is always 10% to 15% free disk space*
Carolyn

IPad will not start up. Stuck in start up loop?

My iPad is stuck in the start up loop.
Any advice on what I can do would be greatly appreciated.
Thanks

Yes, but you will need to restore your iPad. You will probably need to try recovery mode.
http://support.apple.com/kb/HT1808
Are you able to shut the iPad off?

My Apple TV is having problems with slideshows for photos synced from iTunes. How can I make it play thew whole slideshow without starting the loop again half way through?

My Apple TV randomly returns to the beginning in the middle of the slideshow for no reason. I don't habve the photos on shuffle
I started the slide show many times and somtimes it got through 20 photos, other times 50. Then all of a sudden, it goes back to the beginning and starts again. It's so frustrating as there is no reason for this and it doesn't loop back to the start on the same photo each time. I have about 350 photos in the album and they all loaded fine as thumbnails before I played the slideshow.
Can anyone help please?
Thanks, Adam

Have solved my own problem. My PC sits on the floor so I have a four-port USB hub on my desktop with one port in use. I use one of the other three ports for USB-related task. As I was shutting down for the night I had a - what turned out to be inspired - thought about whether there was an adequate power supply from the hub. I then tried the iPod USB connection directly into the front of my machine and everything worked. It seems that an inadequate power supply was the cause of this strange set of conditions.

How can I start a loop before the DAQ Assistand outputs a value?

Hi everybody,
I created a VI (See attachment) to Measure the speed of a turning wheel. (A optical detector outputs pulses which are proportional to the speed) The DAQ Assistant measures the frequency and the values are written to a log file. To log every 100 ms the value into the table, there is a while loop with should be executet 10 times a second.
The first question:
I want to start measurement as soon as I press "RUN". In fact, my VI first begins to run and log data when the wheel turns and the frequency is not "0". But I want to log data too, if the speed is "0". How can I programm that in Labview?
The second problem:
Labview writes not continuely the values: Sometimes 7 values a second, sometimes 11 values.... (I can see that because i log the time too). But if the programm runs for some seconds its getting better and better.
How can I force Labview to run the loop exactly tacted? Is my Computer too slow? Or is my method to log continuely data simply wrong? I am relative new in Labview and would be thankful in getting help.
Markus
Attachments:
Measure Frequency and Log data.vi ‏63 KB

I would say right off hand from what you describe that the issue is not related to computer speed, but choice of operating system. Windows is not a deterministic operating system - this means you can't count on how long it will take to do anything.
Mike...
Certified Professional Instructor
Certified LabVIEW Architect
LabVIEW Champion
"... after all, He's not a tame lion..."
Be thinking ahead and mark your dance card for NI Week 2015 now: TS 6139 - Object Oriented First Steps

IMac start up loop

I had no troubles installing and using maverick for the past 2 days until tonight this began to happen ...
my iMac will continuously be on start up with a disorientated background then it will loop and restart itself over and over!!!
anyone else with this issue? help!?

CD/DVD - Eject Stuck
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Try holding down the option/alt key during a restart to see if you can select the Recovery Volume there.

How to make main menu start at loop point when you link back to it?

I have a main menu with a an intro, after the intro I have put a loop point.
But when I link back to the main menu, it plays the whole intro.
How do I let the main menu start at the loop point when I target a button back to it?

Jake:
English is not my native language (I used Wikipedia to understand RTFM !!!).
I used to copy&paste some lines from the manuals when a post can be answered directly that way (why to write it again if it's well written there?).
This is my "last upgrade": I uploaded some captured images from the manual to use easier in this kind of frequent questions. I like to show that the information was right there in the manual . . . but I really find the expression RTFM a little hard !
;D
Alberto

Endless Telnet Read Loop

Hi
My goal is to constantly archive data to a local machine thru a Telnet connection. I receive a small amount of streaming data (25 bytes/second) thru a static IP address. The code that is attached is my attempt to
1) initiate a Telnet connection to a static IP address
2) read the streaming data, write to binary file on local machine
3) send some pertinent info to the screen for the user
since I always want to have the VI reconnect if the Telnet connection is dropped (or times out), I attempt an "endless" loop that will
4) close the Telnet connection
5) reopen the Telnet connection
6) recommence writing data to binary file on local machine
My questions are:
Q1) Did I write this correctly? Behavior is erratic. Sometimes works perfectly, sometimes doesn't work. I am unclear if I need to use a sequence of events within the outer loop to properly reconnect whenever a telnet connection is lost (sequence1: open Telnet, 2: write data. 3: close session, loop back to 1).
Q2) Often, when there appears to be no successful Telnet connection (by this, I mean no data streams to the screen which indicates the data feed will not be written to a binary file on the local machine), the numbers in the "File Size (bytes)" continue to increase. When I open the binary file to see what is being written I find the same character repeated instead of the data I wish to collect. I think perhaps that the Telnet Read is reading something, but I don't know what it is, or how to control it. Any ideas?
Thanks!
Attachments:
MBB06RawTelemetry.vi ‏27 KB

I said stop the inner loop either when the
button is pressed (as you still have) OR there is an error. So look at
the status of the error wire and OR it with the stop button before
wiring into the inner loops stop terminal.
Ok. Clear now.
I'm not sure
why you'd be getting a stop/continue dialog for error 56 because I
can't see anywhere in the code that would cause the dialog to pop up.
Drop some more indicators on your error wires, or probes. Run with
highlight execution turned on. Do any or all of these things until you
can figure out where the error is occurring.
Ok. I can do this. More later if necessary.
I don't know
where ^@ would be getting generated from unless somehow the telnet
protocol is doing it. What you could do is put a case structue or
select statement in the middle of the string so that if there is no
error, the string value goes from the read to the file. If there is an
error, an empty string goes to the file.
What do you mean by "in the middle"?
Q3: Is it possible that having multiple Telnet sessions open at one time would create issues like this? The final goal is to archive the telemetered data from 6 stations at once through the telnet port of one machine.
Go Beavers.

Endless start-up loop?

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