Abnormal Shut-Down Sequence After Power Supply Replacement ???

Before the repair, there was a spinning wheel on the blue screen before the shut-down. But now the machine just cuts the power completely the moment the blue screen appears. Do you guys think that there is something to do with the new power supply ?
Thanks for helping me !

Going through the exact same issue started about 1.5 weeks ago thinking about giving up and buying a Mac mini for access and snow leopard.

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HP 630 shuts down seconds after power on

HP 630, i3 processor, OS WIN7
Hello. I hope someone can hel me with this problem.
After pressing the power button the screen comes on and I can see the black screen with the HP logo in the middle and in the lower left corner ist says "Press the ESC key for startup menu". The boot does not go past this screen ans the notebook shuts down after 30 seconds.
What I have tried so far:
Removed HDD and RAM and reinserted them again and tried to boot.
Results: The same, shutdown after 30 sec.
Removed battery and power plug and pressed the power button for 30 sec. Then I connected the power (only) and tried to boot again.
Results: The same.
Tried to boot without HDD.
Results: Error message "Boot device not found..." and shutdown after 30 sec.
Booted into bios and set the defaults. I have to be quick because I have only 30 sec for making changes before it shut down again.
Results: The same.
Tried to boot from live flash disk drive with linux mint.
Results: The flash drive is detected and I see the same black screen with the HP logo. It seems to me that the system freezes at this point bacause flash drive led stays on and I am unable to enter the boot menu anymore by pressing ESC key. After 30 sec.shutdown.
Any help is very apreciated. Thank you.

Hello @Mainzer ,
Thanks for posting on the HP Forums!
I understand you are experiencing an issue with your notebook. However, since this is a commercial notebook, you should post your issue on the notebook board of the HP Enterprise Forums for a better answer.
Have a wonderful day!
Mario
I worked on behalf of HP.

Shut down right after power up

My iMac G5, which of course just left warranty, turned itself off today. Now, when I power it on, the screen comes on, and it starts to boot for 10-60 seconds and then shuts off, never at exactly the same place.
It does this over and over.
My SN does fall within the range of power problem iMacs.
What am I looking at? Any chance this is RAM?
iMac G5 20 1.8 Mac OS X (10.4.3)

I am having the exact same problem. My SN did fall within the range and I called apple and they said it is not covered. It will start up in single user mode and I ran fsck and still not working. Starts up progress spins for a bit and then it shuts down and restarts itself. It does this over and over. Anybody have an idea?

Macbook shuts down unexpectedly after an hour of use

I've had my MacBook since 2006, and I've had some minor problems now and then.
But since few days ago, my mac shuts down unexpectedly after I use it for about an hour.
at first I thought that maybe it's the fan, cause I've never cleaned the fan since the day I've bought it and my mac gets pretty hot after a while. but it used to work just fine when it got even hotter.
now I'm guessing maybe it's the battery? I've also never replaced the battery to a new one, cause I've almost always used power adapter instead of using battery alone. but I think I've heard it somewhere that the battery still dies even when you only use power adapter. is this true?
I usually just turn mac right back on when it shuts down, and it goes well for about 30 mins and then it shuts down again.
could anyone please be kind enough to tell me if it is the battery that's causing this such a frustrating problem? I don't know if this would help figure out the problem, but this is what battery info says,
Battery Information:
Battery Installed: Yes
First low level warning: No
Full Charge Capacity (mAh): 3674
Remaining Capacity (mAh): 3648
Amperage (mA): 0
Voltage (mV): 12443
Cycle Count: 105

Thank you so much for answering! I've actually read your answer to other similar forum, and have just installed iStatPro. it says that my fan is "exhaust" and at 0rpm. do i HAVE to replace the fan to a new one? can I just open up my mac and clean out the fan? if so, would you recommend this instead of buying a new fan? one last thing, if I buy a new fan, is it easy for me to replace it by myself? again, thank you so much for your answer.

PPC MacMini shuts down immediately after boot, LED blinks

A client gave me his PowerPC MacMini which boots up but then shuts down after a few seconds. Unfortunately, there's not enough time to open the system preferences between booting and automatic shutdown.
I've tried to boot the computer from a system DVD and with "T" pressed for target mode, but it always boots up completely from the internal drive. Booting with "Shift" pressed boots in safe mode, but the machine still shuts down after a few seconds.
Interestingly, the power LED blinks about once per second. I wasn't able to find anything about this on the Net.

AndyO wrote:
If, on the other hand, the mini is starting up, and then failing, and the light isn't so much blinking as pulsing, then the system may be suffering protective shutdown as a result of overheating. That can be tested by seeing whether it runs longer after being left unplugged for several hours, thus being cold, than it does if it's been running (or attempted to be run) for some time, and is thus already warmed. In that event, the mini will need to be disassembled to some extent to try and identify whether the fan is running, the CPU heat-sink is firmly attached and the thermal pad which is squeezed between the underside of the logic board and the base of the system is replaced.
I have a Mac Mini Intel Core 2 Duo that is suffering almost the same symptoms (shut-down almost immediately after startup); however, it DOES appear to be for a variable length of time based upon how much time I let it sit and 'cool' down; therefore, I believe I'm experiencing an over-heating issue.
I've installed a matching 1GB pair of RAM about 1.5 months ago and all has been fine until now. The unexpected (which is now expected) shutdown after startup is occurring on both Mac OS X 10.5.2 and Windows Vista (on Boot Camp partition) ... of particular note ... the Windows side shuts down more quickly (likely due to it not having the same system monitoring/energy handling tools that would be available to the Mac OS X side ... so I would suspect it to over-heat sooner on the Windows side).
Successfully completed Hardware tests (simple & extended) reported memory and other system hardware was fine. 'Check/Verify Disk' on Mac/Windows side reported no issues with either partitions.
Attempts to reset the PRAM and SMC have not solved the problem.
There was one instance, after startup, that the fan ran at full speed continuously and noticed that the power light was not on at all ... at the time, I was on the Mac startup disk and it stayed up and running for about 20 minutes or more until I decided to shutdown and test the Windows side. Upon restart, the fan did not run continuously, and the Windows side shut-down shortly after start up.
Overall, I'm fairly convinced it is an over-heating problem. If anyone has any ideas or reference material to confirm or how-to-do "the CPU heat-sink is firmly attached and the thermal pad which is squeezed between the underside of the logic board and the base of the system is replaced" that would be greatly appreciated.
I am not ruling out sending the machine into the retailer for servicing/diagnostics; however, if there's a relative quick fix so that I don't have to identify and remove confidential/sensitive info first, that would be preferred.
Thanks.

My imac 20.5" is shutting down unexspectedly after about 10-15 minutes of use.

My Imac shuts down unexspectedly after about 10-20 minutes of use. If I unplug the power and wait for a period of time it then boots back. Not sure if there is some type of sensor that detects heat and then shut down the computer as a safegurad. Coudl the sensor or some other sensor be decting a situation that automatically shuts down the computer?
Steve

That's extremely unfortunate. From what I've seen, this could likely be a logic board problem. Just to make sure it is not some kind of software issue, do you have another computer that you could download a linux distro such as Ubuntu? If you do, please get a blank CD or DVD, and burn the distro of linux to it (but not just like you'd burn a normal file, if your on a mac, you do it by opening the DMG (linux distro) that you downloaded with Disk Utility, then burn it from there. If you have a PC, I can give you further instructions, or you can follow the instructions for burning the CD on Ubuntu's website (http://www.ubuntu.com/download/ubuntu/download) and scroll to step 2, or you can order a free ubuntu cd, but that can take weeks to arrive.
After you have your CD burnt, insert it into your iMac, restart your iMac, and boot from your optical drive during boot by holding down the C key as the computer is starting up. Eventually, the Ubuntu main install screen appears, and select, using the arrow keys and the enter key, the option for trying Ubuntu on your computer before installing. This will start up a live environment of linux that is running on your computer off of your RAM and off of the CD, but has nothing to do with your hard drive. If there is no shutting-down issue in Ubuntu, then you could try mounting your main hard drive from linux, getting all the files you need either uploaded to the internet or copied to an external drive, then re-installing your iMac's software from the original restore discs, then installing all of your software again. If you have a program from Adobe that you paid for (aka not Flash player and stuff like that) say, Photoshop, you need to deactivate your Photoshop license before you restore your operating system, or else you'll have to contact Adobe support because your product may complain, on reinstallation, that your license is already in use.
If indeed the shut-down happens while you have Ubuntu booted up, then it is a hardware issue, such as the logic board, in which case your best option would be to take it to Apple and have it fixed, especially if the iMac is still under warranty (Applecare, considering the age of your iMac if it is not one of the 21.5 or 27 inch). Replacing the logic board yourself would involve a lot of work on your part, and you would likely break another of the delicate parts inside of the iMac if you don't have the proper tools and aren't too caught up with the anatomy of your iMac.

Abnormal Shut Down

My MacBook has begun to intermittently demonstrate an abnormal shut down. It appears to shut down properly, the screen goes blank, the drive stops, but when I close the cover the sleep indicator light begins to glow.
However, when I open the cover (the light goes out) the computer does not come back to life. I discovered I need to hold down the power button for several seconds to actually shut it down.
Then, on the next start, I get a message that the computer was abnormally shut down.
I have checked the processes, and made certain that no software is left running. I'm stumped. Any ideas?
Thanks

I have exactly the same problem, except for the error message at boot, I don't have any message.
my 2 years macbook, probabily after 10.5.3 update, SOMETIMES, when I shut down, have the same problem: black screen but the fan keeps working, and my mouse keeps on (I can see the light under my mouse).
I've tried to reset SMC holdin down the power button for several seconds at boot and I also tried to repair permissons...nothing...sometimes it shut down properly and sometimes not...
now I'll try to reset the PRAM..
but what's the problem? I use my macbook everyday in the same way: safari, thunderbird, amsn, word 2008, excel 2008, itunes, vlc...
It's a leopard problem o it's a smc problem?
if it's a leopard problem I can solve with a new installation...but if it's a smc I have to call the support...pay...etc..

Facebook shuts down unexpectedly after a few minutes.

When using Facebook on Safari, Google Chrome or the app it shuts down unexpectedly after a few minutes. I tried restarting my iPad, reloading the app & deleting the cookies. It's frustrating.

Gilroy4 wrote:
Just this evening, my new 23" Intel i3 Mac starts randomly shutting down after a few minutes each time. Thoughts?
Humm.... my first thought is that the new iMac's only come in 21.5 and 27" and the second is that your not giving us much to go on. You know things like, it ran fine for the first hour, day, week, month, I checked the power cord to make sure that the connections are tight, I followed the User's Guide, it was working fine until I upgraded the RAM, plugged in my printer, an External Hard Drive, I started having this problem after I downloaded xxxx, it fell off the desk, I dropped it down the stairs on the way from the car to the house, the UPS driver kicked it off the back of the truck, you know the basic stuff like that.

Macbook pro 2012 shuts down right after start up!

macbook pro 2012 shuts down right after start up. I tried the recovery mode but disk doctor cannot repair Mac osX hard drive.This is the second time that I have to format hard drive and install agin all applications. please advise!

I am not familiar with "disk doctor" but if you used Disk Utility to repair or reformat the hard disk, and it failed again, it is very likely the drive itself needs to be replaced. It cannot be repaired.
If Disk Utility cannot repair a hard disk it definitely needs replacement.
All 2012 MacBook Pro models are less than a year old and therefore covered under Apple's standard one year warranty. Have them fix it.

My ipad2 shuts down completely after I press the sleep button and does not start.... Help please

My ipad2 shuts down completely after I press the sleep button and does not start.... Help please
This started since the latest update!!!!!!!!!!!!!!

Hi Alkaf,
Welcome to Apple Support Communities.
It sounds like your iPad will not turn on. Take a look at the iPhone article linked below, it provides tips that will help resolve power issues for both iPhones and iPads.
iPhone: Hardware troubleshooting
http://support.apple.com/kb/ts2802
Will not turn on, will not turn on unless connected to power, or unexpected power off
Verify that the Sleep/Wake button functions. If it does not function, inspect it for signs of damage. If the button is damaged or is not functioning when pressed, seek service.
Check if a Liquid Contact Indicator (LCI) is activated or there are signs of corrosion. Learn about LCIsand corrosion.
Connect the iPhone to the iPhone's USB power adapter and let it charge for at least ten minutes.
After at least 30 minutes, if:
The home screen appears: The iPhone should be working. Update to the latest version of iOS if necessary. Continue charging it until it is completely charged and you see this battery icon in the upper-right corner of the screen . Then unplug the phone from power. If it immediately turns off, seek service.
The low-battery image appears, even after the phone has charged for at least 20 minutes: See "iPhone displays the low-battery image and is unresponsive" symptom in this article.
Something other than the Home screen or Low Battery image appears, continue with this article for further troubleshooting steps.
If the iPhone did not turn on, reset it while connected to the iPhone USB power adapter.
If the display turns on, go to step 4.
If the display remains black, go to next step.
Connect the iPhone to a computer and open iTunes. If iTunes recognizes the iPhone and indicates that it is in recovery mode, attempt to restore the iPhone. If the iPhone doesn't appear in iTunes or if you have difficulties in restoring the iPhone, see this article for further assistance.
If restoring the iPhone resolved the issue, go to step 4. If restoring the iPhone did not solve the issue, seek service.
-Jason

PowerMac G5 Power Supply Replacement _ Sharing some information

I thought I might share my experience here with the recent replacement of the 600w power supply on my DP 1.8 G5.
Like many who have experienced the failure, the loud cap gun like sound when the PS failed was a sound I didn't want to hear.
Because this system is the workhorse of my business it was imperitve that we ether got it back up and running or replace it. After a quick call to Apple, even though the system is out of warrenty, I realized this was going to be an in house repair, one because of the cost invloved, and two because of our time frame.
My thought was how bad can a power supply replacement be? We replace them all the time on our Web Servers and other Linux based systems.
To those of you that have done this G5 repair I'm sure you are snickering about this time.
We were able to locate a new power supply and had it over nighted. To those of you ready to tackle the job here is our experience:
1. Remove the fans, both the front and rear.
2. Pop off the covers on the processor heat sinks so you can get to the allen head screws that hold the processors in place. ( Yes you have to pull the processors to remove the power supply) Make sure you have a 2.5mm allen head driver with at least a 5.5" shank so you reach the screws that hold the processor in place.
3. Mark the processors, A or B, top or bottom, you want them going back in the same slots.
4. Once you have loosened the screws (leave them in the posts, no need to pull them out) pull each processor straight up. Don't wiggle them or rock them, you don't want to bend any pins.
5. If you have the lower RAM slots filled I would pull the RAM, you'll need the room to get the Power Supply cover out of the way. Again be sure to mark the modules so there is no mismatch.
6. Remove the 2 screws that are holding the PS cover in place. I found that if you lift the front of the plate up and then slide it to the front, it clears the case. It IS tight to remove this cover, be careful not to jam it against the logic board. I also found its flexable so I could torque it a little from the middle to pull it out.
7. Remove the 4 screws from the bottom of the case, they hold the PS in place.
8. Remove the 3 connections from the logic board.
9. I found that with the case laying on its side, I tipped the power supply up horzontialy towards the top on the case, and then it lifted stratgit out.
10. Pop the new in the samew way the old one came out, and make the connections to the logic board. The front connection is a pain because the pig tail isn't all that long, so you end up doint it with one hand.
11. Reinstall the 4 screws on the bottom of the case, and reinstalled the PS cover using 2 screws.
12. Put you processors back in place, first the top and then the bottom, be careful here, you don't want to bend any pins, line up the posts and push straight in, you'll feel it seat itself. Tighten up the screws. Don't overtighten these they need to be snug.
13. Replace the ram, and the top covers for the heat sink and your fans.
At this point you should be all set, replace the dust covers close up the case and fire it up and all should be well.
We of course cleaned up the case before replacing the PS and we DID run into a problem with the top processor not seating properly. When the machine booted we got to a gray screen and that was it. I suspected a processor wasn't seating properly and when I pulled the top processor I found a piece of dust between the pins. Of course when I removed the dust I bent a pin, and spent the next 20 minutes realigning it it with a safety pin. I know bad idea but I was desparate. We got incredibly lucky with the alignmnet and the machine booted and has been running like the bear it is.
We have built and service a lot of machines over the years, and I have to tell you pulling processors to change a PS just doesn't make a lot of sense to me. I also have to take issue with the unavailability of information from Apple. I KNOW they want you to use their services but not all of us are in the position to lay out 250 for a PS and another 300 for labor and wait 10 days:)
I was in touch with a couple of people I know that stated when they pull the PS they also pull the logic board. I didn't find that to be necessary in our situation.
Like always when you open the case take the necessary precautions with static discharge and electrical hazards.
Hope this helps somebody out there, I know there wasn't a whole lot of info I found for the task in detail.
G5 Mac OS X (10.4.8)

You really need to call Apple and ask about your particular machine. Sometimes Apple will still honor the extended warranty if it applies, even if you're beyond the expiration, and your machine might fit a narrow set of circumstances that doesn't apply to everybody else.

Possible to lock shut down sequence?

Hi, I was wondering if it's possible to prevent my computer from shutting down (either with a password or some other form of security). My roommate continues to turn off my computer as a prank (I've tried reasoning) but they consistently do it. I was wondering, can I put a lock on the shut down sequence so they can't turn off the computer without me?

Do you log out of your account when you're done using the computer?
Setting the computer to request authentication (username+password) when it wakes from sleep or screensaver could help.
However, if your roommate physically forces the machine to shut down by holding the power button or removing the cord, there's nothing you can do. You'll want to check your computer's hard drive for errors often, just in case.
You may want to start shutting it down yourself when you leave.
~Lyssa

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Hi Everyone,
Where on earth do you find a power supply replacment for the Mega651. I've tried tracking it down from FSP Corp. (manufacture sticker on supply) and countless websites but can't find one anywhere...Anyone?
Thanks!
Steve

Hi Pico,
have a look at this post :
The definitive(?) guide to replacing the MSI Mega PSU
it may be of use

Final Cut Express Shuts down right after capturing

Hello all:
I am using FCE 3.5. I have used this for about a year now and I have developed a problem with FCE shutting down right after I hit escape. I run a lab for a university and it is doing it on ALL of them so it isn't an isolated incident. I repair permissions, reset the PRAM, trashed the prefs and I don't know what else to do.
I am running imac G5's using 10.4.11 and the new imacs running leopard. Both sets are doing it.
Any help would be appreciated since our classes start soon.
Thank you.

Can you tie the crashes to a recent event: a software update, a new piece of hardware? What else is connected to the computers?
(You have, of course, triple-checked that the FCE Easy Setup matches the footage you're capturing, yes?)
After the program crashes, is the captured footage saved?
What's the lab setup? Does each student have an individual user account? On each computer?
Lots of questions, I know...
Here's a suggestion:
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Illustrator and Indesign shut down immediately after launching!!
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Hi Taranwadikwa,
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- Dave

Abnormal Shut-Down Sequence After Power Supply Replacement ???

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