Another Dead iMac - Flashing LED!

I have an iMac 700 which recently died. The display froze and upon reboot the screen would only show a faint raster - no chimes, no grey screen, just a faint repetitive buzzing noise. Most curious, though...the power button LED was flashing: 4 short flashes followed by a long flash (or vice versa). Anyone have any idea what my dying iMac was trying to tell me?

Usually, a flashing LED pattern means bad memory. But not in this case, as your memory was fully working before the problem occurred.
Typical problems that will cause this kind of symptoms, in order of things to try:
1. Replace the mainboard battery and then reset PMMU and clear PRAM contents. See if this clear it up.
2. Leave it unplugged overnight and see if you can get it to boot first thing in the morning.
3. Follow the Apple troubleshooting guide and test for voltages, to ascertain whether it is a power supply problem.
4. Repetitive buzzing noise and no video suggests it could be the iMac 'flyback transformer' problem. My understanding is that affects only the early (233-500 MHz) versions of the iMacs, but I could be wrong. Search the forum for more details about the flyback transformer problem, which is a monitor problem that I am told is expensive to fix.

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Dead iMac, yellow LED. Motherboard?

Hi. I have a big problem with my iMac 350. When I want to turn my mac on it does not power on. I have changed battegy, resetted PRAM and nothing. This is weird because When I plug the cord I can see LED (near the DIMM slots) turns on and about half second later it turns off then power LED turns on. It has orange light. I can also hear that monitor "works". Is this problem with motherboard?

cavenba...
I very much doubt you have the same problem a Slot Loading iMac 350Mhz model would have concerning an LED in the DIMM memory bay.
Your touching story here reminds me about... The Boy Who Cried Wolf!.
WOLF!
...Ron

How to get data from hard drive in dead iMac?

I have an old slot-loading iMac (350Mhz G3 blueberry) that just died, probably a dead power supply or something. Won't turn on at all. I don't care about restoring it, I just want to take the hard drive out and grab data from it. I've found instructions for removing the HD ... but any tips on the best/cheapest way to hook it up to get data from it? It's EIDE I believe from what I've read so far. Thanks for any help.

Hey Richard.....Thanks for the reply to my question about my wife's dead iMac.....
Her iMac had been acting up lately, mostly to do with her Outlook Express freezing up in OS9. I dunno if OS9 was freezing or if the application was failing. Regardless, I would have to quit OS9, restart Outlook which at the same time restarted OS9. All would be fine for a while, a day or two and then the scene would repeat itself. But I think that issue is separate from the iMac being "dead". Often we have power outages in the area, more than we should. I had the iMac plugged into a battery backup, some APS product I think it is. I believe it is only good for less than an hour as we have other devices drawing on it too. Most of our power outages are of short duration, just enough to be aggravating, sometimes having to reset clocks, etc...And a couple times, I would have to reset the time and date on the iMac so this told me that the PRAM battery was below minimum voltage. But the iMac would ALWAYS restart, even with the low battery. But the most recent outage, about one hour duration, did in the iMac, somehow or other. I do believe the battery backup basically fully discharged. So I removed the battery, could not find a new battery locally so I drove to the big city and paid the local Apple service dealer a visit. I got ripped big time price wise, embarrassed to say. So I get home, put the battery in the holder, depressed the CMU reset, the powerbutton illuminated as did a green LED by the memory modules for less than three seconds and then quit. I also heard the HD trying to spin up and a high voltage THUMP which I assume is the CRT trying to ignite. If I unplugged the iMac, removed the battery, plug in the power again and hit the power button, the iMac would repeat the same short on period and then quit. So it did not seem to make any difference if there was a battery in place. I read somewhere to pull the battery, pull the AC cord, hold down the power button to dump any current (?) and let the unit sit for 24hrs. After that length of time, I was supposed to replace the battery, depress the CMU reset, wait ten seconds and then feed it AC. Well, when I pressed the power button, I heard life for maybe five seconds, maybe a second longer, then a beep and then it shut down. I pulled the AC cord, pulled the battery, re-inserted the battery, depressed the CMU reset, waited a few seconds, plugged in the AC cord, depressed the power button and I am back at the under three seconds of "power-up" and then nothing, dead, no beep, nothing. I think maybe it is a waste of time trying to mess with this unit, looking for a newer iMac on eBay, the snowball series with the 17" LCD, might be time better spent. Hate throwing stuff away, that's why I am up to my ears in junk, maybe u know that scenario. The wife likes my 19" ACER LCD screen, hooked up to this old dual 800mhz, though she dislikes the noise and the tower. But we both agree the large LCD screen is much easier on our aging eyes than the old iMac CRT. Anyway, I appreciate your help, always GREAT to correspond with an Apple fan.....John Bauer

Semi Dead iMac

I just inherited a semi dead iMac. When booted it displays the OS 9 icon and never goes any further. The previous owner says he was running 10.3.X
I ran Disk Warrior. It completed and the system was rebooted. The drive spun up but the screen remained black. The white LED lit up. I rebooted and held the mouse down to eject the DW disk. The drawer wouldn't open but I was able to manually eject the disk.
I rebooted and attempted to reset the PRAM. I only got one chime. I powered down and unplugged the power cord for one minute. Plugged power in and attempted to reset PRAM with no luck.
I reset the PMU and powered up. The drive spun up, the screen stayed black and the white LED remained dark.
Anyone got any ideas?
TIA,
Mike
G4 400, iBook, G5 iMac, Pismo PB, 1G iPod Mac OS X (10.3.9) F87, Crappy Toshiba Laptop, Trek Y66, Ludwig Vistalites, Birth. Drums. Death.
G4 400, iBook, G5 iMac, Pismo PB, 1G iPod Mac OS X (10.3.9) F87, Crappy Toshiba Laptop, Trek Y66, Ludwig Vistalites, Birth. Drums. Death.

If you have the disks, I'd try installing a fresh copy of OS X. Or running Apple Hardware Test.
Have you tried booting in verbose mode (cmd-v). You might get more a more specific error that way.

I wish to remove my hard drive from a dead iMac, and have it place into an external case. Any good sources for the person to do the work?

I have a dead iMac (mother board), intel duo.I wish to remove the hard drive and made into an external hard drive (hopefully being able to read the contents). Any recommendations as to whom I should go to to do the work?

AASP Locator

I had a 'dead' iMac repaired and it needed a new HDD & graphics card, the repairer installed OSX 10.6.8 and i now need to install other software but I am being asked for 'User' password so I may do this, I've no idea what this will be. Help please.

I had a 'dead' iMac repaired and it needed a new HDD and graphics card, the repairer installed OSX 10.6.8 and i now need to install other software but I am being asked for 'User' password so I may do this, I have no idea what this will be. can anybody help please?
<Personal Information Edited by Host>

On looking at the secure.log on the iMac with OSX10.6.8, I see these entries at each attempt to scp into the iMac:
Dec 29 11:06:20 molika sshd[7248]: in pam_sm_authenticate(): Failed to determine Kerberos principal name.
Dec 29 11:06:26 molika sshd[7246]: Accepted keyboard-interactive/pam for prowat from 137.110.243.132 port 35571 ssh2
Dec 29 11:06:26 molika com.apple.SecurityServer[26]: Session 0x236a14 created
Dec 29 11:06:26 molika com.apple.SecurityServer[26]: Session 0x236a14 attributes 0x20
Dec 29 11:06:27 molika com.apple.SecurityServer[26]: Session 0x236a14 dead
Dec 29 11:06:27 molika com.apple.SecurityServer[26]: Killing auth hosts
Dec 29 11:06:27 molika com.apple.SecurityServer[26]: Session 0x236a14 destroyed
I don't know what to make of this.
Peter R

Using a hair-dryer to resurrect a dead iMac CTR!

I visit this forum often enough to see how many people are finding it hard to get their old (but perfectly usable) iMac CTR to work again.
Well, after putting in a new battery, my good old iMac G3 400 SE slot loader was still not booting. I knew everything worked. I turned it off for a day, and then it wouldn't boot up again. All I got was a green flicker as I tried to power on.
Well, low and behold, I used a hair-dryer to warm up the inside of the system, and it booted up fine!
Hopefully this might work for some others with presumable dead iMac G3s. But the question is why??? If I put the system to sleep I get the same "playing dead" iMac and have to wake it up again with the hair dryer. Any thoughts?

Thanks for your input. Yes I did check a number of things, including all connectors fitting ok, but maybe I missed something. I did try swapping out even the logic boards and hard drives, to no avail. My guess it is something with the monitor itself, since the other components work fine, and only when the monitor is heated enough will it start.
I have no problems with the computer otherwise, but I hate to waste electricity - it just can't sleep or it will play dead. Thanks again.
I hope this might help others who might have the same problem thinking it is something wrong with the computer, when it is really the monitor. Go get those hair dryers revved!

Use dead iMac Display as monitor?

I have a dead iMac (mobo fried) and was wondering if there is any way I can extract the display panel, and use either a bought or DIY/hacked adapter to use it as a standard monitor.

K Shaffer wrote:
This topic has been well-played here; the replies
given to several inquiries have been researched.
I'm not an expert, only having owned, repaired &
donated to charities, some 140 Macintoshes.
And I've not been heavily into dissecting my four
iMac G4 computers with 17" LCD displays. But
I do know the computer with a failed logicboard
will not support the display; the graphics or video
processor is integrated, and the panel has only
a few of the necessary support circuits with it
above the chrome arm in the panel's case.
There are a few ways of integrating a different
fully self-contained display into the dead iMac
case and perhaps use the existing LCD or an
other LCD and put additional circuitry into the
base of the iMac G4 instead of the dead LB.
And the earlier reply was essentially spot-on.
Other discussions on this topic are most likely
to be found in the proper forum for iMac G4,
Apple - Support - Discussions - iMac G4 flat panel:
http://discussions.apple.com/category.jspa?categoryID=137
Later G5 & Intel-based iMac cases could be
used, empty, to support an entire complete
display of similar size; and the circuits likely
would fit if the case had room enough, empty.
An apology would be in order, if you came in
to a retail establishment and talked to a tech
with a determined to fail attitude like that.
Good luck & happy computing!
{edited to add correct iMac G4 forum link}
My attitude was like that because i know what I am talking about. I now it is not a display. That is what bugged me. he talked to me like I had no idea what I am talking about. he also did not provide an answer like you that was well thought out and seemingly well researched, he said "I guess." I will, and have accepted, that this is not really possible. It was not his answer, it was his attitude towards the question. and just a BTW, I am talking about the intel imac. The white one, not the g4.

Can`t make it start, continuously flashing led

Hi, I have a Power Mac g5 2.0ghz with 4 memory slots. Sudenly I can`t make it start. I get continuosly flashing led without hearing the start bep.
I try:
1) changing the ram
2) changing video card
3) reset PRAM
4) reset SMC
5) cleaning the Ram with rubber
6) using a hairdryer in the motherboard
7) disconnecting the CD Player and Hard Drive
Some times (1 in 20) I can get the machine to start, but when I turn it off it does the same and I get the flashing led.
Power light status
What it means
On and solid
Computer is on and running
2 flashes, pause
No memory (RAM) is installed
3 flashes, pause
Incompatible memory (RAM) is installed
4 flashes, pause
No good DIMM banks detected
5 or 6 flashes, pause
Contact Apple or an Apple Authorized Service Provider
I should contact a service?????
Thanks

I should contact a service?????
Hello, sadly Apple no longer works on G5s, nor has any parts, you might find an independant AASP that might in your area.
If you're sure the RAM is good, try the Hair Dryer trick...
http://discussions.apple.com/message.jspa?messageID=13240047#13240047
https://discussions.apple.com/message/15223603#15223603
https://discussions.apple.com/message/15499912#15499912
https://discussions.apple.com/message/15613068#15613068
https://discussions.apple.com/thread/3270112
https://discussions.apple.com/message/16053892#16053892
No power light at all...
https://discussions.apple.com/thread/3692775?tstart=0
It can show on any G5, and even many other computers & electronic devices of the period.
http://www.macintouch.com/reliability/pmg5.html
http://lowendmac.com/ppc/power-macintosh-g5.html
And see this last one in particular...
https://discussions.apple.com/message/16781690#16781690
Heat gun better...
https://discussions.apple.com/thread/3916312?tstart=0

Buying a new imac - Flash and Photoshop

I'm getting ready to buy a mac. I use it for on the side freelance, mainly using Flash, Dreamweaver and Photoshop. I can't decide whether I want to get a 20" PowerPC imac, a 20" intel imac or just suck it up and get a G5 tower, along with a flatscreen. Currenly I use an old G4 (400 megaherts, 1 GB of RAM.
Basically, I'd like to know how much faster a tower is to the imacs, and how well I can use Flash with Rosetta. I'd like to have really good performance, but don't really want to drop $3,000 on the tower/monitor, and am hoping that the powerPC imac has good performance on these applications.
So, these are my options:
-PowerPC G5 Tower, 2 GB RAM, 256 graphics card
-PowerPC iMAC, 1.5 GB RAM
-Intel iMAC, 2GB RAM, 256 graphics card
Thanks for any replies,

I'm using 20" intel imac with 1GB ram and 256MB
graphics card. Compared to my 1.33GHz/768MB G4
powerbook:
Photoshop CS runs faster on the imac
Flash 8 Pro is way faster and more responsive on the
imac
Dreamweaver 8 runs about the same on the
imac
12" pb g4 1.33/768,
20" imac core duo 2GHz/1GB Mac OS X (10.4.4)
you are running Photoshop and Flash in emulation mode, right? and its way faster than your powerbook? is it stable?
Mac OS X (10.3)

Which consumes iPhone 5's battery faster? Using text tone or not but using the flash led notication alert?

Which consumes iPhone 5's battery faster? Using:
1. text tone
2. no text tone but using the flash led notication alert
Please reply.

Sounds to me that there is a process stuck and that is what is causing your battery issues. You say that you have restored to factory settings twice in the last 6 weeks. Were those restores from a backup, or a restore as new? If you restored to a backup and the issues are still there, then there is something wrong in your backup. Try restoring the device as new and not add anything to it right away and see if that improves the battery life.
I have a 5S with a push account for work and am dealing with email constantly during the day. I use my phone for upwards of 16-18 hours of the day, including web browsing, iMessages and phone calls. My battery is usually around 65-70 percent at the end of the day, which is only about 2-3% per hour of usage.
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Rapid green flashing led on airport extreme

I have just plugged in my Airport Extreme after not using for a year and it has a rapid green flashing led status light, the Airport utility does not find it so I assume that there is a hardware problem? Does anyone know what a rapid (very) green flashing light means?

Unfortunately, a rapid green flashing light is usually a symptom of an internal power supply failure. If you have an Apple Store in your area....suggest that you take it to them to let them have a look.
Otherwise, you can contact Apple Support directly at http://www.apple.com/support/contact/

Flashing led

Hey, i'm new to Labview and i have a problem to do... i'm finding a little problem in creating a flashing led :
If you have chosen “flashing” from the switch, then the LED should light up for a time equal to the value of the “ON TIME” control and then the LED should turn off for a time equal to the value of the “OFF TIME” control.
any help will be very much appreciated
regards,
karamdeek

Karamdeek wrote:
is it possible to do it using a flat sequence containg the wait time ?
Flat sequences are frowned upon as there's almost always a better way to solve sequencing problems with proper program flow.
I think this part of your problem is to help you learn about shift registers and structures within structures. These basic skill are required when you want to control a logical flow of events.
I'm probably giving away too much here but look at the pic and try to figure out what is in the other cases that make this VI work. Once you do, break it down into small steps or draw a flow chart and see how the labview structures mimic the decisions you have to make to cause the LED to flash as your requirements specify.
Good Luck!
Using LabVIEW: 7.1.1, 8.5.1 & 2013
Attachments:
LEDflash.JPG ‏49 KB

Flashing LED problem

I'm a new blackberry user. And I accidentally wiped my phone. And after that, my flashing led at the upper right of my phone won't blink anymore. Before I accidentally wiped out everything, it was still blinking. Does anyone know how to turn it on? I looked everywhere in the option section of my phone but I can't find it.

Hello Kababayan!
Welcome to the Community
The LED notifications are not anywhere in options as they are placed under Profiles. Edit the Profile and go to Change Sounds and Alerts and inside each would have a setting for LED Notification.
Goodluck and Enjoy
Ron
Click "Accept as Solution" if your problem is solved. To give thanks, click thumbs up Blackberry Battery Saving Tips | Follow me on Twitter

USB port Working for my Wireless mouse but not working for another Devices like Flash Memory ?, USB port Working for my Wireless mouse but not working for another Devices like Flash Memory ?

USB port Working for my Wireless mouse but not working for another Devices like Flash Memory ? Anyone can help me plz?

Hi, is this a question" Post?
or are you just offering an insight into your Mouse Issue?
Generally and at times we all have little idiosyncrasies appearing with the running of our Macs.
I use the same Logitech BT with my MBP. MB & iBook..(not at the same time) Only ever had one issue
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Another Dead iMac - Flashing LED!

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