IMac G5 17" power light question

Should it be on all the time when the computer is in use, or only lit, slowly pulsing, when sleeping?

This is getting confusing. I thought that was so also, but found this kb article after posting
http://support.apple.com/kb/HT3016 which would seem to indicate otherwise. Reason for question is that after getting computer back from (problematic) repairs, I noticed no power light when in operation. Only in sleep mode. The tech thought this was normal. Now I don't know what to think.

Similar Messages

IMac G5 blinking power light / won't turn on

When my iMac G5 is hooked up to power, the power light (front bottom right panel) faintly blinks once every 2 seconds or so. The monitor is not on at all, and the computer does not appear to be running (no sounds).
All other devices hooked up to that particular power outlet are working fine, and pressing the power button does nothing. Holding the power button down halts the blinking, but when I let go the blinking resumes.
I have also tried removing all devices attached to the computer, including the keyboard and mouse.
This machine was working fine on friday, but when I came back into work today (monday) the machine was 'off' and nothing I do seems to cause any change.
Very confused, any help appreciated.

It may be that your Power Supply Unit is failing, look at the suggestions here, try them and if nothing works, call Apple. If you have a Rev A, you may qualify for the Repair Extension Program. (sorry to assume you didn't know about sleep, sometimes very basic things are not known to posters).
Please let me know how you make out,
Miriam

IMac G5 Pulsing power light

There was a download to correct a bright pulsing power light on the G5. I can not find it anywhere. Can someone help.
Thanks
Mac OS X (10.4.8)

Abbeycat - You got an answer to your question and Apple have suggest the following:
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Blank screen on my iMac and blinking power light.

Earlier today, my 20" iMac screen went completely blank, but I could still hear the fan working, so I'm pretty sure it believes itself to be on. I tried to restart it by holding the power button down, but it idn't work. Now, I can still hear the fan working, and the power light is blinking continuously. Can anyone try and help me out?

The same thing is happening to me right now. For reference, I posted this thread as well
http://discussions.apple.com/thread.jspa?threadID=1585907&stqc=true
Did you get it fixed?

WRT54G v5 w/blinking power light connected to an iMac

Hi-
Most of the solutions I've seen related to flashing power lights on the router involve fixes via firmware upgrades off a pc.
I'm on an iMac os 10.6.7. The WRT54 used to work as a wireless modem a couple of years ago. Tonight, it doesn't. power light blinks. Can't access any webpage interface for the thing. Reset, power down, computer restart, cable modem turn off don't change anything.
Is there anything that can be done other than tossing the linksys? If that is the only option, are there wireless routers more suitable for a Mac?
Thanks
Ralph

I think your router is not responding.
Connect only the computer to the Ethernet port 1 on the router. Check the IP address on your computer. If you are getting a valid IP address like 192.168.1.xxx then try to ping the IP address of the router 192.168.1.1.
If you get auto configuration IP address like 169.254.x.x then assign a static IP address to the computer ( 192.168.1.10 subnet mask 255.255.255.0 and gateway 192.168.1.1 ) . Try to ping the IP address of the router and see if you get replies.
If you are not getting replies from the router then I think you will need a new router.

IMac black screen and flashing power light

I installed several system updates on my 2007 iMac last night, running OS 10.7, and today I can only get a black screen with a flashing white power light when I try to start up. My computer will neither start up nor completely shut down, and my wired keyboard won't communicate either. Help!

Power down, unplug if needed.
"Try Disk Utility
1. Insert the Mac OS X Install disc, then restart the computer while holding the C key.
2. When your computer finishes starting up from the disc, choose Disk Utility from the Installer menu at top of the screen. (In Mac OS X 10.4 or later, you must select your language first.)
*Important: Do not click Continue in the first screen of the Installer. If you do, you must restart from the disc again to access Disk Utility.*
3. Click the First Aid tab.
4. Select your Mac OS X volume.
5. Click Repair Disk, (not Repair Permissions). Disk Utility checks and repairs the disk."
http://docs.info.apple.com/article.html?artnum=106214
Then try a Safe Boot, (holding Shift key down at bootup), run Disk Utility in Applications>Utilities, then highlight your drive, click on Repair Permissions, reboot when it completes.
(Safe boot may stay on the gray radian for a long time, let it go, it's trying to repair the Hard Drive.)
If perchance you can't find your install Disc, at least try it from the Safe Boot part onward.
If 10.7.0 or later...
Bootup holding CMD+r, or the Option/alt key to boot from the Restore partition & use Disk Utility from there to Repair the Disk.

IMac powers up fine. Wireless keyboard and tracking pad not recognized. Power lights blink twice, repeatedly. Any ideas?

My iMac was off during a recent thunderstorm. When I power up the computer all is fine. However the wireless keyboard and track pad are not recognized by the computer. Their power lights blink twice, go off, then blink again. Any suggestions?

Turned out that I had to disconnct the keyboard from the new iMac in order to show in the old iMac.

IMac G5 17" - Power Issue

Hi,
I have an iMac G5 17" with light sensor, recently it had turned itself off, I went to power it back on and nothing happened.
I have gone through the procedure to reset the SMU and I have also tested another PSU. Capacitors and components appear fine, nothing out of the ordinary.
When iMac is plugged in and power button is pressed, diagnostic LED #2 turns on for a split second, again I have tested this unit on another perfectly working PSU, the original PSU from the unit has also been tested in another G5 iMac left on for a whole day and no issues occurred.
Can anyone help?

Hi luna-nz and welcome to the forums.
This will probably sound silly , given the tests you have already done, but is there any possibility that the "collar" on the power cord where it enters the machine has become a little displaced? When these computers first came out we were seeing numerous situations where a slightly displaced "collar" could result in sudden power drop outs because the power cord wasn't seating properly.Simply pulling the collar further up the cord, and then making sure the plug itself was firmly seated, would rectify the problem.
A long shot, I'm sure, but worth checking if you are sure the power supply unit itself is not the issue.
There were also some situations where the power switch itself could fail, leading to sudden power drop outs and difficulty restarting. To test this, if you have access to another identical iMac (as it appears you do) , you could simply try swapping the backs on the two machines.
Cheers
Rod

Home hub 3 orange power light and speed problem

Hi, I have posted this again as I think I posted in the wrong place last time being new to the site!
Hi, I have a Home Hub 3 Version A. Orange power light constantly on.
I came across this site while looking for answers and quickly registered to post this.
I have tried all suggestions including a neighbours power supply (Version A as well) to no avail.
Background to help with replies.
I have been had option 3 since 2003.
In that time I have had
H H 1 (failed)
H H 1 replacement (failed)
Netgear – weak wireless and does not like Vodafone suresignal
H H 2 constant dropouts
Back to Netgear
H H 3 Version A lasted 24hrs
Back to Netgear.
For the last 5 months we have been having line problems, regular dropouts.
BT Openreach have been out 4 times, changed virtually everything and traced line back to Exchange.
The last engineers conclusion was line at my home is capable of 12meg and was being throttled as he called it to around 6meg.
He suggested trying a H H 3 and contacting BT for line to be opened up.
For two reasons.
With a faster speed line fault would be easier to locate.
Line was capable of so much more.
Several LONG calls to BT answering all the format questions first, (to be fair 0800 so no cost) each time first being told my speed was within contract stated speeds, then after my explanation regarding BT Openreach engineers views I was told an engineer would be contacted to improve line speed.
Needless to say nothing happened.
The frustrating point being each new call generated the same response – NOTHING on their system to show a previous call had been made by me.
Hence the reason for this post.
I feel the helpline, whilst free, achieves nothing except a long time on the phone answering repetitive questions answered before.
I am loathe to phone again as I will undoubtedly be told there is no record of any previous calls or action and I want to resolve the H H 3 Version A problem so it can be used.
Any help appreciated

Hi John46 and thanks for the reply.
Can't try H H 3 it is dead.
i saw somewhere on the forums when i first found you about a route that simplifies action from BT.
Have looked since and cannot locate it.
Do you know where it is?
With the Netgear which I have no option but to use,
ADSL on reports
Multiplex VC-BASED
VPI 0
VCI 38
Speedtester result............
1. Best Effort Test: -provides background information.
Download Speed
6667 Kbps
0 Kbps
7150 Kbps
Max Achievable Speed
Download speedachieved during the test was - 6667 Kbps
For your connection, the acceptable range of speeds is 2000-7150 Kbps.
Additional Information:
Your DSL Connection Rate :8128 Kbps(DOWN-STREAM), 448 Kbps(UP-STREAM)
IP Profile for your line is - 7170 Kbps
2. Upstream Test: -provides background information.
Upload Speed
367 Kbps
0 Kbps
448 Kbps
Max Achievable Speed
>Upload speed achieved during the test was - 367 Kbps
Additional Information:
Upstream Rate IP profile on your line is - 448 Kbps
Wall socket - tested by engineer and renewed AND RF filter fiited, just 'incase'.
Noise test also done.
Thank you for pointing me to the test, even if I had a game with Java before I could use it (New PC)!
As I read the results I am under 8meg. Openreach engineer said line was being 'throttled' as it was capable of circa 12meg this distance from the exchange. I am meant to be on 20meg contract.
Chhers,
I will watch out for a reply.
Any pointers on the H H 3 complaint route would be appreciated, i am begining to think I imagined it!!!
ps Where is the rating star? I can't see it here ?

No startup: blank screen, power light on, fans normal speed

iMac G5 2.0GHz, 2GB RAM, 160GB HD, OSX 10.5, 17". Bought in October of 2005. Two matched Samsung 1GB RAM chips installed quite some time ago with no problems.
While it isn't the iSight model, my iMac has done the blank screen with fast spinning fan thing a few times, but it always recovers after I turn it off. Here's what happened:
iTunes is playing, I pause it using the Play/Pause button on the new wireless aluminum keyboard, it sits for a while and the screensaver comes on. I press the Play/Pause button on the keyboard again, the screensaver freezes and the fans spin up to maximum speed. I hold the power button down, it shuts off, I turn it on again and get nothing. It now powers up to a blank screen, fans at normal speed, the power light stays on, and the CD drive never makes its little startup noise. Holding the power button down does nothing, I have to pull the power cable out to turn it off. The only thing it has done differently since this happened is one time the power light didn't come on, otherwise no change. I also tried all of the different key combinations on startup (using the USB keyboard) and get no response, so no target disc or safe modes. Also, the CD drive won't accept any discs, so I can't start from the system discs.
I don't want to pay for any expensive or major repair work since I was going to get a new iMac this Fall anyway. If anybody has any clever do-it-yourself tricks I'm wide open to them. Otherwise it looks like I'll just get a hard drive enclosure kit and get all of my stuff off that way.
Help please!

First, you may still be eligible for one of Apple's Repair extension programs also, try resetting the SMU.
Let us know what happens,

G3 imac DV SE power up problem

I've run out of ideas on this one, so any help or suggestions are greatly appreciated.
I have an intermittent power up fault with an imac dv 400Mhz 512Mb RAM.
On powering up via the keyboard or the main front button the power light comes on and stays green but no screen or hard drive noise goes along with it, pulling out the mains and reconnecting usually but not always allows the machine to boot and when it does manage to start up zapping the PRAM causes the machine to shut down.
When trying to install Panther from MacOS 9.2.2 the machine attempts to restart but shuts down and can't be started without difficulty.
The original battery that came out was completely dead and has been replaced with a used one that has good voltage.
The only other thing that sometimes makes a difference is disconneting the keyboard and powering up from the main switch.
I have reset the PMU, and upgraded the firmware and checked the logic board voltages J9,C10 and the J7 pins and all seem very close to the required outputs (how close do they need to be?) the only thing I haven't checked yet is the F901 fuse.
Is it likely that the PAV board is kaputt? or that the keyboard is causing the problems?
I'd really like to try and get this running as I use an identical machine upgraded with a 120Gb disc and 1Gb RAM running Tiger at my workplace that runs beautifully so I think it is worth trying to fix.
Or shall I give up on it?
G3 Imac DV SE Mac OS X (10.3.4)

If it consistently works with the keyboard detached, I'd switch keyboards with that other iMac to see if that's the cause. I would also buy a "new" battery instead of trying to re-use a used one. Another good test is to try it with one 256MB module at a time, to see of if one of them is faulty. Sometimes, RAM modules that worked fine with Mac OS 9 do not work with Mac OS X.

System showdown, but power light still on.

Hi all,
i just buy ideapad s510p yesterday, then got problem. i showdown my laptop, screen is off, but power light still on. i trying few times, but still same, then i leave it 12 hours, power light still on , and hardis still runing.who can tell me how i fix this problem and why will have this kind of problem??

Dear Edwin
Welcome in lenovo community
If you mean the power button still gives a light so my be the machine has been entered the sleep mode , if you mean the indicators just let me know which indicator are giving the light
Thanks
Alaa
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WRT54GS v1.0 Firmware needed, Blinking Power Light

No download available and none available via Linksys Live Chat or FTP and having spent the best part of the week trying to find relevant firmware on other forums I decided to come here to get answers to the following questions, hopefully from version 1.0 experienced owners or not.
#1. Can the firmware of version 2.0 and 3.0 be reduced to flash version 1.0?
#2. When diagnosing the blinking power light issue by connecting directly to the router and the network card using "ping -t 192.168.1.xxx" which network address do I use, 192.168.1.1 or 192.168.1.2 to 2xx?
I get a reply using 192.168.1.1 but I'm not sure that helps when using the TFTP Utility if it's the wrong address on my Laptop to ping?
Anyway I'm stuffed without the right firmware anyway so I need your help with that first please, anyone with UNBRICKING knowledge.
All Help Much Appreciated

Thanks Stephanie67, below is what I found. It appears to be the correct firmware by the description anyway. Do you know if this firmware is loaded the same way via the web interface like the firmware provided by Linksys?
WRT54GS_4.71.4.001_fw,2.bin
Description:
GS v1-3
Download
Filename:
WRT54GS_4.71.4.001_fw,2.bin
Filesize:
3 MB
Downloaded:
156 Time(s)
Thanks again Stephanie67, you Rock!!

Imac ISight A1145 diagnostic light 4 is solid red

Greetings all.
Please help trubbleshoot this problem if possibe.
ImacIsight 20' A1145.
I replaced the PowerSupply all wnet good.
Problem now is as follows.
Diagnostic Lights..
Plugged in. Ok..
Light 1 is now Green and Solid on. (power supply seems to be working)
when the Power button is pressed.
Light 2 will Light Green for less than a seonc
the White POWER Light lights for less than a second.
Light 3 Never Lights
Light 4 Instantly Lights RED and the fans shut off.
my thoughts are that somehow the logicboard is not getting a signal from the Fans?
the processor / logicboard overheated and died.. needs replacement?
Am I overlooking anything?
restult. Lights 1 stays green solid
Light 4 stays red solid .. untill unplugged.
Any suggestiongs?
Thank You
Saraba

Hmm.. ok .. I guess I didnt explain to well in the first post.
At first diagnosis on this Imac it was D.O.A. ( dead.. no power lights .. no diagnostic lights.. No nothing. no flash of any lights. no chime.. NOTHING.. Dead..
Replaced power supply. Properly!!
Now with the NEW Power Supply..
The computer will now show these diagnostic lights..
Light 1 is now Green and Solid on. (power supply seems to be working)
when the Power button is pressed.
Light 2 will Light Green for less than a seond
the White POWER Light lights for less than a second.
Light 3 Never Lights
Light 4 Instantly Lights RED and the fans shut off
the end result is...
Light 1 stays green solid
Light 4 stays red solid ..
untill unplugged.

Compaq presario SR1504x green power light

hello
My compaq power light has started blinking every 2 seconds. The computer is running fine. Starts, loads up fine, other words it works good. Any idea way its doing that? I have not installed or changed anything,
thank you
This question was solved.
View Solution.

Hello dotdot65,
A blinking green light could mean it's getting close to time to replace your power supply.
However, let's try this troubleshooting step
1. Turn off the computer and unplug it
2. Hold down the power button for 10-15 seconds
3. Reconnect the power supply and boot up
This will kill all the power to the motherboard and completely discharge it, let me know if the light is solid green after that.
If I have helped you in any way click the Kudos button to say Thanks.
The community works together, click Accept as Solution on the post that solves your issue for other members of the community to benefit from the solution.
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IMac G5 17" power light question

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