FireWire fried by power cut?

Someone switched off the power to my iMac the other day. Since I've rebooted:
a) System Profiler shows no awareness of FireWire ("Unable to list FireWire devices" in red)
b) Every boot takes about five minutes, 3+ of which seems to be spent waiting for a response from the FireWire socket (the logs show a 3-minute gap followed by a line that goes something like this:
"/usr/lib/exec/hidd: Timeout waiting for IOKit to be quiet")
c) if it's idle long enough to go to sleep, it goes into a kernel panic (the last line in the log before the panic says
"kernel[0]: IOPMSlotsMacRISC4::determineSleepSupport has canSleep true")
b) looks connected to a), but I can't see any connection with c) (apart from the reference to IO).
This is a last-generation PowerPC G5 from 2005, recently fitted with a new logic board after repeated kernel panics (where 'recently' = 'over 90 days ago'). I'm wary of doing anything too drastic with it, as my TM disk and my alternative boot partition are on a FireWire-attached drive & are hence both inaccessible precisely when I'd most like to see them. I have tried flashing the PRAM, though - it made no difference at all.
Any thoughts on what's going on and what (if anything) I can do about it?
Phil

Sut dow, remove all peripherals including keyboard and mouse, remove the power cord from the back and leave it off for a couple of hours, overnight if you can, then reconnect and restart.
Let us know if that helps, you would be resetting the firewire bus.

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Secondary Socket Fried by Power Surge/Cut?

Hope someone may be able to help me on this one. Wednesday night had a power surge/short power cut here and discovered my second socket was dead. Thought this would fix itself but have found today that the socket is still dead.
Wouldn't normally be bothered but my Sky box is wired into this socket and obviously this is soon going to cause me problems as it's part of my contract to have the box connected to a telephone line (don't use the socket for anything other than Sky and an old telephone for contacting the electric board when we have power cuts - have at least one a month here - oh the irony!).
Could this power surge (lights brightened and flickered before the power cut) have caused the damage to the socket? Has anyone had this problem before and been able to get the electric board to cough up if the surge is what has caused this damage?
Would appreciate any help as am sure Sky will be contacting me soon to query the missing telephone line connection.
Many thanks to the guys out there!

simplesimons wrote:
toekneem
I thought this was supposed to be a forum for people helping each other out with valid and useful advice - not being facetious and puerile. I can only wish on you the electrical outcomes I have had to suffer in the past here - I have claimed against the electrical board in the past but was hoping for sensible advice on this particular occasion. My experience with the electricity board in the past has been less than helpful if not down right evasive and lengthy. I was hoping to get advice from someone who has been in this position before so that I can make a decision based on fact not speculation!
If you have nothing useful to say, don't say it! Your tag says no to nuisance calls - suggest you try to stop being one yourself!!
simplesimons
Actually I thought it was good advice, Put In a Claim, it wont cost you anything.
As regards my as you say TAG, it's not its a sig, and may I say you should also stop being your SIG as well.
Just added you to my Block list, no point in trying to help you.
bye bye.
toekneem
http://www.no2nuisancecalls.net
(EASBF)

IMac won't boot anymore after power cut

Thanks to the great storms in New Jersey, my iMac does not boot anymore after a power cut. Does not get past the apple logo screen with the spinning wheel and keeps rebooting every 2 minutes.
I was able to mount the HD via Firewire on a host machine and the disk seemed fine.
I booted from the Install disk and ran Disk Utility - seemed fine though I could not verify the disk permissions ?
One other thing - I seemed to remember the white light (front bottom right) was blinking before during start-up. Now it goes and stays black after couple of seconds.
Help please,
Philippe

HI Phillipe and Welcome to Apple Discussions...
If you haven't done so, try running the Apple Hardware Test.
http://support.apple.com/kb/HT1509
I doubt repairing disk permissions can't help this problem. It sounds like a hardware issue.
*"I booted from the Install disk and ran Disk Utility - seemed fine though I could not verify the disk permissions ?"*
When you ran Disk Utility via Firewire, did you actually Verify the hard disk for errors?
Carolyn

My new iMac will be exposed to daily Power cuts ..........Advice Please

I am about to buy my first Apple Mac, an iMac 24 inch, a possible future problem I can for see is that here we get daily power cuts lasting between 5 minuest to 5 hours , I am planning on Buying a an UPS (uninterruptible power supply ) which I hope should automatically Close down the iMac when I am not there.
My questions are.
If I am at the computer when there’s a power cut is there a quick way to shut it down That will not cause any long term problems to the computer say if ive no applications or work In progress that need saving I just need to shut the computer down - on this PC ive got a one click quick shutdown option
If I am at the computer when there is a power cut , and the UPS gives me time to manually turn of the computer before the power totally goes off, is there a correct fast Way to go about saving documents Etc and then shut off the computer in such a way that it will not affect the computer in any long term way.
If the computer is set to sleep and there’s a power cut , the UPS should shut it down Automatically , what would happen when the power is restored , would the
computer re start it self and return to sleep mode and if this is so would there be any long term Problems associated with this regular UPS automatic shut down and computer auto re start back to sleep mode.
Does any one think that the regular power cut's syndrome may in any way affect the long term running and reliability of the computer , has any one suggestions as to what's the best way to cope and prepare for this daily power cut situation..?
Thanks .....

1. If I am at the computer when there’s a power cut is there a quick way to shut it down...
In the top left corner of Mac OS X is an Apple menu available in almost every app you may be using with a Shut Down command. Mac apps are written to interrupt a Shut Down to query what to do about open files with unsaved content. After you have been given the opportunity to Save or Don't Save open files the Shut Down proceeds.
2. If I am at the computer when there is a power cut , and the UPS gives me time to manually turn of the computer before the power totally goes off...
The UPS should give you more than enough time to safely save all open files, quit open apps and shut down the Mac. The quickest way to begin this process is the Shut Down command in the Apple menu. You should purchase the UPS that gives you the most time to take care of shutting down within your price range.
3. If the computer is set to sleep and there’s a power cut , the UPS should shut it down Automatically , what would happen when the power is restored...
From my own experience of a homeland with an unreliable electric supply, I personally don't see any advantage of having the Mac restart itself to only be put to sleep. Especially if the power interruption is caused by an ongoing storm which may continue to interrupt the power
4. Does any one think that the regular power cut's syndrome may in any way affect the long term running and reliability of the computer...
Macs are made to be left on 24/7, without being put to sleep. I sleep mine when not in use. My experience with Macs is they can take this power interruption in stride. Mine have for 24 years. I am grateful our federal power monopoly has improved over the years and my UPS is called upon to do its job much less frequently today!

I have an old (first generation) iMac that I still use sometimes for the applications that are on it. I was using it yesterday and unfortunately had a power cut. I went to turn it on today, and nothing at all happens. It's as though no power is getting to

I have an old (first generation) iMac that I still use sometimes for the applications that are on it. I was using it yesterday and unfortunately had a power cut. I went to turn it on today, and nothing at all happens. It's as though no power is getting to it. I've checked the obvious things, changed the fuse, tried different cables, poked paperclips in reset holes, but nothing doing. I wonder if there is anyone who knows what might be wrong. I was hoping to get some of its content transferred soon, but I'm guessing that can't be done if it can't be started up. Many thanks, if you can help

Hello,
>It's as though no power is getting to it.
Would it be correct to assume that no sounds at all can be heard? Also, no lights, not even green or amber at the power button?
>unfortunately had a power cut.
Was it possibly a power cut in connection with a thunderstorm? Any other evidence of higher than normal voltages (light bulbs, et cetera)? Has the line voltage been checked (measured with an appropriate voltmeter/multimeter)?
If necessary, it would be possible to remove the hard drive, and then connect it to an external IDE/ATA to USB adapter (example below). That way you could gain access to files on the hard disk from another computer.
http://www.newertech.com/products/usb3_universaldriveadap.php
Jan

My History became cleared after a power-cut - can I find it in Time Machine ?

Normally, after a forced quit, Firefox restores all open websites. After a power-cut, this did NOT happen ... when I looked in History I found it completely empty (although I did not clear it).
I have Time Machine on my Mac ... but where do I look to restore the History ?

How have you searched in Time Machine?
If you can't recover them from there, the you'll need a file recovery application like File Salvage
Note that you won't be able to recover the Library the best you can hope is to recover the photos. The can by the file recovery software may find many files with the same name. In all cases choose to recover the largest file.
Regards
TD

New Photo/Video Import Lost Due to Power Cut - Any Ideas?

I am using OS X 10.9.1, and iPhoto '08, V7.1.5. My iMac was in the closing stages of a photo/video import from my iPhone 5 when a power cut occured. I had thought the photos would already be in the new album that I'd just created because I had just been asked the question Keep or Delete Original Photos (I responded DELETE). When I restarted after the power cut, the new iPhoto album contained nothing at all, and 80% of the originals had been deleted off my iPhone. I have tried looking in the main iPhoto library and Last Import folder with no joy. Is there anythig else that I can try please?

Quick update to say that I found them! I convinced myself that when the power cut occured, there's no way that a few GB of media could be instantly deleted, and thus they must be somewhere on the HD.......similar to data getting stored in a TEMP folder on a PC. I managed to access the main LIBRARY folder via Finder >> GO >> OPTION KEY and then did a search for one of the photo numbers that I knew was missing. Amazingly found it together with all the other 588 missing photos & movies buried in a folder called 26Dec2013_2 (strange considering this happened on 01Jan2014 and all the photos/media were from the period 27Dec to 01Jan). Note that my earlier search of the entire iPhoto Library package had also proved fruitless. Not sure where that folder was actually residing, but I copied the entire contents to my Desktop and then imported them into iPhoto. In short, I am so happy! Lesson learned about the dangers of power cuts, especially living in a city short on energy. I will not do that again. Hope this helps someone else sometime in the future. Thanks.

My files are all there and open in Preview but in Numbers they come up blank. Same in Pages. Any ideas please? My Mac was stopped suddenly by a power cut. Could this be relevant? Help please. Jon Sims

My files are all there and open in Preview but in Numbers they come up blank. Same in Pages. Any ideas please? My Mac was stopped suddenly by a power cut. Could this be relevant? Help please. Jon Sims

"My Mac was stopped suddenly by a power cut. Could this be relevant?"
Sounds very relevant.
Do you have access to another computer with Numbers installed?
If so, do your files open properly on that computer?
If so, then the problem is your computer itself, which is best posted in a different forum.

Major power cut and now low ip profile

HI i am using the home hub 4 and have been getting line speeds of close to 2mb for the last two years and very stable but ever since a 24hr long major power cut i have a speed of 1.3mb why is this ? ive posted the bt wholesale test results and the router stats
When contacting the BT Broadband helpdesk, the agent might ask you for details about your BT Home Hub. This page contains all of the information they are likely to request.
1. Product name:
BT Home Hub
2. Serial number:
+068340+NQ33601726
3. Firmware version:
Software version 4.7.5.1.83.8.130.1.17 (Type A) Last updated 24/11/13
4. Board version:
BT Hub 4A
5. ADSL uptime:
0 days, 00:40:00
6. Bandwidth:
448 / 1632
7. Data sent/received:
6.5 MB / 32.4 MB
8. Broadband username:
[email protected]
9. BT FON:
No
10. 2.4 GHz Wireless network/SSID:
grahamsteviesofia
11. 2.4 GHz Wireless connections:
Enabled (802.11 b/g/n (Recommended)) 20 MHz, WPS enabled
12. 2.4 GHz Wireless security:
WPA and WPA2
13. 2.4 GHz Wireless channel:
Automatic / 1
14. 5 GHz Wireless network/SSID:
grahamsteviesofia
15. 5 GHz Wireless connections:
Enabled (802.11 n 40 MHz (Recommended)) 20/40 MHz, WPS enabled
16. 5 GHz Wireless security:
WPA2
17. 5 GHz Wireless channel:
Automatic / 40
18. Firewall:
Disabled
19. MAC Address:
18:62:2c:0b:11:02
20. VPI/VCI:
0 / 38
21. Modulation:
G.992.1 Annex A
22. Latency type:
Interleaved
23. Software variant:
24. Boot loader:
FAQ
1. Best Effort Test: -provides background information.
Download Speed
1.3 Mbps
0 Mbps
2 Mbps
Max Achievable Speed
Download speedachieved during the test was - 1.3 Mbps
For your connection, the acceptable range of speeds is 0.8 Mbps-2 Mbps.
IP Profile for your line is - 1.44 Mbps
2. Upstream Test: -provides background information.
Upload Speed
0.37 Mbps
0 Mbps
0.45 Mbps
Max Achievable Speed
Upload speed achieved during the test was - 0.37Mbps
Additional Information:
Upstream Rate IP profile on your line is - 0.45 Mbps
We were unable to identify any performance problem with your service at this time.
It is possible that any problem you are currently, or had previously experienced may have been caused by traffic congestion on the Internet or by the server you were accessing responding slowly.
If you continue to encounter a problem with a specific server, please contact the administrator of that server in the first instance.
Solved!
Go to Solution.

The one thing it does not show is your noise margin. If you go to hub manager then troubleshooting then logs then you are looking for 2 lines when hub last connected to the internet which give your connection speed and noise margin. If you find them can you post
the drops in connevtion due to the power cuts have probably increased your noise margin resulting in a lower connection speed and therefore lower profile. Your profile is correct for your current connection speed
If you like a post, or want to say thanks for a helpful answer, please click on the Ratings star on the left-hand side of the post.
If someone answers your question correctly please let other members know by clicking on ’Mark as Accepted Solution’.

Can I recover guest files if I didn't log out but only forced power cut

Hello there
I have a MacBook Pro with mountain lion 10.8.3
I was using guest account and had my files on it then after a while my Mac became lagging and not responding. I left it for a while (> 6hours) And still it won't respond. The screen is black (after putting the screen down and up again) and sleep indicater is always on (not blinking) fans are still working. HDD is SSD I don't know about FileVault status but I didn't activate any encryption myself so if it isn't on by default I didn't later activate it.
I'm trying to see what my options are since I know files will be deleted if guest user logged off. But in my setuation, what are my options / chances of file recovery if I just forced power cut by long press on power button since this is my only path to go unless my laptop would magically come back to normal state.
I was thinking about force shutdown and then either target desk mode (would need to find another mac or see if genius will help) or logging on to admin and either see if I can access guest folder from there or try recovery programs from admin account.
I have time machine set up for admin on an external hdd but don't know if it also backs up guest account. If it does would I be able to recover using time machine after logging on to fresh guest ?
Thanks for your help

I don't have any option but to long press power button since my MacBook now is only functioning as a pizza warmer. My question is more about if the deletion sequence would be activated this way since technically I didn't log off yet.
If it is not deleted yet maybe I would say it will be deleted on either boot or logging in but not sure.
That is why I'm thinking about target desk mode
Files are on the internal drive and nothing is attached to my MBP.

Wifi does not switch on since a power cut. Is this hardware failure or can I reset something

My wifi will not switch on on my mini mac since there was a power cut.

Yes. It can not auto-sleep from the home screen with that feature enabled.

Power cut and now freeze mid start-up

Help, help, help!!!
I had a power cut today and my mac obviously turned off!! When I try to re-start it it comes up with the apple pic and starting Mac OS X window and then goes to a blue screen and freezes. I have booted off the install disc and that worked - I ran disk utility / first aid and it came back with no problems on the hard disk. I haven't got enough room on the hard disk to re-install OS X (Im running 10.4.6 if that is relevant)??
Does anyone have any suggestions of what else I can try? I really need my beloved mac to be up and running!!!
Many thanks in advance
Becki
G4 tower Mac OS X (10.4.6)

Power hits can do crazy things to machines. It looks like you're stuck with trying out various things to see if they are the problem. So...
1) Try pulling out all the RAM sticks but one (maybe a RAM stick got smoked).
2) Try removing all external peripherals except for the mouse and keyboard.
3) Try seeing if all your fans are running (cracking the case open before you turn on the machine can help). Some freezes happen due to overheating.
HTH,
~FifthWheel

Picture flickers on and off after a power cut - seems locked

Just had a power cut in the street and when I turn my apple TV on now the home menus come up on the screen for 2 seconds then disappear for 5, then this repeats.
The remote won't scroll along although it seems to be paired but more concerened about why the flickering is occuring as I can't use the device.
Any help?
ATV2 on 4.4.4

Try restarting the Apple TV by removing ALL the cables for 30 seconds, or resetting it using the reset option under general. You should also try restarting your router.

HT2810 Apple HD Cinema Display will not come back on after brief power cut.

My Apple HD cinema display won't come back after a brief power cut.
There is the little white power light on the front which pulses on three times and then extinguishes, repeatedly.
The Mac itself seems to power up although it's hard to tell if it's bboting properly, as I cannot see anything on the screen.
There is power going to both units so I have no idea what is happening.

This sounds like a very common problem. If the blinks are one short, one longer, one short..... long pause... repeat.... start searching this forum. There are also Youtube videos on solving it. If this is the problem, the solution is easy. You block both center pins on the 10 pin power connector. Its crazy but it works.
https://discussions.apple.com/thread/2086442?start=30&tstart=0
http://www.youtube.com/watch?v=vodDfic8omA
I just used a very thin strip of paper folded in half and slipped into the display's connector so it covers ONLY the two center contacts, then slip it into the power module very carefully. Make sure there is some slack in the paper as otherwise it will tear and the contact will still be made. If it doesn't work at first, try again as the paper made have torn in process. It would be better to use something stonger like a very thin strip of mylar. Or you can do what the video shows, but I didn't try that exactly.

IMac won't turn on after power cut

When my iMac is unexpectedly turned off, ether at the wall or during a power cut, it won't then come back on immediately. Sometimes it will come back on after an hour, sometimes after a couple of days. Anyone know why this is? There is no logic to it. I've tried all the trouble shooting stuff; the resetting SMC for example. And I've got a surge protector. I've also taken it into an Apple store, a round trip of 3 hours, twice already over the past couple of months. But after doing some diagnostic tests on it they can find nothing wrong. Also, when they go to turn it on, it fires up immediately. I was told that unless they experience the problem themselves they can't do anything. Which means I'm forever taking it in to them, during this problem, on the off chance it may still be a problem when I get there. It's very infuriating. Help!!!

Great advice. And I'll definitely do that - need to get my Mac back on and working before that however.

FireWire fried by power cut?

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