Power adapter + booting

I have recently found that my iBook will not start-up unless the power adapter has been unplugged from the iBook for a few minutes.
I have been powering the iBook from the power adapter (and not the battery) for months.
After the adapter is unplugged from the iBook for a few minutes, and then plugged in again, pressing the power button works and it boots up. After shutting down, I have to do the same thing again every time I wish to turn my iBook on.
Another note - as soon as the iBook has shut down, the adapter makes a quiet, high pitched squeeling/whooshing noise. My trick of unplugging the adapter for a few minutes makes this noise go away (I know when to plug in and press power button only because the noise has gone).
Otherwise the adapter works fine once the iBook has powered up.
Any suggestions?

I would suggest that you replace your adapter, which obviously has problems.
It could be a capacitor in the adapter burning up, and there is a possible risk of fire.

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Hello, My white McBook (2008 or 2009) recently stopped turning on. When I hook up the Magsafe power adapter, the light shows green, but the computer will not turn on, or make a sound. I've tried the re-boot option, but nothing works. Please advise!

Hello,
My white McBook (2008 or 2009) recently stopped turning on. When I hook up the Magsafe power adapter, the light shows green, but the computer will not turn on, or make a sound. I've tried the re-boot option, but nothing works. I first thought I needed a new battery because the lights at the back are all off, but shouldn't the computer turn on once the power adapter is hooked up and the light on the Magsafe adapter shows green? I'm a computer doofus, so please be kind. Please advise! Thanks in advance.
SS

Take it in for service.

AC Power Adapter issue with new (refurbished) ibook...

I just got my refurbished ibook today and went to plug it in and test it, and then wanted to charge the battery on it. At first I thought it wasn't doing anything when I went to turn it on (it made the starting sound but the power button didn't turn on or anything), but then after trying a couple times, I noticed that the black screen had a faint image of an apple on it. I had the screen too far to the front for me to see it clearly (as it's an lcd screen) and later when setting my preferences, I had noticed the brightness was just too dim which I adjusted...
So the power button never did glow when it was turned on (at least I didn't notice it after I got it booted up). My adapter's plug fits loosely in the socket on the laptop but still glows green, but all the time... Isn't it supposed to glow orange when charging??? Well I was setting up everything and did my power management settings as well, and as I have it set up to show me my battery level on the desktop, I was noticing that it was depleting (at what I would guess is a normal pace for my current settings), it started off around 83% and had gone down to 58% or so after about 1 and a half hours with highest settings basically. But my power adapter was plugged in the whole time... Shouldn't it be using my AC power and not the battery's?
So I turned it off and now it is sitting there (hopefully charging), but that little green light on the adapter where it plugs into the laptop is just that, still green...
Does all this mean that there is a problem with the power adapter and its ability to actually charge my laptop? I got this refurbished (from TigrfDirect) with a 1 year warranty (from Apple) so this should be covered, but as I just received the thing today, I really don't want to have to deal with a messed up AC Adapter...
Also, I haven't even yet checked the battery itself to see what # it is and if it is one of the ones that is part of the recall or not... I would hate to have to do that and not have a working AC Adapter, though of course if the adapter is't working, I can't charge the thing anyways, so I guess I would have to wait another few weeks with dealing with Apple and the warranty issues anyways.
I looked in the help section and the only suggestion they had for if your battery doesn't charge is to take it out and put it back in and then attach the adapter again. I guess I could do that at the same time I check on the battery's recall status, I just hate opening my computer up as soon as I get it. Also the battery cover is not totally flush with the rest of the case, one corner sticks up a bit, and I think it was a replaced item as it doesn't have the little LED lights that the computer says should be there to tell me how much the battery is charged (unless this is UNDER the cover for some reason, but the cover is bright white compared to the rest of the ibook coloring, so it seems as it was just a basic replacement cover used)...
Ok, so thanks for any input you might have. I will let people know in a couple hours if the ibook has actually charged at all during that time or not...

So I did the reset button thing and it didn't do anything at all... If I plug in the power adapter without the battery the laptop will not turn on at all, so I am guessing that it definitely is the adapter and will have to contact Apple to somehow get a new one. Oh great, tomorrow's Friday and isn't this a holiday weekend? Which means it will probably take even longer to get them to send me a replacement adapter... You think that buying a refurbished mac would mean that they would have tested out all the parts/components first before reselling it...
And so while I was at it, I checked on my battery's model # and serial # and it is one of the ones on the recall list. I think I was right that it had been replaced (now that I know that the battery is part of the back cover) which would probably explain the recall battery as this is one of the older ibooks and should have been one of the lucky ones made before the ones on the list... I did get to see the lights (only 3 though) flash solid green for about 3 seconds when replacing the battery back into the laptop.
One good thing did come out of this... As I was taking the keyboard out to find the computers serial # (I already filled out my form for the new battery), I was surprised to see an Airport card. Not that it would have surprised me too much in the first place except that it wasn't listed in the details/parts list when I bought the laptop. It was also listed that my laptop had a 10GB hard drive (while the picture on the website showed a 30GB one). The box it came in said 30GB as well, but I just dismissed that. I had went to see how much space I had left on the HD to see that it had 13.99GB and this is after any formatting, and the install of OS 10.2.8 including OS 9.2.2... So a few added bonuses to help make up for the fact that it is NOT is as good shape as I was expecting (or should be to even be sold as a refurb IMO), and the fact that the AC adapter is completely faulty.
I just hope that I can get a new AC Adapter soon, so that I can at least be able use my laptop with some kind of power until the new replacement battery shows up. This must be some kind of terrible joke. I get the laptop to be able to use it for a few hours and then have it be without ANY kind of power for posibly up to 2 months? I seem to have the worst luck with Macs, which makes it strange as I have never had any problems with all the PC's I have ever used (and I started using computers when I was 4) but I have now had an imac die (possibly the HD), an Apple studio monitor start flashing on the screen possibly due to connector problems, and now this (and all within 2 months). I am almost ready to just give up, but I have spent too much time and money on all this mac stuff (and all for my obsession with OS X) to do it just yet.
So please tell me macs aren't always this horrible, or else I will have to make up my own commercials where PCs are better because at least they turn on and boot up for more than 1 week (I think I had the imac working for about 5 days total before it would boot with errors).
Or some kind soul could also mail me a working AC Adapter that would work with my ibook (if you happen to have a spare), so I could get to do more on it other than changing it's settings... I now only have 40% battery life left. I don't think I should even turn it on again as the boot up alone would drain away too much precious juice...

Laptop won't turn on - the power adapter light flashes three times? G62 b29SA

I've been replacing the fan in my friend's laptop. I had a problem with the trackpad not working after I put it back together and that problem is not yet resolved but I have another problem preventing me from getting further. Now when I press the on button, the power adapter light (next to the socket for the external power) flashes three times and that's all. It flashes again three times every time I press the power button. It does this even with an external power source plugged in (I'm pretty sure that it's supposed to just stay on constantly when the charger is plugged in but the power source I have is a universal one set to 19 V - it has powered up with this plugged in before but I don't know whether it was taking charge from it). Any advice?
This question was solved.
View Solution.

I got the charger from my friend and now it boots up just fine. There seem to be many meanings to the three flashes based on my Internet searches but in this case it appears that it's some way of indicating a low battery.

Power Adapter for 17" MacBook Pro 2.8GHz (Mid 2009)

I'm curious to know if i can use a power adapter from an older 17" MacBook Pro 2.4GHz (Mid/Late 2007) with a brand new 17" MacBook Pro 2.8GHz (Mid 2009). Both are 85w i believe - but i wasn't sure about the new battery with this new computer.
Thanks

i would like to say, power adapters are of no tricks. They just provide voltage, current, and also the quality of them. When i say quality, it means how stable they can provide. All good functioning power adaptors should have an acceptable quality. So this is not a concern.
Then, what is going on with the "power"? No matter how many watts, there are _*no differences*_. What you have to consider is: unless it cant boot up your system, or it is not capable to charge while you are working (lower watt will just charge slower), or it has some serious problems when you are doing some high energy consuming tasks (like playing 3D games, video converting). Otherwise, the power adaptor is said to be providing enough power, and nothing to be worried about =]

Power adapter flashing

Hi
I have a problem with my PowerBook G4. I have it for 4 years now, but this problem came out a month ago.
The power adapter usually lights green when the battery is full or orange when it's charging. And mine is flashing dark orange. And i cannot turn on the computer. I took it to the local agent and they said they have to replace the board sound/dc-in.
After they replaced board sound with a new one i took my computer back home. It was working fine for a while. That is untill I shuted it down. Then same problem again. They have to order new board sound again and replace it.
Now i have removed the battery and didn't use my PB for few days and it's working just fine.
Do you think it could be related to the batteries they are recalling?? Coz my battery did qualify for the battery exchange program both times.
any idea what could be wrong. Can't be the board sound or can it?
PowerBook G4 Mac OS X (10.3.9)
PowerBook G4 Mac OS X (10.3.9)

I've got something like this happening.
I'm starting to have a problem with my adaptor blinking between green and orange on my Powerbook G4 15". It also is making a slight beep with the battery in. The battery is lighting up with the 5th light blinking at the same time. I have to remove my battery to boot up or else the hard drive spins up and nothing else happens.
I reset power manager twice, reset PRAM, reset firmware, fixed file permissions, ran Techtools etc.
This started because I was using an iBook power adapter. But I've used that for some time. It doesn't work completely without the battery but works fine with the adapter for the Powerbook.
I'm assuming this is the battery or a more difficult type of reset that needs to be performed.

Defective power adapter??

My iBook gave me quite the scare last night. (I'm using my Compaq Presario (w/ Vista, God help me!) to post this.)
My iBook had about 20 percent left on the battery, so I put it to sleep and plugged it in to charge it. About an hour or so later, I checked and the battery had drained to 18 percent. The plug light was amber, but it obviously wasn't charging. And here's what was flakey: There was a soft buzzing sound from the power adapter. When I shut down the iBook, the buzzing stopped and the light stayed amber. But I checked another hour later and the battery continued to slowly drain.
So, I checked these discussion boards, reset the PMU, took out the battery and put it back in, checked the power at about this mac (it was not charging and the battery had -- I can't remember exactly -- zero capacity), tried the power adapter with the 2-prong thing (without the three-prong extention), and the battery continued to drain. It finally got to the point where the iBook would go to sleep in less than a minute. I could barely power up or shut down. The iBook did nothing when I tried only the power adapter with the battery removed.
So I'm thinking do I need to replace the adapter, the logic board, the DC in board, the battery?? Then I again unplugged the power plug and checked the pin for damage. There isn't any. I plugged it in again and booted, and now IT'S CHARGING. And the About this Mac > power shows a healthy, charging battery. I shut down, and it's charging now, no buzzing noise, and I'm not touching it until the light is green.
Can somebody tell me what happened? Do I need a new power adapter? I bought this iBook new from Apple in September 2005. It has the orignial battery. I've never had any real problems with my iBook. What's going on?

Just an update, but I'm hoping that this problem is solved.
The new battery I ordered from OWC arrived today. I replaced the original battery and NO PROBLEM. I didn't have to wiggle the plug or anything. Everything is working as it should. The battery has charged 100 percent and I'm keeping the plug in for 12-plus hours, as instructed to calibrate it.
I'll know for sure if that was the problem after I drain the new battery to empty and see if it recharges as it should. But for now it looks like the 29 month old original battery was the problem. That kind of ticks me off because it still had 56 percent of its original capacity. It seems like I should have gotten another year of use out of it. When I removed it (and it was fully charged), it had 484 load cycles.
The battery from OWC ($99) was a lot cheaper than Apple's price ($129). Also, they were not overly helpful at the closest Apple store (23 miles away). I would have to bring the iBook in so they could inspect it. They would have to order the part (if it was the DC-in board) and I would have to make a second trip to the store. The part wasn't in, but even if it was, they wouldn't hold it for me, and they wouldn't order it for me until they inspected the iBook, and they wouldn't just sell me the part. I had to have it installed by them for $85. The DC-in board is $12. The cheapest new one I could find on line was $29.95 (and $9 shipping).
So ... I'm hoping the new battery fixed everything. All seems to be well.

Is the power adapter rated 100-240v for the HP Stream 13 Laptop ?

Hi,
I want to buy it. and i want to be shore about the voltage...
.....Is the power adapter rated 100-240v for the HP Stream 13 Laptop ?
Thank You.

I might have tested it myself a few months ago, I cannot remember the results but I believe booting from the SD slot is not supported by the UEFI firmware. It is mentioned here in the comments of this Amazon review for the Stream 11: "I have not been able to boot ANYTHING from the micro-SDXC slot. I can install Ubuntu on it, but I cannot boot from it. I don't know if booting is even possible."

Power adapter intermittent charging

I have a late 2006 17" Mac Pro for which I recently replaced the power adapter. As recommended by Apple, I purchased the 85W MagSafe adapter with the "L" style connector. The original adapter had a "T" style connector.
About two weeks ago, the adapter began to function intermittently: sometimes it would charge the laptop and sometimes it would not. Whether or not it was charging was clearly indicated by the small light on the connector. I took the laptop and adapter to my local Apple Service Provider to explain the situation and, of course, it functioned perfectly while at the shop. The technician ran a diagnostic on the computer and adapter and confirmed that everything was working properly.
Nonetheless, the intermittent behavior continued. After a little troubleshooting on my own, I determined a pattern to this problem. Here's what I found:
1. If the computer is plugged in before it is booted up, the adapter charges.
2. If the computer is running or asleep when the power adapter is plugged in, it does not charge.
3. If the computer is plugged in (and not charging), and is then shut down completely and turned back on, the power adapter will begin to charge as soon as it boots up.
4. If the computer is plugged in (and not charging) and restarted without shutting down completely, the adapter will not charge.
Any ideas on how to remedy this situation? Resetting the Power Management Unit maybe?
Thanks, Everyone!

First of all, stop using the adaptor--it is dangerous and appears to be unusable now. Take a look at this article:
http://support.apple.com/kb/TS1713
Also read the linked articles.
The argument that you will need to make to Apple is that the condition resulted from faulty manufacturing and not from user abuse. I think these situations are decided on a case by case basis. I think the earlier models also had a flimsier strain relief than the later ones, and these earlier ones were more prone to failure. If that's what you have, you may be able to make a case for replacement.
Good luck!

MacBook won't start on battery/shuts down when power adapter is removed

Help & advice needed please.
My MacBook won't start without external power, it gives a whir then a click then nothing. Once started up, if I remove the external power it just shuts off.
The battery shows at 98% & charging. Coconut Battery shows the following:
Current battery charge 4126 (& increasing as I type)
Maximum battery charge 4200
Current battery capacity 4200
Original battery capacity 5200
80%
Battery loadcycles 111
Age of your Mac 6 months
Charger connected yes
Battery is charging yes
Does anyone have a clue why the Mac won't power itself on the battery when everything else seems like it works?
Cheers!

As of today, my MacBook and I have been together for 40 days. Yesterday, while I was happily surfing (on battery), it powered down with no warning. Okay, these things happen. I plugged it in, restarted, and all seemed to be fine. Battery was about 70%. I did other things on my other machines and when it was about 90%, unplugged it and everything was good. This morning after using it unplugged for 1.5 hours it did the same thing, but decided to only work with the power adapter, not on battery alone. When trying to boot without AC, it would try to spin the CD and then fall back into off. When on AC, if I pulled the adapter, it would last two seconds and go blank. I made an appt. with the Apple store (Fashion Show Mall, Las Vegas) for 3:20pm. I got there right at 3:20pm and the monitors showed I was 5th in line. Store was fairly packed, at least one patron at every display item. Monitors also said the next MacGenius appt. was "approx. 8:30pm." Glad I made an appt! I was served about 15 min. later, during which time the monitors had changed to "No more MacGenius appts. available today, please try tomorrow." However, one guy came by without an appt. and was told he would be put on standby and to come back in 30 min.
Once I explained my issue with my MacBook battery, my Genius tried one of his batteries. "I just want to make sure it's your battery and not your motherboard." My machine worked fine, so he said "No problem, I'll have you out of here in 10 minutes." He got me a brand new battery, tested it, and put my old one in a box on the rear counter with four others. He pulled the serial number from the "About this Mac" area, didn't need my receipt for purchase date or anything. I had even printed this page: http://www.apple.com/support/macbook_macbookpro/batteryupdate/ to use as ammunition, but didn't need it. He did approve highly of my dashboard widget "iStat pro", available here: http://islayer.com/.
So the battery issue is a very common problem, and one that Apple has tried to deal with as painlessly as possible for the consumer. My Genius did ask if the battery showed an "X" in the icon bar, and I said no. Just wouldn't run on battery. On the way out of the store, one of the 3 MacBooks, in fact the one closest to the door, had an "X" on the battery icon. When I unplugged the power, it shut down immediately! The moral of the story is to contact Apple immediately with problems and give them a chance to fix them. Hope this helps others.

Brand new MPB 15" power source is always "power adapter"

So, my brand new 48-hours-out-of-the-box Macbook Pro has developed a nice little issue. Everything is fine when the power adapter is plugged in, nothing abnormal. Whenever it's unplugged, however, it still says the power adapter is plugged in and the battery is "not charging". E.g., if I click on the battery icon in the menu bar when unplugged (show setting: percentage), these are the first two lines of the menu, verbatim.
Battery is not charging
Power Source: Power Adapter
Oddly, percentage is listed and (to the best of my knowledge) accurate.
I've tried an SMC reset many times, nothing. PRAM reset, nothing.
Anyone else with this problem? Seems like a firmware glitch.

Hmm, when I boot up from the restore disc, System Profiler is normal. It shows a "power settings" entry for both the adapter and the battery. From the hard drive, system profiler shows only a settings entry for the adapter, which leads me to believe that the battery settings were somehow corrupted and now only the adapter case is recognized.
Since there's no drop down when clicking on the battery icon when booted from the restore disc, I can't compare that. Note that Sys profiler is identical in both cases except for the aforementioned difference. In both cases, it states that the "AC Charger" is not fact connected when on battery power.
If I end up having to take a 3 day old macbook pro to the genius bar, they better do the right thing and swap it out on the spot.

HP Business EVO Notebook NX7010: Power Adapter Issues?

Hello,
I have an HP Business Evo NX7010 Notebook and it has behaved strangely lately. When it is turned off it will boot up without being switched on. The trigger for this behaviour is inserting the power adapter plug. So I am guessing that the power adapter or the power jack has a fault.
Also, sometimes the battery does not charge when the power adapter is plugged in.
Would these problems be associated to the power jack or the adapter?

Something cracked the power jack on the AC adapter open...it was not in the passive voice just "cracked". It takes some accident or event, When that happened and you kept using it you fried the motherboard. The pwer The laptop needs the motherboard replaced. I could try to sugarcoat, but that would not be honest. The power jack inside the laptop is not bad, it is the internal charging circuitry of the motherboard. So the light turns blue but nothing happens from there to the battery and to the motherboard itself.

D10 power help -- psu power supply 10-pin power adapter

i have a d10 motherboard, and i've fit it into an intel server chassis.
the PSU installed has an aux-power adapter, but it is a 4-pin used for intel server boards.
i need to convert some of the extra cables from the PSU in my chassis to work with the 10-pin connector on the motherboard (next to the 24-pin connector).
if someone could help me out and maybe provide me with adapter information, voltage information, any information.....that would be a great help. a diagram of sorts would be greatly appreciated. or maybe even a picture of the actual 10-pin cable going from the PSU to the motherboard??
thank you!!

Quote from: Mummy on 23-November-13, 14:32:52
Hi
Yeah take the MB out of case and plug in only: CPU, PSU, 1 Memory stick (to secend slot from CPU) and monitor to MB back.
If it dont boot up after that and show error for not finding KB, then what code it has on debug led?
Hope this helps Cheers Mummy
Disconnected everything from motherboard except CPU + cooler & second RAM DIMM, set it on a cardboard box, plugged in 20+4 main power connector and the 8 and 4+4 CPU power connectors, then tried powering up again. Couldn't connect a display because I don't have an HDMI display handy - but I figure that doesn't matter much if power isn't even on long enough for BIOS to begin loading anyway. Nothing new happened. Unfortunately, a debug code never comes up.

Macbook Pro 13" power adapter

I bought my Macbook pro 13" from someone around Christmastime last year (who bought it only a few months prior) and it works great. However, my power adapter is dying and my AppleCare and warranty are up. It's very finicky and only works about 10% of the time anymore. It's the newer model of adapters that are round and thinner than the old flat rectagular adapters. Could I buy the older model for my Macbook and it'd still work? Or do I have to buy another newer model adapter?
Thanks!

I recommend getting the one designed for the unit to ensure long-time reliability.
17" 2.2GHz i7 Quad-Core MacBook Pro  8G RAM  750G HD + OCZ Vertex 3 SSD Boot HD 
Got problems with your Apple iDevice-like iPhone, iPad or iPod touch? Try Troubleshooting 101

T520: Power adapter voltage is lower than recommended

Hello everybody,
I bought a Thinkpad T520 last august and totally perfect, but I have been receiving extrange messages when booting it. It sometimes says 'The power adapter voltage is lower than recommended' or something similar. I have been using normally but today I read that the Thinkpad AIO have power adapters problems, so I wondered if I may have the same. I'm sure mine has something wrong, because it has lately been slowly. I have ArchLinux on it so it's really light, but even with it, opening a terminal takes 2 seconds.
I don't know what to do. It seems I have the same problem as the AIO or something related. I'm not planning to contact through phone because I'm not a native english speaker and the last time I called I didn't get a lot of things they told me...
I hope anyone can guide me in what to do. I'm happy with the Thinkpad overall, but I would like to fix this.
Regards to everyone,
Adrian
Moderator Note: Edited subject to match content.

Hello adrian,
please tell us your operating system and modell number.
Which power supply do you use? Can you post the part number?
Does this message occur only in Linux.
Best
Andreas
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Power adapter + booting

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