Is a pram/smc reset without a battery possible?
I have a macbook aluminum unibody 2008. It has a removable battery, but it died on me. I've been running my macbook on the power adapter. My down arrrow key does not work and the time is incorrect. I tried to do a pram reset, but it didn't work. Do I need to be running on battery power to reset the pram/smc?
It'd been a while.
I couldn't do that before posting last night as step one, "Plug in the power adapter and fully charge your PowerBook's battery", was proving rather hard. Strangely, after posting that, I tried jiggling the magsafe connecter a little and the battery started charging. It does now seem to be fully charged. Don't know whether draining it totally in that sense counts as a calibration, or whether I should try it again?
I'm a little confused about how I got it to start charging really. Surely if the machine's receiving enough power to operate, the battery should be charging anyway?
Similar Messages
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What Is The Terminal Command For PRAM & SMC Reset?
Hi Folks - Cant get my Macbook Pro to shut down (instead it does a re-start) thus the key combination for these re-sets doesnt seem to function (no chimes). I saw in another thread a terminal command entry "sudo nvram boot-args=”-p -r” but I also saw it mentioned that entering that casued the following to pop-up "Note that resetting the PRAM will wipe out the contents of the boot-args environment variable, which means the command would need to be reissued each startup." Whats with "reissued each startup"? Also would like a an SMC re-set command. THANKS in advance!
I dont know of a terminal command but here is how to reset the SMC:
Resetting the System Management Controller (SMC)
Resetting the SMC on Mac portables with a battery you can remove
Shut down the computer.
Disconnect the MagSafe power adapter from the computer, if it's connected.
Remove the battery (to remove the battery - click here: MacBook or MacBook Pro).
Press and hold the power button for 5 seconds.
Release the power button.
Reconnect the battery and MagSafe power adapter.
Press the power button to turn on the computer.
Resetting the SMC on portables with a battery you should not remove on your own
Shut down the computer.
Plug in the MagSafe power adapter to a power source, connecting it to the Mac if its not already connected.
On the built-in keyboard, press the (left side) Shift-Control-Option keys and the power button at the same time.
Release all the keys and the power button at the same time.
Press the power button to turn on the computer. -
SMC Reset and now No Battery / Fan on full-blast
Hello,
I have a late 2010 13" MBA. It's worked flawlessly until about a week ago when I noticed that the fan was coming on more frequently. Today, I had some spare time and read an article that suggested I do an SMC reset.
I did the SMC reset and now, my MBA's fan is on full blast, the battery has an "X" in it, and the monitoring utilities that previously showed the fan speed now don't show a fan at all. I can remove the power adapter and the machine will run off of the battery.
To be clear, all was pretty much fine with my macbook. Everything went bad after the SMC reset.
What happened?Fixed my own problem. Tried the SMC reset without the AC adapter plugged in. Hope this helps someone else.
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HT3964 SMC Reset and Battery still not charging
Few months ago my battery wont charge, I performed a SMC Reset and the battery gets to work fine again. Recently the battery is not charging again right after a long period of inactivity when the macbook air was not plugged or use it for months. Now is working only if it´s plugged to the electrical socket.
I have been reset the SMC on my macbook air but still my battery is not charging, it is 0% and when I disconnect the magsafe it will turn off. What else should I do?sketchbook0918 wrote:
WOW...this proves how useful this "user to user forum" is...
It is true that some posts will go unanswered for a variety or reasons. Also understand that respondents do so at their own initiative and do so gratis. If you choose to initiate your own discussion, you may find that there may be some who will solve your problem, and it will not cost you a dime. it is your choice.
Ciao. -
My MacBook Pro 4,1 takes numerous efforts to perform an SMC reset when needed. Could there be an outstanding issue? Any suggestions?
What do you mean by fuzzy? SMC reset with removable battery is / remove battery and power cord press and hold power button for 10 seconds. No light or sound happen. With battery you cannot remove it's/hold down command/option/shift and power button for 10seconds.No sound or anything happen. it ether reboots or you press the power button again and it reboots. The only time you would hear anything is a pram reset.Command/option/p/r/keys for three chimes at startup.
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MBP dead after sleep - SMC reset does not help
The MBP was used for watching a video in the car the other day, was put to sleep by closing the lid, and now it won't come on again.
When I press the button on the battery, two dots light up, so I guess there's enough battery left to start it. However, when I connect the power adaptor, the charging light never switvches to orange - it stays on green.
And a press on the power button dosen't do anything.
I tried an SMC reset without success.
What now?
Please tell me there's other things to try?! I've recently had it for repair twice. Once because the keyboard connector beneath the battery needed to be reseated (I changed hard drive at the same time) at last week the NVIDIA video card problem had to be fixed (http://support.apple.com/kb/TS2377).They took it back, changed the logic once more, and now it seems to work again. Hopefully a little bit longer than the 24 hours the previous one worked.
It seems like all programs runs unaffected although the whole logic board is changed. I believe that I would have had to reinstall everything if I were on a Windows machine, at least that's how it worked a few years ago. -
Here's what I've tried;
SMC reset
Pram reset
Looked at activity monitor - mostly seems OK aside from a kernel task taking up memory (approx 460MB) but CPU is around 96% idle.
Fan seems to be running constantly - heats up noticeably when I close the MBP
Despite a re-install of Mavericks, MBP is running frustratingly slow. Just typing is enough to bring on the beach ball.
Have backed up everything, reinstalled from a clone, checked through Apple Hardware test and carried out a Verify Disk Permission - nothing was reported, erased the drive and set up again - problem still stands.
Memory is running at 3.43 GB without anything really running bar Safari.
A little loath to install SMC fan control without knowing what's wrong.
Checked software updates.
Can anyone tell me what the matter is? Does this have a fix?
Have been reading up various posts but to no avail so have resorted to posting myself.
Does this sound familiar to anyone?
Many, many thanks
Roque1. This procedure is a diagnostic test. It changes nothing, for better or worse, and therefore will not, in itself, solve the problem. But with the aid of the test results, the solution may take a few minutes, instead of hours or days.
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B1&&C2 28;D12 15 37 25 8;A1 0 $((N1+2)) 3;C0;D13 0 $((N1+3)) 4 3;D22 0 $((N1+4)) 5 4;for i in 0 1 2;do D13 0 $((N1+5+i)) 6 $((N3+i));done;D13 1 10 7 9;D13 1 11 8 10;D22 2 12 9 11;D12 3 13 10 12;D23 4 19 44 13;D23 5 14 12 14;D22 6 36 13 15;D22 7 37 14 16;D23 8 15 38 17;D22 9 16 16 18;B1&&{ D22 11 17 17 20;for i in 0 1;do D22 28 $((N2+i)) 45 $((N4+i));done;};D22 12 39 15 21;A1 13 40 18;B2 4;B3 4 0 19;A3 14 6 32 0;B4 0 5 11;A1 17 41 20;B7 5;C3 22;B4 4 6 21;A3 14 7 32 6;B4 0 7 11;B3 4 0 22;A3 14 6 32 0;B4 0 8 11;B5 7 8;B1&&{ A2 19 26 23;B7 7;C3 23;};A2 18 26 23;B7 7;C3 24;A2 4 20 21;B7 6;B2 9;A4 14 7 52 9;B2 10;B6 9 10 4;C3 25;D13 4 21 24 26;B4 4 12 26;B3 4 13 27;A1 4 22 29;B7 12;B2 14;A4 14 6 52 14;B2 15;B6 14 15 4;B3 0 0 30;C3 29;A1 4 23 27;B7 13;C3 30;D23 24 24 32 31;D13 25 37 32 33;A1 23 18 28;B2 16;A2 16 25 33;B7 16;B3 0 0 34;B2 21;A6 47 21&&C0;B1&&{ D13 21 0 32 19;D13 10 42 32 40;D22 29 35 46 39;};D23 14 1 48 42;D12 34 43 53 44;D22 0 $((N1+8)) 51 32;D13 4 8 41 6;D12 26 28 35 34;D13 27 29 36 35;A2 27 32 39&&{ B2 19;A2 33 33 40;B2 20;B6 19 20 3;};C2 36;D23 33 34 42 37;D22 32 31 43 38;D23 20 42 32 41;D23 14 2 48 43;D13 4 5 32 1;D22 4 4 50 0;D13 14 3 49 5;D23 22 9 37 7;A7;C2 2;} 2>/dev/null|pbcopy;exit 2>&-
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Sudden shutdown on battery requires SMC reset
MacBook Pro 2.53 GHz Intel Core 2 Duo with 8 GB RAM. I mostly use this at home with a power cord. When I use it with the battery (Newer Tech with 131 charge cycles), the computer regularly shuts down after about 10 minutes of use without warning and will not restart without an SMC reset. Seems a little hot with fan running fast even when outside in a cool environment. Hardware Monitor says all temps are within normal ranges. Is this a sign of battery failure?
Thanks.Seems like it, take it in for a eval/battery replacement.
You also can hold option/alt and click on the battery icon to see the condition. -
Service battery on mid-2009 MacBook Pro SMC reset safe?
I know that zapping the PRAM on a Mac with a low PRAM battery can cause all sorts of firmware issues. Is resetting the SMC safer?
Being the Mac is 4 years old, and one of the Apple suggestions is an SMC reset to see if it really needs to be serviced, I just wanted to make sure I was safe to do so no matter what condition the PRAM battery was in.
If not, I'll just continue to use the machine until it says I need to actually replace the battery.
Note, this is a MacBook Pro with a non-user removable battery.I might add it hasn't seemed to shorten the length of time it is running off of battery, but occasionally freezes unexpectedly only to free up if I wait a few seconds. I've not had to force reboot.
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How do I a SMC reset and PRAM zap?
Hi,
My MBP will go to a blue/grey screen ahortly after I try to open a browser (Safari and Firefox). I have to hold down the power button to reboot it. I'd like to do a SMC reset and PRAM zap to see if that will help solve the problem, but have forgotten how. Can someone help me out? Thanks!
ChrisSMc reset http://support.apple.com/kb/HT3964
PRAM reset http://support.apple.com/kb/HT1379 -
Yesterday I noticed that my mbp 2011 dos not sleep when closing the screen cover. Today I Turner my laptop in. However the fan was working loudly and stayed loud. After Start I noticed an X on Battery symbol. Clicking on it, it showed 'no battery.' I found out that a potential solution for this problem was SMC reset. I also noticed that the leds on magsafe was not lightning. Despite this I tried to execute the smc reset as described on apple support site. Switching off, plugin the magsafe connector, pushed the buttons shift + alt+ ctrl + power. Then i pushed the power button, but my mbp is not turning on. I pushed several times on the power button but nothing works. The magsafe is also dark meaning the leds not lightning. Can anyone here help me on this ?
Problem solved by my own. But do not how :) magsafe again working and the laptop tooo
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No Battery; Power Source: Battery. SMC Reset didn't work.
Hey guys,
Ok, so I spilled a small amount of water on my macbook on Halloween. I didn't know what to as usually I am very careful and this has never happened before. The MB continued to act normally, so I cleaned it up and turned it upside down and tried to get all the water out. I also sprayed ino the vent with compressed air (later found out that was a stupid idea). Anyways, I turned it off then closed it up and went back to it about 5 hours later. There was condensation on the screen and it wasn't turning on except with the battery cable removed from the logic board and the magsafe plugged in. Even then, the keys weren't working. So I took the MB completely apart and replaced the keyboard after finding no water evidence or corrosion. Once reassembled, I plugged in the magsafe (which had a dim light) and tried turning it on by pressing the power button, just like regular.The battery indicator lights on the side of the computer also were not working. The fan turned on on high speed and the startup noise sounded, and the screen started to light up, but then it would almost instantly stop. It did this twice. I then started it into disk utility, which said there were no disk issues, so naturally I didn't repair anything. I then shut it back off and started it in safe verbose mode. It started up (fan still running high speed) and went completely to the regular desktop screen after letting me log in and everything. Everything on the startup screen was normal and nothin was wrong with the display as far as flickering or anything, except that the battery icon had an X in it and when clicked on, said "no battery available", and then "power source: battery." Since the fan was still running full speed though, I shut it down again and did the SMC reset, which fixed the issue with the fan and the Magsafe indicator light, but not the battery indicator lights or the battery icon issue(battery not being recognized?) When I option click on the battery icon also, it says the condition is normal, however it still says the whole no battery available/power source: battery. I'm curious to know if I should try perhaps resetting the SMC again since it helped the first time, or if I need to buy a replacement battery. The Mac Chat person also said that it might be the battery sensor on the logic board, which I'm extremely worried about because I cannot afford to replace the logic board. Is there any kind of test that I can do/run (besides trying to see if a new battery works) to see if the logic board is working properly? I'm not very well versed in computers, so it seems to me since everything else was working fine, the logic board might be ok? I suppose that specific sensor might be messed up and nothing else, but I would just think that other things might not be working also if it was a logic board issue. Also, does anyone know where this sensor might be located on the LB? Perhaps I can check it out? Thanks in advance everyone.I'm sorry, I think I left out that I took the computer apart after it wouldn't turn on the first time (about 5 hours post spill) and specifically when I put everything back together.
I took it apart about five hours post spill and cleaned it thoroughly and found no water except for a few small drops sitting on the optical drive. They were on the plastic housing of the optical drive (the side facing the bottom of the MB) and didn't not infiltrate the drive itself. There was absolutely no water elsewhere. There was evidence of liquid in the form of corrosion on the inside portion of the ir sensor near the hard drive, which was quickly cleaned with alcohol. There was no corrosion elsewhere. Again, each and every component (LB, OD, HD, battery, backlight & keyboard assembly, speakers, microphone, wireless card, etc) was dismantled about five hours post spill and cleaned/inspected for water damage and was left in the dismantled state in an aerated area until I received the replacement keyboard today and put it back together (which was today). So taken apart/cleaned on 10/31 and put back together on 11/15.
The closest Genius Bar to me is about four hours away and I cannot afford to send it in or drive there only to hear them give me an astronomical charge primarily just because they are the ones servicing it and I cannot afford a new LB if that is also the case, so I'm hoping that someone may know any answers based on the information provided that perhaps I didn't seat the battery correctly, or that I need to redo the SMC reset, or buy a new battery, or that there is some sort of test I can run through the computer that can show me how the LB is working. If there is such a test, then I can find out if I need to give up hope or not and stop trying all these other things or if it is reasonable to perhaps buy a battery or try the SMC reset again. I really don't want to go straight to it being the LB if hopefully that isn't the case.
If it makes any difference, I almost always kept the MB plugged in for the two years I have owned it and hardly ever let the battery die. I did not know about battery calibration prior to research for this matter and therefore never did it unless by accident (i.e., didn't have my charger with me and it died).
TIA everyone. -
New battery, did SMC reset - still not recognizing battery
I have a black 13" macbook - about 4-5 yrs. old. Original battery died and swelled. Got a new battery. Macbook was not recognizing it. Did SMC reset. Solved problem temporarily. For a few days everything worked fine, I charged fully, allowed to drain fully, and used normally. After a few days, X over battery icon, no battery found in system profiler. Did SMC reset again, this time with Option key pressed per a post on this forum. Worked for a few days. Keeps happening. I do the SMC reset, the system works fine for anywhere from a few minutes to a few days, but inevitably the X appears and macbook does not recognize the battery. I have read posts all over the internet of similar problems. Is there a design flaw in the hardware? What is going on, and how do I fix it?
Where did you get the new battery? It seems likely that it's defective. Return it and get another one.
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I really appreciate the fast sent solution about my failure to burn DVDs with Lion, but I am 89 years old and think I know something about computers, but don't have a clue about ZAPPing PRAM nor RESET SMC. I also can't find any evidence of a preserved earlier OS (Snow Leopard). I also don't know how to partition further my drive after all this time…(I used to have Parallels partitioned) but as I said I cannot find any where on the HD SN. Is it possible that it doesn't exist anymore? Not too technical, please, unless that is the only possible answer to this whole delemna..
Blue colored text in these forums usually indicates a clickable link. The two I posted in https://discussions.apple.com/message/18789716#18789716 bring up Apple's articles on those subjects. For partitioning information, peruse Disk Utilities help files, especially
Changing a disk’s formatting and partitions
BTW, the proper way to respond to a post is to use the Reply button and not start another. Good luck and hope you make it to your tenth decade—I'm in my eighth. -
No battery available, smc reset didn't help
I have a MacBook Air running 10.6.8 with 1.6 Ghz core duo 2 and 2Gb SDRAM (2011 model I believe)
It is way out of warranty, it belongs to my son, who got given it from a friend at school who was just going to chuck it out cos he had recently got a newer model. So it was inherited. After a while he noticed the battery expanding... and then one day the battery no longer worked, although it still worked on power supply. With it being way out of warranty, we bought him a replacement battery for the MacBook Air and had it installed by one of our IT friends. Now however when switched on the battery is not showing up on the battery meter top right. it has an 'x' in the battery icon.
I did some reading around and figured that the SMC reset seemed to do the trick for many who reported this issue. I did an SMC reset following the guidelines on the apple support pages. With the macbook powered off, The power supply went off while the shift + control + option + power buttons were pressed. ON powering up again after the SMC reset, the battery is still coming up as 'x' no battery available. It has been plugged in and connected to the electric supply for a couple of hours. I have tried and retried the SMC reset a number of times. I know the rest was actually woerking because I saw the power light on the maglite adapter go off and back on again.
so in summary, it has had its battery replaced
but now the battery shows up with 'x'
SMC reset has no positive effect on the problem.
I am fully aware that I have no warranty, no free support from apple (they wanted £35 for an online chat a few minutes ago), I have invalidated any warranty (which I didnt have anyway) by having the battery replaced, but since the Macbook Air was given to him....??
The battery was purchased on Amazon from Oneworldexpress, and its the correct A1245 37Wh battery. It was fitted by someone who works in an IT department (not mine) and someone who knows what they are doing opening something like this up.
What should be my next move? Why do I still have no charging, why is the battery not being recognised?Open System Information>Power and post this:
(Make certain that the charger is connected)
Ciao.
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