MacBook Pro :: Dead PRAM Battery Causing Failed Startup?
Jul 28, 2008
one of my Al Powerbooks decided to kernel panic twice in the past two days and both times fail to start up afterwards. The symptoms would be that when I pushed the power button, I wouldn't hear the Apple startup sound and it would just sit there.
Well, after a few tries and some sadness, I decided to remove the PRAM battery card and voila, computer boots up perfectly! This has actually happened twice (removed PRAM card, booted up, then put PRAM card back in, then eventually exact same situation occurred again), does anyone know if a PRAM battery card can possibly wreak suck havok on a G4 running Leopard.
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Oct 19, 2009
I think my PRAM battery is dead (date resets to January 1st 1970 when started up with main battery removed) but I can't find a replacement PRAM anywhere (I'm in the UK). According to iFixit the part number is 820-1686-A - is this the only PRAM module that will work in my machine? (I've seen lots of other similar looking parts on eBay, but with different part numbers). Also, is it not possible to actually just replace the battery, not the whole circuitboard? It looks like a regular watch battery I could pick up for $5 from the pic.
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Dec 10, 2014
I have a macbook pro that is simply dead. I have tried an SMC reset, a PRAM reset, and I bought a new battery. I see the green lights on the back of my battery and the power cord is an apple cord that appears to be just fine. I have also tried to power on the computer with the power cord plugged in but the battery out.
Worth noting that I do not hear any fans, any clicks, or *any* indication that the computer is trying to power up. The only signs of electricity are the green lights on the battery and the small charging light one sees on the cord when plugged in to the computer.
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May 20, 2010
I just want to make sure nothing else is wrong with my Macbook..have never replaced the battery in 3+ years...Always says not charging and once the magsafe is removed Pro shuts off...is completely dead battery the only problem..?
Battery Information:
Model Information:
Serial Number:Sony-ASMB012-3856-4ebc
Manufacturer:Sony
Device name:ASMB012
Pack Lot Code:0000
PCB Lot Code:0000
Firmware Version:0110
Hardware Revision:0500
Cell Revision:0303
Charge Information:
Charge remaining (mAh):0
Fully charged:Yes
Charging:No
Full charge capacity (mAh):0
Health Information:
Cycle count:218
Condition:Check Battery
Battery Installed:Yes
Amperage (mA):0
Voltage (mV):10209
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Apr 4, 2012
Now normally I wouldn't expect it in an under 4 year old machine, but the normal battery is working as expected. However, when I'm not plugged into power, my WiFi doesn't always reconnect, and when it does, the internet doesn't seem to connect either 90% of the time. When I'm plugged into power, no problem. 3 other machines on the same wireless network have no issues with it, though my cable company says they are detecting intermittent signal loss, which I can't reproduce on any other machine. The other reason I believe it is the PRAM battery and not the main battery, is during one reboot, the date reset itself to year 2000. Once I managed to reconnect the internet, I was able to set the date & time to the time server.
Info:
10.7.1 iMac 5,1 MacBook Pro 3,1, Mac OS X (10.7.1)
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Mar 13, 2010
I noticed my battery life and temps a higher then normal, decided to purchase and scan with virus barrier X6 and up came a iservices.b2 trojan. I removed it and now I notice my temps 10c lower and battery life about 1 hour more. This trojan was sitting resident on my mac for a little while now without my knowledge. Intego says it is mostly bundled with pirated software, but I have nothing pirated, everything I purchased. Now I am trying to find where this came from. If you have high temps and a low battery life unexpectedly....scan your machine.
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Apr 3, 2012
How do you locate and/or change the PRAM battery in an iMac G5 (iSight)?
Info:
iMac, Mac OS X (10.5.8), PPC, 20", G5
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Jun 26, 2012
I lost the startup tone a couple days ago. I repaired permissions, did an SMC and PRAM reset and it makes the tone while doing the PRAM reset but the next time you turn it on it doesn't make a sound.
Info:
iMac, Mac OS X (10.6.8), 3.2 GB Dual Core
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Jun 22, 2007
My Powerbook will not power on. I have followed some instructions on disconnecting the PRAM battery and that did not work, any ideas? I just stopped coming on without any explination.
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Oct 12, 2010
My wife and I always leave our MBP plugged up when we are near a charger. This morning the MBP had been plugged up all night, but the battery was dead. I noticed the light was out on the charger so I went to take it out, but when I touched it it turned red indicating that it was now charging. It turns out it is very finicky and randomly stops charging. Anybody else had problems with their charger? It will be Thursday before I have a chance to get to the Apple store.
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Mar 13, 2012
My MBP battery was dead for about 1.5 weeks. I charged it fully but now when I try to log on it doesn't seem to recongnize my password.
Also during start up, the spinning wheel appears as usual but also a progress bar that wasn't there prior ro dead battery. It only seems to progress about 30% of the way across before reverting to my login page.
Could I have damaged something by lettinbg the battery go dead for so long?
BTW the factory reset procedure doesn't seem to work. Should this procedure be executed from power off or power on mode?
Info:
Mac Pro, Mac OS X (10.7.3)
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Apr 12, 2012
This was a new battery 8 months ago. I checked its health periodically and all seemd good until two days ago when the battery went from healthy to dead in less than 8 hours. Is there anything to do to bring this one back to life or is the only remedy to buy another one?
Info:
Macbook, Mac OS X (10.5.5)
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Jul 3, 2012
After 1.5 years of use, my MBP's hard drive failed. So I purchased a new SSD and followed carefully the installation guide on [url].. and also [url]..
After the installation my macbook was unable to power up. I took it to Apple Genius Bar and the guy told me my Logic Board has been damaged, possibly because of the installation. He also told me I was not meant to disconnect the battery connector because this causes damage to Logic Boards.
Info:MacBookPro, Mac OS X (10.7.2)
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Mar 25, 2012
how do you startup a dead quadra 840 av i will give 10 points to every usefull reply
Info:quadra 840av, Mac OS 8.6 or Earlier
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Apr 2, 2012
MacBook 3,1 screen goes dim when charger plugged in. Battery is all but dead. Green light is on on the charger cord connector at computer. Computer turns on then goes dim after a few minutes. Can a dead battery cause this, i.e., is it worth it to get a new battery to try and save this?
Info:
MacBook
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Sep 8, 2007
My mum has an trusty iBook G4, and finally, after ~4 years now, the battery is on the fritz. I have tried resetting PMU, but it appears the battery itself is on the way out. Is it worth purchasing a new battery for it? Or should I tell her to take the plunge and buy a low-end Macbook [non pro] to replace it?
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Jul 5, 2008
I had a quick question that I'm sure one of you guys can answer. I have a PB Wallstreet 266mhz and it works fantastic minus the fact that the battery is dead and the pram doesn't seem to be functioning. On the rare occasion that I cold boot it I get nothing onscreen for about 15 seconds..then I get the good ole greyscreen and onto the Mac OS 9.1 loading screen. Is this normal for this type of powerbook? Is it because the PRAM and main battery are dead?
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Dec 31, 2006
I have just bought an old ibook g3 on ebay, the battery in it is dead, if the battery is one of the ones effected in the recall will I apple just send me a new one even thought the battery is already dead?
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Apr 24, 2009
I have the 1GHz Ti Book, 15", 1GB PC133 memory, 60GB 4200 RPM drive, Tiger, and it's awesome. Battery is basically dead (10 min). I do typical web/email stuff.I also do some music recording and it works fine. Watching video is difficult on [URL] though. I need to upgrade to Leopard as I want to start doing Web Development using Rapid Weaver. The new version of Rapid Weaver requires Leopard. So, while I'm planning on purchasing a new machine soon, I wonder if it's worth spending the money to:
1) buy Leopard for my TiBook (are there performance issues?)
2) buy a 7200RPM drive (for performance)
in order to run Rapid Weaver 4.0 or not.
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Jan 21, 2010
So, back in the day, when my MacBook Pro's battery would die while asleep or on and you plug it back in, the laptop would essentially revive itself from your last used state. Its like waking from sleep, but takes longer because the computer has backup the memory state to the hard drive.
Its seems my MacBook Pro no longer does this. When the battery dies and I turn it on, it reboots. I am not sure if it is related, but I have modified my MacBook Pro by removing the optical drive and replacing it with an 80GB Intel SSD to compliment the 500GB 7200rpm Seagate. The SSD is the boot disk and is in the DVD Drive's old spot.
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May 1, 2012
iMac won't start up after failed upgrade install, all I have is a folder in the middle of my screen. And it won't allow me to reinstall my restore discs....
Info:
iMac, Mac OS X (10.4.11)
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Oct 30, 2010
I have a 17" PB with a couple of growing issues. Right now I am unable to use it for one of several reasons. About a year ago I purchased a charger off of Ebay to replace the original one that started sparking. Shortly after I received the new charger I started having issues with the charger connecting. I would have to twist it and turn it to find the right spot. Now, it doesn't glow green or amber at all. That sweet spot is completely gone. Also, the battery is completely dead. It needs to be replaced. Not sure at this point if I'm sitting on a dead charger or if I need to replace the DC-In board. I have never had a major accident with the machine but I do recall snagging the chord once or twice. It is possible something was damaged inside when that happened. I've never had an issue like this so I'm not too sure about the symptoms. I'm thinking a new charger would be the cheapest and safest start. I don't feel very confident purchasing one from Ebay again.
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Dec 1, 2014
Macbook Pro 13" 2.3 ghz i5
4GB Ram, 240GB SSD
OSX.9.5 Mavericks.
Problem: Once shut off, my Macbook pro won't turn on by pressing the power button. It is as if I must jump start the computer using the power cord. What is interesting is that if I push the power button (without the power cord plugged in) the macbook won't turn on, then, when I plug the power cord in, the computer magically turns on without my PRESSING the power button. It is as if the computer knows it has been told to turn on but is waiting for more electricity.
When the computer is on, The power button also doesn't react when I press it. As recall, on macs, pressing the power button quickly creates a pop up menu that asks if:
a. you want to shut down the computer
b. restart the computer
c. put the computer to sleep
This computer will shut off if I hold the power button down but does not give me the pop up options.
Battery appears to be in good health. Though it has been through 780 cycles. Coconut battery says that the battery is fine. This Macbook Pro's Sd slot stopped working as well.
Info:
MacBook Pro, OS X Mavericks (10.9.5)
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Jul 6, 2009
I just want to say thanks apple for being a piece of **** machine. I have the first macbook 1.83 ghZ 2gb (that I bought from crucial) intel core duo. The problems I have had:-Battery not charging (70? replacement because I had no more warranty)-Burnt and melted charger (also expensive)-And now the problem is unknown all I know it will not start.-Faulty Macbook Air -After the second Macbook Air the charger would not work.I mean you would think that so much money for slow computers would get you reliabilit
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Oct 20, 2009
I've got an early 2008 Macbook Pro and, recently, I've noticed that the fan (fans?) begins running from the moment the computer is powered-up. iStat tells me that both fans are running at about 2000 rpms, though I only hear a slight whoosing noise from the left side. I don't remember the fan running constantly, and I have noticed that my battery life seems worse than normal recently. Is this normal, and something I just haven't noticed until recently?
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May 27, 2012
After installing Adobe CS6 Master Collection, i noticed during start up that the battery and wifi icon loads too long, it took about a minute before they will show up, and when i point to that area, the pointer turns to beach ball..
Info:MacBookPro, Mac OS X (10.6.8), i7 2.2 17"
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Feb 12, 2012
Ever since I upgraded my Macbook Pro (mid 2009) dual core from Snow Leopard to Lion, the start up time has increased significantly, and the battery life seems to be lower than it has ever been. It has been several months since I upgraded so indexing is not an issue. What should I do, and how can I get back my missing battery life that Lion took away? And how can I make my reboot and startup time faster.
Info:
MacBook Pro, Hard drive
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Jan 4, 2009
I'm working on a G4, 733 mhz Power pc running 10.4. After replacing the internal battery, computer freezes up at startup. I hear the chime, blue screen and OS X box appears with progress bar and then nothing happens.
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Oct 1, 2010
So I have a macbook pro old model.Recent Problems:graphics card failedsystem crashed had to reinstall system crashed again and would be stuck on apple logo
now after i reinstalled SL after the stuck on logo problem my mac was fine.3 weeks later which is now it started to lag,slow,unresponsive.So i tried repairing disk utility and FAILED then i tried reinstalling osx FAILEDthen i had to delete my whole harddrive :*( and reformated the harddrive.FAILED AGAIN.calling apple is a no because i already called alot before so now they want to charge.So did i reformat wrong? something?
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Mar 1, 2010
With the early uMB 2.4 do you have to zap the PRAM after you upgrade your HDD? if so how do you do this?
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