MacBook Pro :: Fix Electric Current Fault
Jun 6, 2010
I was an owner of a white macbook for just over a year until the motherboard decided to give up the ghost... So I eventually bought myself a new 13" Macbook Pro. Everything was going just beautifully, until I realised when I was charging it, I had this weird electrical current going through all the aluminum.First of all the first two things that came to mind was. What's the computer and most importantly MY health going to be like if its exposed to all this! Anyway. I read a few threads, and they were talking about the "Grounding" problem. Luckily I got my old macbook charger out and plugged it in.. The problem went! So I was then thinking on where in the charger lied the problem? So I took the cable part from the Megasafe to the socket from my macbook, and then put it into my macbook pro Megasafe... and everything worked brilliantly! I'm no genius, however if you guys feel that tingly electrical/static current going through you're MBP, go and buy yourself a new cable. However as Apple is so popular, I'm sure if you try one of you're friends (As they will undoubtably have one) and see if it is that the problem. In anycase, I'm very happy with my Macbook Pro Apple make some awesome products. Bill Gates should just pack up and go fishing if you ask me. He can never compete with Me old mate Steve
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Sep 12, 2008
I recently traveled to Europe with a MacBook Pro, and plugged it into the outlet with a travel converter. My understanding is that the brick on the magsafe cable works as a transformer and it is safe to plug into a European outlet. I've never had a problem with other laptops.
Everything worked fine with the machine, except I could always feel an "electric" sensation through my hands when touching the aluminum case. This was especially apparent when running my fingers across the top -- it was as if I could feel an electric current running through the case.
This seemed harmless, and I ran the computer without fail during my time abroad. My question is out of curiosity -- is this sensation normal? What exactly is it?
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Jun 29, 2012
Guys, I have touched on my iMac 27 on the USB cable and I have got an electric current passing over me. My feet were naked. When I got my shoes back the problem gone. Is this normal? Is it safe for my iMac and external devices?
Info:
iMac, Mac OS X (10.7.4)
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Jun 29, 2012
I bought a faulty MacBook pro off eBay really cheap, it's immaculate condition externally but it won't power on. It came without a battery,charger or a HDD. The power adaptor came today and I put it in, without any battery or HDD would anything happen when you press power or not? Otherwise I'm assuming it's a possible logic board replacement?
Info:
iPhone 4, iOS 5.0.1
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Aug 18, 2010
After using a PC laptop for six months or so (and it really messing with my eyesight) I thought I'd try to revive my old macbook. Basically 70/80% of the time it won't turn on. There are these patterns of faulty behaviour which I hope you guys could diagnose:
1. I'll press the power button, I hear the disk noise, and the screen is black (i.e. not a backlight problem). The chime won't sound, I can just hear the fan and the hard drive whirring. The only way to get out of this is to power it off via the power button.
2. Sometimes after it's started up successfully and I move the Macbook (say, from a desk to my lap) the same thing will happen - black screen, with the rest of the stuff whirring, and if I try to shake it around nothing happens, I have to power off.
3. Occasionally when I power on, I just get the disk noise, a white screen, but no question mark, no apple logo, nothing.
4. Another time I tried to boot up with an external hard drive fitted and just got the chime over and over and over. Removing the drive solved this.
5. One time the screen just greyed out and a message in about 5 languages came up saying I needed to shut down my computer NOW.
This is not a hard drive fault - I saw that apple had extended the warranty on the hard drive because the question mark usually pops up for half a second at startup, and the nice guys at regent st London just whacked a new hard drive in, with a clean install of leopard (which was cool, I was previously on tiger at the time). I read something about resetting the PRAM (which I haven't tried), but I'm guessing it's the logicboard/motherboard. If this is the case, any idea how much it costs to fix? (My macbook is out of warranty). Figures in GBP appreciated but I can convert USD estimates. Is there any way I can try to blag a free motherboard and install from apple by exaggerating some symptoms?
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Dec 11, 2010
I noticed that the MBA only has one headphone jack.
Now is that both input and output? If its not input then i would need one of those fast track things im guessing.
I have both input and output on my hackintosh which I can use to record my electric guitar on GarageBand.
I hope I don't have to buy a fast track as not sure how it would run over a USB hub.
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Jun 7, 2009
how to connect my macbook air to my electric guitar because i would like to record with my mac but i need your help to do it.
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Mar 29, 2012
the top part of my screen is doing like an electric gig not sure whats wrong.
Info:
MacBook Pro, Mac OS X (10.7.2)
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Nov 10, 2010
I see Apple left out audio in on the new Airs. Wanted to be able to record the audio out from a electric piano.
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Dec 24, 2009
I've hooked my MacBook to my TV, but everytime I connect the charger it trips the electric switch in my house and shuts everything down. Very annoying... This only happens with the Macbook is connected to the TV...
Has anyone had this before and how can `i go about solving this problem?
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Apr 3, 2012
I have the cable that connects my guitar to my mac, but I do not know how to get garageband to recognise that the instrument is connected.
Info:
MacBook Pro (13-inch Late 2011), Mac OS X (10.7.3)
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Jun 20, 2012
I´m planing to buy a macbook pro retina display, and I am wondering if I can connect my electric guitar to it since it doesn´t have an audio line in, only a headphone port?Â
Info:
MacBook Pro with Retina display
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Mar 16, 2010
Figured it would be a little lighter to have a thread that shows that Apple's computer CAN and DO work occasionally....Here's my uptime on my i7! It wants me to reboot for Safari update, but I refuse. As of 8:42am PST, March 16, 2010:I guess currently I have the longest uptime of anyone in this thread!
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Jun 17, 2012
Recently I've started creating and using Smart Playlists. And ever since I created a Smart Playlist - when I make any change to the metadata (artist, album title, anything at all - even just changing one letter) - iTunes freezes up for about 10 to 20 seconds as the wheel spins and iTunes processes the new information. But in the meantime iTunes is rendered completely frozen up for me. Same thing happens if I begin importing (whether from CD or just dragging) new music. Is this sort of thing normal? I assume it's the program processing the new information for the Smart Playlist, but for pete's sake, does it have to render the complete program useless? Smart Playlists are a nice idea, but they have made iTunes a nightmare to deal with!
Info:
Mac Pro, Mac OS X (10.7.4)
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Apr 14, 2009
This is something I've been wondering for a long time. I seem to have a lot of screen-related issues with the Pros that I sit in front of in the main. Brightness controls going haywire displays not turning on, etc. There is also the odd attached USB device lockup, but I'd been putting this down to the devices themselves and the occasional, app-level instability of Leopard. More recently though, I've been seeing a pattern that's leading me to suspect the Pro's more than the peripherals. Is there a documented case of possible USB hub connection issues in (fully patched) 2008 Pros? The most frequent issue is monitors not behaving as expected when the system is booted until the monitors themselves are unplugged from power. There are also less frequent but present problems where iPods lock up, keyboards stop working, etc. I can't really abstract the problem down to an OS issue or a hardware issue, but the need for me to unplug the monitors seems to indicate that there is some sort of USB initialisation issue - as with the other minor problems I experience with other monitor-connected USB peripherals. Since I only use multimonitor environments as far as my Pros are concerned, all USB connections are usually made from the backs of the screens. So the big question is is this a screen USB hub fault, or a main-unit intermittent fault? All of the monitors I'm using have been to Applecare for one reason or another, although I'm not sure if they check everything in these repairs.
Can anyone else shed more light on this issue? It's pretty hard to replicate reliably and it's not been something I can go to Apple with any degree of certainty, yet the little minihoops I have with this problem (and oh so many other Apple issues, but that's by the by) irritate me immensely in comparison to my rock-solid, near-zero-such-issue, non-Apple environments which I also use daily.
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Jul 29, 2010
Recently i've started to experience my iMac screen flickering for approx 2 seconds, and then turning back on. I was wandering if this was a common problem with this model of iMac (purchased mid-09, 2.66ghz 4gb ram model). I had read of such a problem with the new 27", and in some cases even with the 21.5".
I have only recently begun to use the iMac for relatively graphically-intense tasks, and was wandering if perhaps it could be a dying graphics card (or perhaps it was always faulty, but the lack of intensity of any programs run never pulled it up originally?), or if maybe it was an issue with the LCD?
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Feb 15, 2012
Earlier today I had the LED Panel replaced in my 27" iMac (Applecare Warranty) due to a screen discoloration that had appeared around the Optical Disk area of the screen. The replacement LED has resolved that issue. However, (and I don't know if this is due to the new LED installation) I now find that I cannot 'color calibrate' the new screen. On opening Display Preferences/Color, there are three display profiles listed;
• iMac
• iMac 27 Calibrated
• My 27 iMac Calibrated.Â
On selecting any of the above and clicking the 'Open Profile' button - I'm given this message; Unable to determine file format. The file "/Library/ColorSync/Profiles/Displays/iMac-00000610-0000-9CB5-0000-000004272D40 .icc" does not appear to be compressed or encoded.It is advised that you obtain further information about the contents of this file from the sender or provider of the file.    On selecting the 'Calibrate' button - I'm given the message; Can not calibrate the display The factory profile for the display could not be found. Â
Info:
27, Mac OS X (10.7.2), • 23" HD Cinema Display • iPhone 3G 16Gb • ATV
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Apr 10, 2012
I recently tried to update a few software on my MacBook Pro, but apparently software update crashed while it ran in the process. So I cannot update any software since it won't work at all. I even tried to run software update on command line and it gave me "segment fault".
[Software logs] .....
Info:
MacBook Pro, Mac OS X (10.6.8)
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Jun 30, 2012
What means hardware test fault 4Mot/4/40000003:HDD-1255? I´m searching for the reason of frequent freezing and finder freezing, freezing in Safari too, and got this result with extended Apple hardware test from CD. Checking volume by Lion recovery tells: volume seems to be o.k.
Info:
iMac, Mac OS X (10.7.4), iMac 27" Dual Core, late 2009
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Nov 3, 2009
I took the plunge and got a MBP 13 (5,5) in October. Its all going well except for the same problem that recurs.
The problem is that when plugged in via magsafe i recieve a mild tingling throughout the shell. This first happened a week after I got it but I solved it by using the long lead instead of the smaller plug. But now even the longer lead which is supposed to remove the issue still gives me the same vibration/electric shock feeling. Its NOT minor, I feel it when its plugged in and it hurts! I get a headache when it does this.
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Mar 3, 2010
The screen saver that this produces are beautiful but is it safe? It works via your computer communicating with hundreds of computers around the world?
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Jan 10, 2011
I've linked my guitar up to GarageBand and am trying to get a setting which sounds metal like, but at the same time sounds clear and i'm failing. It produces a good sound but its so full of noise its unbelievable.
The guitar has no noise when its on a setting which doesn't have distortion/fuzz or gain on it, but then i don't have a metal sound.
Does anyone have any idea how i can make such a setting?
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Mar 22, 2007
Picked this up from the Apple Store in London a few day ago and I've been having some trouble getting my electric guitar to work with my mbp.
When I plug everything up and try and play it records through the mic on the mbp and not through the pickups.
In system pref>sound>input I have line out selected along with the volume all they way to the write.
What am I missing here?
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Nov 24, 2009
My mouse wire (or cable, or whatever..) is kind of messed up with the wire showing on the connection to the mouse and basically in the middle of the wire towards the USB connection to the CPU. It's the Apple mouse.. will I get an electric shock if I touch it while it's on? It's kind of sounds funny that I'd touch it but you know ..
I have electrical tape I don't know if that's necessary.
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Jun 15, 2010
I don't know if this is something to be worried about but I notice that when the tip of the display port cord ( from the ACD ) touches the metal frame of my MacBook Pro there is a tiny blue arch of electricity visible. Well, I just bumped that cord into the frame of the MBP and as soon as that happened the computer completely shut off, it just went to a black screen and turned back on when I connected it via AC outlet. When the computer started back up the clock was messed up ( 2008 date ) and it had forgotten all of my WIFI passwords.
I was just wondering why this happens?
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Dec 7, 2009
I'm using Garageband 5.1
I have an electric guitar plugged into the instrument input of an Apogee Duet recording interface.
If I add a "real instrument" track, then I can select the input channel in the "track info" pane in GB. Works fine, I can hear the guitar. But I can't access the various guitar effects and models.
To do that I create an "electric guitar" track instead. However, when I do that, I don't see any option to select the input channel in the track info pane.
And I don't hear any sound. Apple help just says I should "select the input channel in the track info pane" but I don't see it there, like it is for a "real instrument"...
what's going on?
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Apr 3, 2010
Does the current white macbook, with 2GB RAM, come with a single 2GB stick, or two 1GB sticks?
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Jun 17, 2012
Now that the new macbook pro has usb 3.0, is there a way to convert my current macbook's usb 2.0 to 3.0?
Info:MacBookPro
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Jun 17, 2012
I have made a mess of everything to the point where I probably should start fresh and reload everything. Is there some way I could reset to original factory settings?
Info:
MacBook Pro (13-inch Late 2011), Mac OS X (10.0.x)
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Oct 20, 2010
I have MacBook Pro about 17 months old (bought new Summer 2008). According to Coconut Battery, my current battery capacity is 96% after 185 cycles (see below). This was taken just after I re-calibrated the battery last night. I usually work the laptop from the battery ... I rarely leave the laptop plugged in unless charging, and when fully charged I always unplug and run the battery down before plugging in again. So, is 96% battery capacity good or bad for a 17 month old MacBook with 185 charge cycles? Is the way I'm charging ok, or is it better to have the MacBook plugged in continuously and have less charge cycles (would this give me a better battery health %)?
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