Macbook sound gone, replaced by hiss and whine

So, the sound has gone on my Macbook, now all I get is a weird electrical hiss.
I think I may have smelled an electrical burning when it went, but I couldn't be sure of that.
All I know now, is that instead of sound, all I get with sound set to the speakers is a hiss and a high pitched whine (which seems to come from the left side of the screen hinge), and nothing from the headphone socket. (Although weirdly, the hiss and whine still eminate from the Macbook even with the headphones plugged in)
No red light from the headphone socket, PRAM reset done, unplugged from power, restarted several times, several different sources tried, all to no avail.
So, does that mean the logic board needs replacing?
I sooooo hope not! It's my girlfriends that I'm borrowing as mine is having hard drive issues! Not having much Mac luck at the moment!

I bought a new "made out of a single block of aluminum" MacBook on Oct. 20, and I am having a similar issue. The headphone output (with any headphones, I have tried it with several) has a noticeable and annoying low-level hiss whenever the sound is on. The volume level doesn't matter--the hiss is the same no matter what.
I went to the Apple Store and was hoping that this was an issue with just my computer, but every single other Aluminum MacBook in the store also had a noticeable hiss. Some were more pronounced than mine.
I should mention that it wasn't possible to hear the hiss at the store without using bud earphones and also putting my hands over my ears, so in a somewhat noisy environment, the hiss is hard to detect. But at home or at work, it is quite noticeable and makes having headphones in extremely annoying.
I am hoping this issue will be diagnosed and fixed in the future, although I suspect it is a hardware issue that cannot be addressed easily.

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Macbook pro retina - replaced battery quality and age?

This question is about a Retina MacBook Pro, 15-inch, Early 2013 (MacBookPro10,1). It was originally purchased in April 2013.
I would like to find information about the manufacture dates of batteries, and Apple's policies for hardware repairs and refurbished batteries.
My macbook has just undergone a major surgery (at a certified Apple Support Center) after I spilled coffee over the keyboard.
The logic board was replaced (which includes CPU, GPUs, memory, etc), and so was the the "top case" block.
The "top case", I found, it a unique component that comprises the keyboard, the trackpad and the battery.
I was told that these new components are (generally) refurbished parts provided by Apple, and that support centers don't have any control over their state (new or refurbished).
Now that I have got my macbook back, however, I inspected the system to verify the state of the new components, using a combination of tools and terminal commands.
I am very disappointed to see that I've got a very old battery, as its manufacture date is 2012-07-31 (according to this tool).
Is it ok? It looks like it was a battery used in a previous generation of the macbook pro. Or is it normal that early 2013 Macbook pros had their batteries manufactured in the summer of 2012?
The battery doesn't even seem to perform correctly (or, if it's not the battery, it's the logicboard). I've tried to discharge it completely and then recharge it, but the computer shut down when the battery was just at 18%, with no warning dialog from the OS. I plugged the power cord and resumed my session on the computer, and the battery level appeared to be 16%. I charged it until it reached 19%, unplugged the cord... and the battery level jumped to 25%!
The computer computer then shut down again when the battery reached 17%. I recharged it fully, and now I'm trying again (seems to be behaving more normally, now).
Still, that's odd. The original battery never did anything like that.
If it can be useful, this is my System Monitor App battery report (not charging at the moment, 12% left):
Battery Information:
Model Information:
    Serial Number:      D86230735FLDNMGAY
    Manufacturer:       SMP
    Device Name:        bq20z451
    Pack Lot Code:      0
    PCB Lot Code:       0
    Firmware Version:   511
    Hardware Revision: 3
    Cell Revision:      1150
Charge Information:
    Charge Remaining (mAh):      1122
    Fully Charged:               No
    Charging:                    No
    Full Charge Capacity (mAh): 8487
Health Information:
    Cycle Count:      3
    Condition:        Normal
Battery Installed:   Yes
Amperage (mA):       -2195
Voltage (mV):        10617

Today I brought the macbook back to the service center, where they re-executed the hardware test.
They showed me the resulting graph, that showed that my battery state is "optimal": it was represented as a dot in the top-left corner of the green area, as in this image.
And yet, even though the problem described in the opening post hasn't happened again, I can tell that the battery lasts way less that the old one.
Again, does anyone have any information about the "normal" manufacture dates of macbook batteries?
Is it possible that this battery was designed for a previous generation of macbook pros?

Problems with my keys on my Macbook 2007 after replacing my harddrive and re loading 10.4 software Help !!!

Hi I replaced the harddrive on my Macbook 2007 model all seemed well after I had re loaded my software until i noticed I had lost use of some of the keys.
When I used a key which was working it would repeat continually untill another key was selected , then over a couple of days I lost use of all the keys and now I lost on this issue, I bought an external usb keyboard which initially worked now the keys i select on the external keyboard repeat continually, weird to say the least which leads me to beleive its a software issue not a hardware one as I suspected initially. Can anyone help ???

You could try trashing the appropriate preferences file. (I don't have OS 10.4 on any computer so I cannot verify the precise name.)
Users / yourself / Library / Preferences.
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There is no danger in trashing a Preferences file. It is immediately replaced with a new one.

My Macbook air flash had gone for a month and I saw Apple's Macbook air flash storage drive replacement program. I'm not sure whether that program is still available for the broken device or not. Now, I'm booting from the external hard drive. Thank you.

My Macbook air flash had gone for a month and I saw Apple's Macbook air flash storage drive replacement program. I'm not sure whether that program is still available for the broken device or not. Now, I'm booting from the external hard drive. Warranty has gone in October 2013..
I want to send back my macbook air back to apple store. The problem is that I bought it from US and now, I'm using it in Myanmar. If the program is free of charge for my device, it's worth trying to send back to US. Since mine is broken, I'm afraid Apple will take charges for reparing.
So, if anyone having the same problem as me, I would like to get suggestion....
Thank you!!

I have no idea about how to handle the international aspect of your question.
But here is the Apple writeup about the problem and the remedy. Maybe that will help you.
http://www.apple.com/support/macbookair-flashdrive/

Im having trouble with my magsafe L adapter, i just bought my macbook pro around october-november 2011. just wondering if their still gonna replace it though i lost my receipt already. can i buy just the wire, i mean the "L" not the whole charger?

im having trouble with my magsafe L adapter, i just bought my macbook pro around october-november 2011. just wondering if their still gonna replace it though i lost my receipt already. can i buy just the wire, i mean the "L" not the whole charger?

Punch the computer's serial number here and check your coverage:
https://selfsolve.apple.com/GetWarranty.do

Has anyone with a whinning MacBook got it replaced with a silent one?

Has anyone with a whinning MacBook got it replaced with a silent one?
or
Has anyone got the CPU whine fixed at Apple?

I had a whining week 12 MacBook Pro. I exchanged it at the Apple Store for another week 12 MacBook Pro (they didn't have any week 13 models).
The second week 12 MacBook whined far louder than the first. Also, unlike the first MacBook which whined only on battery power, the second MacBook whined on both A/C and battery. Moreover, it was unstable (something I did not experience with the first MacBook) and prone to kernel panics.
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I had iweb on my last computer - bought a new 2013 macbook pro a few months ago and it's gone. I have a webpage I build on it and now I need to get back in to update it. Help.

i had iweb on my last computer - bought a new 2013 macbook pro a few months ago and it's gone. I have a webpage I build on it and now I need to get back in to update it. Help.

Well of course you won't have iWeb on a new MacBook from this year. iWeb has not shipped on new Macs for a long time now and Apple has not sold iLife through its stores or online for over a year and does not support iWeb any longer.
If you want iWeb now, you will either need to purchase a new copy of iLife or try and find the old install discs from your old Mac and re-install iWeb from that disc. It also depends on what iWeb version you were using too - iWeb 08 or 09? If 08, then this is not compatible with Mavericks which will be running on a new Mac, so you'll need iWeb 09 for this. If you can find your old install discs and they are iWeb 09 then go ahead and use these, but if not, you will have to purchase the iLife 09 or 11 boxed set from Amazon and both of these contain iWeb 09 and you can then install it.
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After logic board replacement and software update, MacBook Pro is spontaneously shutting down and preventing restart. Inconsistent ability to restart after multiple tries. What is going on?

After logic board replacement and software update, MacBook Pro is spontaneously shutting down and preventing restart. Inconsistent ability to restart after multiple tries. What is going on?

Hard drive sensor or logic board failure.
Try a SMC Reset, only thing I can help.
http://support.apple.com/kb/ht3964
Check your tones with this sounds like it's not recognizing the RAM, perhaps it's not seated well or making a bad connection or it's defective.
http://support.apple.com/kb/ht1547
Take it back. three times a charm

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Help--why has MacBook screen gone dark and how do I get it back?

I have a MacBook (model 4,1 running OS 6.8). I use the MacBook as my desktop computer in conjunction with a separate desktop monitor. Today, when I unplugged a USB hub from one of the ports (after carefully ejecting anything on the desktop that needed to be ejected before unplugging), the screen on the MacBook--not the separate monitor--suddenly went dark. I thought it had gone to sleep or into screensaver mode, but noticed that the white light on the MacBook also wasn't showing.
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Can anyone tell me why this happened and how to get my MacBook screen back? I don't know whether unplugging the hub caused the problem or whether it was just a coincidence that something that runs the MacBook display happened to fail right then. Would appreciate any help out there very much--thanks!
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Message was edited by: Turtlewiz

Update: I went away for an hour, and when I came back I saw that the white light had gone on as usual when the MacBook went to sleep. When I touched the keyboard, both displays went on; however, the MacBook display went dark immediately and the white light is still out.

The bottom rubber case of my macbook 13" late 2009 has expanded and has detached from the main body..As i'm not presently under warrantty i wanted to know will the repair be free of charge for me. I had once got it replaced for free but in warranty.

The bottom rubber case of my macbook 13" late 2009 has expanded and has detached from the main body..As i'm not presently under warranty i wanted to know will the repair be free of charge for me. I had once got it replaced for free but in warranty. As i read some where in the support that apple had agreed with the defect and had decided to replace the bottom covers without any charge. And even if i'm charged for it what will be the amount will hav to pay for it..
Thankx

Hi,
Here's the Bottom Case Replacement Link
http://www.apple.com/support/macbook-bottomcase/
It doesn't answer your specific questions about cost... but it does advise to contact an Apple Store or an AASP...
Anyway have a look at it... if you haven't already..
Cheers and Good Luck...

I had a problem with the hard disk on a 2010 macbook pro. Replaced the hard disk with an Hitachi 1TB and when I tried to erase and format It fails with input/output error. Any help much appreciated!

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Zap the PRAM and Reset the SMC, then try again.

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Macbook sound gone, replaced by hiss and whine

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