MacBook Pro 13" late 2011 sound not working.

There is no red light in the headphones input, nor anything I can do with sound and MIDI. It says that I use my internal speakers. Despite this, the startup sound does still function.
Any help I could get would be very appreciated!

Go step by step and test.
1. System Preference > Sound > Output > Internal Speakers
    Highlight Internal Speakers.
    Make sure that Mute is not enabled.
2.Plug in and remove the headphone.
3. Reset PRAM. http://support.apple.com/kb/PH4405
4. Reset SMC.     http://support.apple.com/kb/HT3964
    Choose the method for:
    "Resetting SMC on portables with a battery you should not remove on your own".
Best.

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I would say that odds are high that you have a bad cable. Maybe that is why they returned it.
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Here is a link.
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Hi!
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<http://eshop.macsales.com/item/NewerTech/VIDU2DVIA/>
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<http://www.displaylink.com/support/mac_downloads.php>
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cdh0127
Re: Macbook Pro 15" Late 2011 - Running Extremely Slow
09-Mar-2013 23:49 (in response to pennbank)
I know how computers work.
Oh Sorry Thought you were asking for assistance in solving a problem with your computer

Macbook pro 17" late 2011

Macbook pro 17" late 2011
events :
1. installed mavericks online through internet
2. computer restart and screen went off ( black screen ) with sound, dvd, keypad, battery signal everything works find
3. Try command R and works, going to recovery and try re install the mavericks os.
4. After finish downloading, restarting again.
5. screen went off again with same condition as Events 3.
6. Did the command R again, but this time i'm putting firmware password while on the recovery option (command R)
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7. After this events (events 6). Command R, Command Option P+R, Command Option F+O, all other shortcut wont work?
Please help !!!!!!!,

I suggest that you boot the MBP OPTION+COMMAND+R. The display should show a revolving globe. This will connect you to the Apple servers and will allow you to install the original OSX. You will need a solid Internet connection.
Ciao.

What is the max memory allowed on a macbook pro 15" (late 2011), and what speed is the max speed allowed?

Hello,
I own a Macbook Pro 15" (late 2011) and I would like to upgrade the memory. I want to go with two 8gb sticks but if the motherboard only supports 8gb then I will have to stick with 8gb. Also, the ram that I have in currently, which is the 4gb that came with the mac, is 1333 Mz. Would I be able to upgrade to 1600 Mz on this laptop?

Max is 16 GBs. Do not attempt to use memory with specs that differ from those required by your hardware.
Maximum Memory
16 GB (Actual) 8 GB (Apple)
Memory Slots
2 - 204-pin PC-10600 (1333 MHz) DDR3 SO-DIMM

MacBook Pro 15" Late 2011 Problems with iMac 27" Late 2009 TDM

Hi,
I just got problems with my iMac 27" Late 2009 (Mini-DisplayPort) and my MacBook Pro 15" Late 2011 (Thunderbolt).
When I try to use my iMac as external monitor for my MacBook, there are massive glitches and graphical bugs on my second screen.
I bought a MDP-to-MDP wire from Belkin which works perfect on other computers.
I tried these things:
- Disconnected MagSafe from MacBook + unplugged all USB devices + switched graphics to discrete.
- Shut down all computers ... then booted MBP, iMac and triggered CMD+F2
- SMC, PRAM reset on both devices
The cable works, because:
17" MacBook Pro Late 2011 works perfectly on my iMac screen with my Belkin wire!
I connected my MacBook Pro 15" to a 27" Cinema Display and it works flawless.
After that I plugged it out and tested it again with my iMac screen -> suddenly it works.
Retriggering CMD+F2 or replugging breaks it again with massive bugs.
The MacBook Pro 17" is on 10.7.2, 15" is on 10.7.3, but I also tried to trigger dual screen in 10.7.0 setup with the same issue.
Maybe its a problem with the internal 6750M of my MacBook Pro 15"?
The 6770M of the 17" is working well.
Sample Video:
http://www.youtube.com/watch?v=W_pgc52syes
All updates/firmware updates of iMac and MacBook Pro are installed.
Any solutions?
Greets,
Kai

Since this is a user to user forum with no employees participation, your plea is a good a screaming into the wilderness. I suggest that you post your thoughts here:
https://www.apple.com/feedback/

MacBook Pro 13" late 2011 sound not working.

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