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  1.    24 May 2017 #1
    Join Date : Feb 2017
    Posts : 33
    Windows 10 64bit

    PC SPeaker Not Beeping but PC boots fine??


    Hey Guys,

    I have a small problem with my new motherboard. I installed all the components and it boots just fine the problem is I have the internal PC Speaker hooked up but it does not do the initial beep on startup..

    The PC boots and works fine I just don't get the initial beep upon startup.. I have checked the port and am using theorrect one JFP1 which is for the Internal speaker..

    The new motherboard I have is a MSI Z270 SLI.. I am on Windows 10 64bit Home and it is activated and legal..
    I was wondering what could cause t too not beep when all is working fine??
      My ComputerSystem Spec
  2.    24 May 2017 #2
    Join Date : Aug 2014
    Forever West
    Posts : 3,922
    Win10 Home and Pro, Win10 Insider Preview, Win7 Home, Linux Mint

    Not all computers have the beep. When things don't always work fine and I get beeps is when I worry. I have seen some of those internal speakers get plugged in backwards and some that did not have sufficient volume to be noticeable. I usually test the speaker by removing the RAM modules, always causes beeps if everything else is okay.
      My ComputerSystem Spec
  3.    25 May 2017 #3
    Join Date : Aug 2015
    Posts : 611
    W10 Home 1703

    As Berton mentioned, the Speaker plug is one that must have the correct +/- orientation. Common error.
    Try turning it 180 degrees and test.
      My ComputerSystem Spec
  4.    26 May 2017 #4
    Join Date : Feb 2017
    Posts : 33
    Windows 10 64bit
    Thread Starter

    Well I tried the plug both ways, I do not get an initial One beep upon bootup.. I will try it with the memory sticks out to see if maybe the PC SPeaker is broke..
    '
    thnx..
      My ComputerSystem Spec
  5.    26 May 2017 #5
    Join Date : May 2015
    Posts : 1,645
    Win 10 X64 Pro 15063

    These are the pinouts for the front panel header on your motherboard:Click image for larger version. 

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    Stupid question: do you have it plugged in correctly? If it is all the way to the end of the header block, that's incorrect. Need to be back 1 pin (so the ends of the 4 pin connector are at +5v and Speaker).

    I'm not sure that the speaker is polarized. Front panel LEDs, sure.
      My ComputerSystem Spec
  6.    27 May 2017 #6
    Join Date : Dec 2013
    Sydney, Nova Scotia, Canada
    Posts : 10,413
    Windows 10 IoT

    A PC speaker has no polarity, it doesn't matter which way you plug it in. Piezo buzzer is the same deal as far as I know. I have one right here in front of me and there are no polarity markings on it. Both leads are that same length too. Your stereo speakers may have a + and - on them but that's just to get them in phase. Nothing bad happens if you reverse it. They still work.
    Front panel LED's are polarized and won't work if you get them reversed. The switches aren't though.

    Why you don't hear a beep, I don't know? Either the speaker is defective, or connected to the wrong pins. Off by one pin left or right maybe? Other than that check the various BIOS settings.
      My ComputerSystem Spec
  7.    27 May 2017 #7
    Join Date : Aug 2015
    Posts : 611
    W10 Home 1703

    Quote Originally Posted by alphanumeric View Post
    A PC speaker has no polarity, it doesn't matter which way you plug it in.
    I always believed that too Alpha. Until I got this new Asus board, which came without a speaker. I got a piezo out and plugged it in - nada. Figured, what the hey, turned it around and BEEP.

    I recall I tried a "real" PC speaker in one of my modern boards and it did not work, but a piezo speaker did. I suspect that modern boards don't put out enough power to drive a "cloth and magnet" speaker.
      My ComputerSystem Spec
  8.    27 May 2017 #8
    Join Date : Dec 2013
    Sydney, Nova Scotia, Canada
    Posts : 10,413
    Windows 10 IoT

    A "cloth and magnet" speaker has no polarity. It's normally driver by an AC signal, not DC. The piezo is more suited to a DC (digital) signal. There are piezo buzzers, and piezo elements. Piezo elements can produce sound and be used as a transducer. The buzzer can't, it will only produce sound. I see that this one has a polarity indicator, https://www.adafruit.com/product/1536, but this one doesn't, https://www.adafruit.com/product/160. I have the second one here on my desk in front of me. If the ones with a polarity indicator have a DIOD inside that would explain why they don't work when plugged in backwards. I've been out of the loop for a while now so my electronics knowledge gets a bit rusty some times.

    In the early days of PC's the motherboard would actually send an audio signal to the "PC speaker". It was a real speaker. Nowadays a lot of the time, all it sends is a beep, (pulse) via a digital signal (square wave). Piezo buzzers are smaller and cheaper than a regular speaker, so guess which one they use?

    EDIT: Looking at the description for the one I have it says " Piezo buzzers are used for making beeps, tones and alerts. This one is petite but loud! Drive it with 3-30V peak-to-peak square wave. To use, connect one pin to ground (either one) and the other pin to a square wave out from a timer or microcontroller. For the loudest tones, stay around 4 KHz, but works quite well from 2KHz to 10KHz. For extra loudness, you can connect both pins to a microcontroller and swap which pin is high or low ('differential drive') for double the volume.
      My ComputerSystem Spec
  9.    27 May 2017 #9
    Join Date : Aug 2014
    Forever West
    Posts : 3,922
    Win10 Home and Pro, Win10 Insider Preview, Win7 Home, Linux Mint

    Quote Originally Posted by TV2 View Post
    I always believed that too Alpha. Until I got this new Asus board, which came without a speaker. I got a piezo out and plugged it in - nada. Figured, what the hey, turned it around and BEEP.

    I recall I tried a "real" PC speaker in one of my modern boards and it did not work, but a piezo speaker did. I suspect that modern boards don't put out enough power to drive a "cloth and magnet" speaker.
    It does appear that polarity is important. The posted diagram by bobkn at #5 does show + and - for the speaker plug. Looking at the manual for my Gigabyte GA-MA785GPM-UD2H and GA-770T-USB3 boards also shows the polarity for the speaker in the same manner as bobkn's diagram. If a device has been built correctly the red wire is + and the black wire is -. Control/sensor wires such as on fans will be another color such as yellow or white.
      My ComputerSystem Spec
  10.    27 May 2017 #10
    Join Date : Dec 2013
    Sydney, Nova Scotia, Canada
    Posts : 10,413
    Windows 10 IoT

    If what your plugging into the speaker header has a RED and Black Wire, connect the RED to the PIN ladled +5V and the black to the one labeled GRD. I still don't think it matters, but I don't have an actual PC speaker/buzzer here to look at. The piezo buzzer I have is for plugging into a solderless bread board or soldering to a circuit board. It's ambidextrous Wouldn't be the first time I got something wrong though.
    The original PC speakers (real speaker not buzzer) had Red and Black wires on them too, it didn't matter which way you plugged them in though, they still worked. The colored wires were just there so people wouldn't ask which way do I plug them in.

    Anyway, the quick way to sort it out, since its not working now, is to just reverse the plug. If it then works discussion over, I got it wrong. If it still doesn't work its either a dead buzzer, of something not right with the motherboard.
      My ComputerSystem Spec

 
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