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Author Topic: No sound on alpha 2 pro  (Read 2763 times)

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Offline eferry

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No sound on alpha 2 pro
« on: January 24, 2022, 06:50:00 AM »
Suddenly lost the sound on my alpha 2 v22/32 machine. Has anyone else had this problem. It was working fine before it stopped. I swapped out the amp board but no change. There is no sound coming out of the audio part on mpu. The audio amp is good. Is there a fuse somwhere thay powers the audio and where is it. Is there a wireing diagram available for this.
« Last Edit: January 30, 2022, 09:02:47 AM by eferry »

Offline eferry

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Re: No sound on alpha 2 pro
« Reply #1 on: January 26, 2022, 12:01:49 PM »
Has any one tried using a external cound card through usb. So i have tried that. Same problem.
« Last Edit: January 30, 2022, 09:04:16 AM by eferry »

Offline dailey

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Re: No sound on alpha 2 pro
« Reply #2 on: February 14, 2022, 05:56:39 PM »
Try swapping or replacing the USB cable from the MPU to the Audio Amp Board.

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Re: No sound on alpha 2 pro
« Reply #3 on: February 15, 2022, 12:03:18 PM »
ok I did that. . Made no difference. Also tried different usb port.

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Re: No sound on alpha 2 pro
« Reply #4 on: February 15, 2022, 02:30:55 PM »
check the RCA digital audio plug from the backplane to the amp board.  It is worth noting that you cannot just change audio devices without doing a clear.  You can try doing a clear on the game.  Boot the game with the USB plug from the amp disconnected and see if it works. You will lose the ability to control the sound volume from the main game menu, but you can change that from the attendant menu. Also you cannot just try and use any USB sound device, the OS doesn't have any drivers for anything that is not a bally OEM part.
If you find the site helpful, consider becoming a contributing member.  It pays for costs and keeps this site alive.  I do not respond to requests for private, one-on-one help. Your questions should be posted in the appropriate forum where they may help others as well.

Offline eferry

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Re: No sound on alpha 2 pro
« Reply #5 on: February 16, 2022, 08:18:36 AM »
there is no rca plug on the back plane board. only the the amp board has rca plugs. They are not used. disconnected the usb plug also. still no sound.

Offline idesign

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Re: No sound on alpha 2 pro
« Reply #6 on: February 16, 2022, 08:32:58 AM »
My guess is he is using a 2.0 CPU with the sound connected to the port on the front of the CPU.  This machine is not a standard Alpha 2, it's a A1 converted to an A2

So if you have a cable connected to the sound port on the front of the CPU, follow it back to where it goes on the other end.  Also, check the continuity of that cable. 

Post photos of the front of the cpu as well as that sound board.  It doesn't sound like you have an A2 sound card installed
If it ain't broke don't mess with it.....

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Re: No sound on alpha 2 pro
« Reply #7 on: February 16, 2022, 11:20:16 AM »

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Re: No sound on alpha 2 pro
« Reply #8 on: February 16, 2022, 01:41:03 PM »
So  I swapped out my back board with the one from my alpha1 machine. same issue.  So at this point its either the computer cpu or the mpu backboard. I have no other parts to swap out. Im at a impass. Don't know what else to do.

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Re: No sound on alpha 2 pro
« Reply #9 on: February 16, 2022, 04:54:43 PM »
That cable with the green end on it is the sound cable.  Did you check that?  From the photo you posted it  looks like it connects to some other cable.  Where does it go?  Have you checked it for continuity?
If it ain't broke don't mess with it.....

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Re: No sound on alpha 2 pro
« Reply #10 on: February 18, 2022, 10:15:45 AM »
bally boards

Offline eferry

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Re: No sound on alpha 2 pro
« Reply #11 on: February 18, 2022, 10:17:08 AM »
additional board

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Re: No sound on alpha 2 pro
« Reply #12 on: February 18, 2022, 10:17:56 AM »
boards

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Re: No sound on alpha 2 pro
« Reply #13 on: February 20, 2022, 08:52:49 AM »
Can I add a a2 sound card. What does it look like or where can I buy one.

Offline idesign

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Re: No sound on alpha 2 pro
« Reply #14 on: February 20, 2022, 08:59:40 AM »
If it ain't broke don't mess with it.....

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Re: No sound on alpha 2 pro
« Reply #15 on: February 20, 2022, 03:25:24 PM »
Where does this board go and how do I install it to the slot
Does it replace another board.


Offline idesign

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Re: No sound on alpha 2 pro
« Reply #16 on: February 20, 2022, 03:43:43 PM »
This is your sound amp, is it inserted all the way?  Try removing it and plugging it back it with the power off.  Could be bad contacts.  However, I mentioned other things to check in earlier comments and you never respond so helping you seems to be a one way conversion here.
If it ain't broke don't mess with it.....

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Re: No sound on alpha 2 pro
« Reply #17 on: February 20, 2022, 04:04:08 PM »
So I have done all the suggestions provided by everyone.
Nothing has worked so far. I have re seated the Amp board and
Even swaped it out with another one. The audio board from happ
Looks different then mine



Offline idesign

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Re: No sound on alpha 2 pro
« Reply #18 on: February 20, 2022, 04:06:51 PM »
The Happ board is for a Alpha 2 Pro, you asked about it
If it ain't broke don't mess with it.....

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Re: No sound on alpha 2 pro
« Reply #19 on: February 20, 2022, 04:27:44 PM »
I was thinking that the happ board would plug in
Somewhere else. The sound board that came
With the machine always worked fine. I believe 
The problem is somewhere else in the machines
The problem started after the audio plug got pulled
Out accidently. Could the problem be comming
From the pc itself.

 

 

 

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