Originally Posted by
filmplane
Trying to diagnose an error beep on a SC7900 computer interface. Here is a video of it booting up:
As you can hear, there is an audible error beep and no indicator lights flashing.
I consulted the tech manual and it says:
Audio Error Signals:
The motherboard generates signals for the speaker to indicate problems, mainly during boot up. If all is okay a short tone will be heard and the boot-up sequence will continue. However if the motherboard detects an error the speaker will sound with several 'beeps'. In this case the boot-up will halt. The problem may be with the motherboard, the processor, RAM or any device attached to the board.
I have factory reset the unit and also attempted to print a test page and no success.
I also tried to isolate the component that might be causing the issue, starting with the hard drive. Even with the hard drive disconnected it still makes the beep. I removed the hard drive completely and it mounted via USB adapter on a windows computer with no issues.
From there I removed each board component, one at a time (ethernet board, the main Riso connector board, and also RAM). Still the same beep and no indicator lights.
I checked for any other loose connectors. I also removed RAM completely and got a different longer repeating beep.
All of these did not produce anything other than the beep shown in the video above. Is there anything I am missing I can test or is this unit’s motherboard fried?
Thanks for any help or advice!
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