First 8 channels not working?

[tnjazz]

Hello all,

I own a DM4800 with firewire card that has been rock solid for years, now all of a sudden I can't get my first 8 channels to work? My setup is a fixed install with 24 analog inputs and 8 digital and I haven't changed the routing since I got it, but all of a sudden my first 8 M/L don't seem to work at all?

Anyone have any ideas on troubleshooting this? I've got a dynamic mic plugged into channel 1 and I get nothing. Help? Anyone?

 

[Arjan P]

What do you mean with 'don't work'? Faders have no response, no audio coming through, no indication of meters, etc.?

 

[tnjazz]

Sorry, yes I mean nothing whatsoever. No signal, no meters, nothing.

I'm going into channel 1 mic level with a good old SM57 and nothing is happening on the board. Channel 1 is set to M/L 1, and I'm going in at 0 with my gain set around noon. Not even a flicker of activity. The same settings on channel 9 yield meters, levels, etc.

 

[ampsarus]

Have you tried starting a new 'Basic Routing' file in the DM and saving it with a different name?

 

[cmaffia]

This happens with both MIC and LINE inputs?
Is phantom power on or off?

 

[tnjazz]

Going to try it with line input tonight. So far mic inputs are totally dead though.

I've tried a basic new project with the same result, yes. Hoping it's something simple like a ribbon cable that's loose or something, but I have not cracked it open or anything.

 

[ampsarus]

This happens with both MIC and LINE inputs?
Is phantom power on or off?

I believe this is a logic problem not HW.

 

[cmaffia]

If his routing page has M/L on channels 1-8 he should see at the very least his meters registering an input signal. The fact that he can't get it working on a bank of 8 inputs may indicate a HW issue.

 

[tnjazz]

Sorry for the delayed response folks. Thanks for all the input so far!

Line in does not work either on channels 1-8 unfortunately so I'm thinking it's a hardware problem at this point. I'm definitely not too keen on the idea of opening this beast up but I'm not sure what else to do. Any suggestions? I'm not a tech but I am somewhat adventurous!

Does anyone know if there are ribbon cables and easy connectivity inside the board? I could probably reseat any connections like that but anything more I'd definitely have to refer to a professional.