Solved Problem with Presonus Studio 1824c.

[MC2]

I have a strange problem with interface Studio 1824c. Yesterday everything was working fine. I worked with plugged into MacStudio M2 Ultra - it did not betray any problems.
Today I turn on the computer, and the interface switch button turns red and that's the end of its activity. After switching on, all the input lights on the display blink only once, and lightly highlighted in blue are 48V and Line. On the other hand, no switch works (does not respond to being pressed), and the interface is not visible in the system. Universal Control can't see the interface on both the Mac Studio with Sequoia and the old MacBook Pro with Catalina. Where previously on both it worked without problems.
The question is what else can I do about it?

 

[aoVI]

I had a similar issue on an older Presonus interface (44VSL).

After trying to troubleshoot it I ended up replacing it with an 1824c. On a whim when installing the new unit, I tried using the new power supply from the 1824c on the old 44VSL and it worked perfectly. Apparently the old wall wart wasn't performing up to needed specs.

 

[MC2]

The power supply gives 12.1V and seems to be ok. I did not do load tests.
I still connected a lab power supply instead. At 12V power supply it drew only 0.1A, where the original power supply protects the current supply up to 3A. So I guess it looks like the interface is defective.
Unless someone has another idea?

 

[THW]

Hi there -- Also an 1824C user, though in Windows 11. It's bee an great interface over the years!


I recall a time needing to replace the USB cable. If it doesn't seem to be a power issue, perhaps it's related to the usb-c connection. Have you tried a new usb-c cable?

 

[MC2]

I changed the cable and nothing helped. The next day after booting up the computer everything started working properly.
Somehow the interface is strangely unstable. This is the second time its behavior like this. How can not predict when it will happen.
Earlier it was connected via USB-C now via USB-B and it works.
No less difficult for me to find a pattern of behavior in this.

 

[THW]

Over the last couple of months I have noticed some quirks since updating Universal Control - occasional dropped audio and need to turn off and on the interface or restart the computer. It has gotten better with the last update (it hasn't happened in weeks). However, prior to the release of the new interfaces and the older version of Universal Control -- I really can't recall ever having an issue and all was very stable. I'm not particularly technical, so I don't know if there is any causation here...but it did come to mind there might be some connection there.

My plan is to use the 1824C for as long as I can!

 

[Craig Anderton]

The power supply gives 12.1V and seems to be ok. I did not do load tests.
I still connected a lab power supply instead. At 12V power supply it drew only 0.1A,

100 milliamps seems very low for what the 1824c would require. That seems to imply a hardware problem where either something no longer connects to the power supply, or a crucial component has failed so that it no longer draws current.

Assuming the 1824c has internal connectors, if it was my interface I'd open it up and remove a connector, use contact cleaner on the pins or ribbon (or at least seat/re-seat the connector several times to clean the contacts), then re-insert the connector. I'd do this for all the connectors. It's not certain that would solve your problem, but I've been able to fix several pieces of gear that way over the years, especially when I lived in places with high humidity. I don't know if the 1824c has an internal fuse, but that's also worth checking. Good luck!

 

[MC2]

Support recommended resetting the firmware in the interface to the factory version and upgrading again to the latest one. So far, it is working fine.
So I'll leave disassembling and checking connections to myself for the occasion of the next failure

 

[Craig Anderton]

Wow, that's great! My Studio 192 had a preamp channel go bad and I fixed it with the procedure described above, so yes, put that in your back pocket for future reference

 

[MC2]

And one more question for macOS users.
Is it possible to stably “merge” in Studio One several Presonus interfaces (in this case Studio 1824c and HD8) into “one” so that they can work simultaneously in the program?
Because I'm thinking of upgrading my studio setup and either the 1824c will go on sale, or.... I will have to rethink the subject

 

[haylen8]

I changed the cable and nothing helped. The next day after booting up the computer everything started working properly.
Somehow the interface is strangely unstable. This is the second time its behavior like this. How can not predict when it will happen.
Earlier it was connected via USB-C now via USB-B and it works.
No less difficult for me to find a pattern of behavior in this.

I'm struggling with exactly the same issue as you minus the faint highlights on 48V and Line buttons. I can't get it to register on anything and I can't seem to get it to day anything other than that intial blink of lights as it attempts to power up. The only sign of life is the power button staying red. Have you had any further insights into this issue?

 

[Craig Anderton]

Is it possible to stably “merge” in Studio One several Presonus interfaces (in this case Studio 1824c and HD8) into “one” so that they can work simultaneously in the program?

I use Windows more than Mac, but I've always found the Mac's ability to aggregate Core Audio interfaces as rock-solid. If you don't want to deal with aggregation, I believe the HD8 has an ADAT in. So, send the 1824c's ADAT out to the ADAT in, and you have 8 extra inputs. Choose ADAT sync in Universal Control. This should work - I have a Studio 192 from before I got an 1824c, and use the 192 as an ADAT expander for the 1824c. The 192 doesn't connect to USB normally, but I do need to connect it temporarily if I need to change the sample rate. It's solely an expander unit for the 1824c. Hope this helps.