Hello, I am new to the forum and am having an issue with my SC7500 RIP, which is connected to my GR3770. I purchased both items used.

I have it linked up to the GR3770 with the proper SCII cable. The "POWER of RISOGRAPH" light is lit up green.

When I turn it on, it quickly beeps a few times, and the top "DATA/ERROR" LED blinks red and green as part of the normal initialization. After it initializes, though, the light remains red instead of green. It remains this way for a few minutes, but then audibly beeps twice, and restarts the initialization. This process repeats indefinitely and it never fully boots to the point where all three LEDs are green.

I cannot print a test page to the GR3770 by holding the reset button, or "factory reset" the RIP by holding the reset button: this always results in LED blinking red and green again, as it restarts its initialization process.

I've taken it apart, dusted it, and the connections seem fine.

The RISO prints on its own properly.

Is there any way to diagnose the issue, and narrow it down to hardware or software? The SC7500 "Technical Administrator Manual" apparently describes the meaning of the audible beeps, but I haven't been able to find that specific manual anywhere.

Any help would be really appreciated! Also, I apologize if posting in English is not allowed. I saw a user post a message using Google Translate and the moderator said he would prefer messages be written in plain English instead.