Dear Chris, I wonder if you are operating under warranty, still? If so, please do not open the lid. They will know and will no longer honor a warranty service.
From the manual of the 2020, which I believe includes an 8900 section:
"It is highly recommended that customers do not attempt to troubleshoot their own units or have them repaired at unauthorized repair centers. Opening the case of the unit will
break several manufacturing seals and void the GML warranty--these security measures cannot be readily detected nor easily thwarted, and should be respected wholeheartedly. These measures also act to protect the intellectual property of GML so that we may continue to design high-end professional audio peripherals."
One time, I did open a 9500 eq to see what it looked like. No smoke came out and it worked fine, after. But it was well out of warranty, so I didn't care about losing that. I'll never tell what I saw, however... other than to say it looked so well made, but busy, with lots of parts, that I wasn't sure if it might have a little computer lurking inside, there! (; Not like the relative simplicity of the Sontec layout, iuam.
If you can hang on a few more hours, you can try calling GML in Nashville for advice:
Contact:
Engineering and Technical Support
Nashville, TN USA
615.515.6656 PH
Good luck,
Laars