I recently found an Indigo2 with broken PSU and I'm trying to resurrect it. So far, I managed to fix the PSU and not the I2 powers up. Next step is running diagnostics via serial console for I have no 13W3-VGA adapter (a SolidImpact board is installed). If the hardware should show to be still in good shape from a functional point of view, I'll get a video adapter and try to install some unix-like free OS. I was considering netbsd for it seems to support IP28 pretty well, unless I manage to install Debian/MIPS first.