Sun SPARCstation LX boot from CDROM?

I removed the PCB off the CDROM drive and on closer inspection noticed a region of substantial corrosion of solder joints on the component side. About 70% of the PCB had solder joints that were nice and shiny like brand new. The remaining section near the front of the drive was quite badly corroded and it also looked like there was some liquid spilled over that section of the PCB (component side). When I tried to re-solder a few of the worst affected components they just fell off and the copper track below them was gone. When heating the solder joint the solder wouldn't melt it was just pure led & tin oxide. Interestingly as I heated the solder joint there was a faint smell like rat urine. I now wonder if 25+ years ago during production of the CDROM at the Sony factory some rodent relieved itself over one or more PCBs and next morning the PCB got assembled into a CDROM drive. It worked for a few years before I put it away in my display cabinet. Slowly over the next 20 years the uric acid corroded solder and tracks. This could not have happened after the assembly because of the small opening in the unit where the caddy is inserted and also because the component side is facing down. Anyway this is the sad end of my Sun CDROM drive. :-( Tom Hunter On Sun, Aug 30, 2020 at 1:23 PM Tom Hunter <ccth6600 at gmail.com> wrote: