Went to play my PS2 after it sitting for 7+ years and games no longer work, but it worked last time I used it.
It plays DVDs, and CDs, but no DVD games. Games confirmed working/readable in a different PS2.
I've replaced all the electrolytic capacitors on the motherboard and power supply. The only crummy looking ones were the pair next to the USB sockets.
RTC battery is still happy, and time only drifted ~15 minutes over the 7 years.
Eye diagram on the oscilloscope looks good for DVDs, and a tad clippy for CDs. I haven't adjust the potentiometer yet since it reads DVDs and CDs perfectly fine.
This leads me to believe there is some weird lockout happening that I am unfamiliar with

