First post, by seanneko
Does anyone here know much about SPARCstations? I have a SPARCstation LX in the lunchbox form factor which I'm having issues with.
I picked it up in broken/as-is condition. The power supply is pretty much shot due to leaking capacitors which have eaten away at the traces. The motherboard looks fine though and has no obvious damage. I wired up an ATX power supply with what I'm pretty confident is the correct pinout from the official Sun service manual. The only pin I was unsure of was labelled as "POR" on the Sun motherboard. This appears to be a power good signal, but there's no indication of what voltage or signal it expects. I wired it to the power good pin from the ATX power supply which puts out +5v.
After powering up, I don't get any signs of life from it. Poking around the motherboard with a multimeter seems to show the correct voltages on different components, so I'm reasonably sure (but not 100% sure) I've done the power supply right.
If I power up with a compatible monitor and a Sun keyboard connected, the monitor never shows a signal. If I unplug the monitor and keyboard, connect a RS232-USB adapter to the serial port then connect into the serial console, I get no output from it.
Does anyone have tips for troubleshooting one of these things? Are they known for just totally dying like this?