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Karl Baron
@kalleboo@bitbang.social  ·  activity timestamp 4 months ago

I figured it couldn’t hurt to drop in to HARD OFF on my walk back from the mall.

Wandering through the Junk PC aisle, a double-take, what is that teal beauty on the bottom shelf?

A SiliconGraphics O2? In MY rural Japanese city? How did that get here? The tag showed it had been there for over a week. At $60 I had to give it a home!

Lugging it home in the 31+C heat, squeezing in on the tram and dashing through the rain was a slog but it made it home!

#silicongraphics #sgi#RetroComputing #mb

A SiliconGraphics O2 in a thin HARD OFF plastic bag stood next to tram tracks with some smattering of rain on it
A SiliconGraphics O2 in a thin HARD OFF plastic bag stood next to tram tracks with some smattering of rain on it
A SiliconGraphics O2 in a thin HARD OFF plastic bag stood next to tram tracks with some smattering of rain on it
Shelves of old PCs of dubious value.

In the middle is a SiliconGraphics O2
Shelves of old PCs of dubious value. In the middle is a SiliconGraphics O2
Shelves of old PCs of dubious value. In the middle is a SiliconGraphics O2
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Karl Baron
@kalleboo@bitbang.social replied  ·  activity timestamp 4 months ago

Doing a quick web search, it seems a common fix is to set this jumper on the logic board.

This did nothing either...

Closeup of the logic board. Under the Dallas clock chip is a jumper marked PWR
Closeup of the logic board. Under the Dallas clock chip is a jumper marked PWR
Closeup of the logic board. Under the Dallas clock chip is a jumper marked PWR
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Karl Baron
@kalleboo@bitbang.social replied  ·  activity timestamp 4 months ago

The label at HARD OFF said the LED turned on when powered on, but I was getting zero life. No LED, no fanspin.

First look at the PSU... Well that's a problem.

It was easy enough to unscrew the PSU and re-seat the pin connector. It didn't fix the problem.

When I had the PSU open I also beeped out this fuse which was fine.

Close up of a line voltage fuse inside a power supply
Close up of a line voltage fuse inside a power supply
Close up of a line voltage fuse inside a power supply
PSU pin connector but half has caved in.
PSU pin connector but half has caved in.
PSU pin connector but half has caved in.
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Karl Baron
@kalleboo@bitbang.social replied  ·  activity timestamp 4 months ago

It’s super modular and the bits just slide out! It's a bit scary to when it requires a bit of force on these old plastics...

The SCSI HDD and Optical drive are missing (should be easy to replace), but most importantly, it is populated with CPU and RAM!

Close up of the RAM . Out of 8 slots, 4 are populated.
Close up of the RAM . Out of 8 slots, 4 are populated.
Close up of the RAM . Out of 8 slots, 4 are populated.
Close up of the logic board
Close up of the logic board
Close up of the logic board
Four internal components laid out on the floor - logic board, drive tray, video card, PSU
Four internal components laid out on the floor - logic board, drive tray, video card, PSU
Four internal components laid out on the floor - logic board, drive tray, video card, PSU
The rear of the SGI O2, now with empty cavities where the various ports were
The rear of the SGI O2, now with empty cavities where the various ports were
The rear of the SGI O2, now with empty cavities where the various ports were
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