A puddle was found under it; the puddle was cleaned up. The puddle came back. Repeatedly.
The data center management was perplexed. The internal as/400 professionals were stumped. IBM techs were called in. They assured the datacenter’s management that this couldn’t be coming from the hardware. The machines simply didn’t contain yellow fluid.
No leaks in the ceiling, no overhead pipes, it wasn’t coming from the chassis, no other hardware exhibited this weirdness. Food and drink had never been permitted inside. But it was coming from somewhere, because no matter how many times they cleaned it up, another puddle appeared.
When finally a camera was surreptitiously deployed to surveil the afflicted machine, it didn’t take long before the camera revealed one of the datacenter staff members was just walking up to it and urinating on it. No particular reason, just something he felt like doing.