I got talking with a colleague today about some of the weird things we’ve seen over the years in this business and the weird ways we’ve fixed them. Before working here, he managed a computer store with a large repair department, so he’s got a few stories. As an independent contractor, I have a few as well. I figured I would throw this out to the SW community as well, since I’m sure there have to be some more good ones out there.
The weirdest fix I’ve done was for a computer at the refining plant of a mine. It would randomly behave in very erratic ways. Sometimes it would just freeze up, other times one program that was running would crash but everything else would keep going as if there was no problem. Occasionally when it would freeze, the screen would display a freeze-frame of what looked like analog TV static or the sound card would freak out.
There was no rhyme or reason to when these things would happen, it might happen 10 minutes into the workday with only the Windows and one program running (and not the same program), it might happen with 5 or 6 programs running in the background. I was the latest in a long line of people they had called in to try to figure this issue out.
They didn’t tell me what anyone else had tried. They wanted me to look at it without being tainted by what I thought others had done. I re-loaded Windows once, thinking that it could be corrupt (this was back in the days of Windows 2000, and it had been 2 1/2 years since it had been installed), but to no avail. I ran all kinds of diagnostics only to find very sporadic failures, 90% of the time everything passed, the other 10% of the time the failures were spread across the board. It was very perplexing.
Then it dawned on me what the company mined - metals! Conductive metals!! At the beginning of the refining process, the raw ore is run through giant rollers that crush it down into more manageable sized pieces before going on to be smelted down and separated into the different metals they sell. This creates a very dusty environment.
I shut the computer down, unplugged it, and opened it up to find slightly sparkly dust bunnies the size of large kumquats all over the place inside the case. I pulled one out and touched the probes of my ohmmeter to it. To my shock (pardon the pun) I found that there was about 300k Ohms of resistance in the 1-inch dust ball. There was the answer to the problem! As the fans blew on the dust bunnies inside the computer, they were changing the resistance of the system at random. I blew all the dust out of the PC and it started working just fine. I left feeling quite proud of myself for figuring out such a bazaar issue and with a very pleased customer.
A few weeks later, they called me back. It was at it again. I blew it out again and told them that they would probably have to blow it out every month. They asked if there wasn’t and easier way to deal with the problem because they were really uncomfortable opening it up themselves. I told them I’d think on it for a few days and get back to them if I figured anything out. A couple of days later, I saw a microphone pop screen in a recording studio that had been stored in front of a running fan for several weeks. It was covered with dust, caked with it in fact!
That was my “ah-ha” moment. I bought a cheap pair of pantyhose in the largest size available and went back to the mining company. I asked if they ever used the CD or floppy drives. They said they did, but rarely. I then proceeded to show them the pantyhose and carefully stretched it over the PC tower. I explained what I had seen at the recording studio, and that the material pop screens are made of is the same thing as a pair of pantyhose.
I told them that this setup should filter a lot of the dust out of the air that the fans in the computer were circulating through it, as long as they didn’t mind the weird way it made the PC look and it wasn’t too inconvenient with the removable media drives. They said it was a good solution for them, and they just vacuumed it off whenever it looked like it needed it, which turned out to be about every other week. I still do work for them on occasion, and to this day they still put a pair of pantyhose on their computers.
So there’s my weirdest IT fix - what’s yours, and what did it fix?