Just about had a heart attack while working on POS

purple_minion

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(It is a long post, sorry guys.)

Talk about lucky. I offered to clean the POS computers at work since they were getting gunked up with grease and dust, clogging the heatsinks and ventilation holes. Never worked on a POS before, so the first one I went slow to not break anything (since apparently they were $1200 new, which I find rediculus). Put back together, turn on and it sounds like a cable is hitting the fan blade, take apart twice more and it dawns on me that the fan is on it's last leg, as the bearing is going out on the HS fan.

Next POS on another day 30 minutes apart, cleaned, and back together... another fan making noise but at least I'm not hunting for the issue. Third POS today, should be easy. Take apart, clean, put back together, and it starts trying to boot over the LAN. I saw this one day as I was done cleaning the place and didn't think anything of it... only this time it was in an endless reboot while looking for a server to boot from. Hook up my keyboard and just as I guessed, the HD isn't being detected. Swapping an old one I brought along shows the mine does show up, however theirs does not. I hooked the POS drive via usb AIO adapter to my netbook, and somehow it shows up. I grab an image with partimage and driveimage XML, as I may only have one shot of it working.

While that is going I rig up a HS fan as that one has COMPLETELY seized up, unfortunately my smallest fan is too big, and the screws aren't long enough to even screw down one corner. Well I taped it on, best I could do. Found out that the MB has no over temp sensors as that HS was scorching hot since the fan was toast. I did restore the image to one of my old drives and plugged her in and it came right up.

The date on the drive was from 2001 and these things have been going 24x7, so it doesn't surprise me that these things are dying. I tell you I almost had a heart attack when it didn't boot. The thing that scared me was how do you convince someone that knows absolutely nothing about computers that you didn't do it. Granted I did turn it off to clean it out, and it could have lasted who knows how much longer since it was already running. I have had a few fans and HD that were running fine until you power off, and they just will not start up again. I've looked up prices on newegg and the smallest drive plus fan is $40 plus shipping.

Originally I took the first one apart in the morning because it sounded very weird, which I now know was the fan bearing. However I told the owner how dirty it was and as a preventive measure should spend a little time cleaning it out so as to prolong the life of the components such as the cpu, drive, caps, etc. I suppose things this old are just ready to go at the drop of a hat. I'm sure I did something wrong procedurally, but it seems to have all turned out alright so far.

Also forgot to mention hooking the drive up at home to a computer and it refuses to show in the bios. Apparently I was REALLY lucky or my usb adapter is REALLY good.
 
Wow, lucky you got an image of that hard drive!

Next time you work on POS systems (or any system for that matter) and you see that it's completely clogged with dust, and no obvious maintenance done, make sure you let the client know that additional parts may be necessary. Also, I've been warning clients about impending hard drive failures once they get to be about 4 years old.
 
Wow, lucky you got an image of that hard drive!

Next time you work on POS systems (or any system for that matter) and you see that it's completely clogged with dust, and no obvious maintenance done, make sure you let the client know that additional parts may be necessary. Also, I've been warning clients about impending hard drive failures once they get to be about 4 years old.

Yes, definitely something to remember, much like always bring a keyboard. LOL. I'm still looking for a decent backpack or bag to haul around things, and need to buy a few parts and such like NEW fans and PSU, memory, etc. I thought I'd start close to home, so to speak. I did tell the manager that came in that the longest drive warranties are only for five years, and these are just turning eight. Funny thing is that the company that services them as been out upgrading them last year, and working on speeding up the printing, and none of them so far seem to have been touched, blown out, or anything. Once they are apart it only takes maybe 10 minutes to clean the gunk, as it's really on there. Perhaps they want them to overheat and die to be called out again?

Definitely will have to remember to let them know about unforeseen complications, such as you mentioned additional parts or complete breakage.

I got the ancient server they used before they upgraded so they could use the internet instead of the crap dialup for credit cards, and when I opened it up I think I made the dust bunnies mad... as they poured out.

Also somewhat related, I don't see why a POS can't boot over the lan and have a low powered cpu that wouldn't need a fan, or hd. I'd think it would save them money, and also maintenance as there is no reason it needs to have a drive that just sits there doing nothing for 8 years. I think it could simply be a thin client with a card reader, touchscreen, and printer. Then again I'm new to this so who knows.
 
I've worked on POS for 18 years .... and I know from experience that the dust, grease and all the nastys are what keep them working. Everytime I've cleaned an inside of a terminal ... POW ... PROBLEMS!

Was it a DOS based or Windows POS?
 
@majznw, is it common practice NOT to clean the inside of POS's, that would explain why in this case they where so full of dust.
 
Abe ...

Absolutely! ... It seems that since these systems run 24/7/365 in a rather dirty environment .. the solder gets brittle ... and the dust and buildup ... I've seen about an inch .. seem to protect the board.
Any moving around could break connections.
Best to leave the insides alone .. unless you have to get in there.
 
wouldn't a good cleaning every 2/3 months be good for them. ofcourse once they are in a bad state I would leave them but if they are new isn't it better to keep them clean and dust free.
 
Interesting theory... do they have to prime the POS's before they leave the factory? Perhaps a room with a dust storm/grease fire and let them bake for 30 minutes?

Also they originally were windows 95 systems that got upgraded to windows 2000 last year.
 
wouldn't a good cleaning every 2/3 months be good for them. ofcourse once they are in a bad state I would leave them but if they are new isn't it better to keep them clean and dust free.

That's what I thought, all I did was scrub around the 80mm fan in the impossible place to get at, and basically had to soak the heatsink in degreaser as no amount of scrubbing/water would help. Then snap it all back into place. Apparently I looked at it funny. We'll keep corners of whatnot clean of crumbs, but your $1200 POS, nah... And it is the core of your business when you're a restaurant, I've seen what happens when they go down, it's not pretty... and hard to do business when it's built on the computers.
 
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