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Actually I'm glad this is coming up, I need to recap some dead LCD monitors, and they've been off for months, but I'm still nervous. Is there any way to safely discharge a cap? Maybe like build some basic circuit and hook it to the leads and let it drain? e. I mean the dead caps likely won't have a charge, but the recap kits I saw replace multiple caps and I'd like to drain the ones that aren't dead while I'm in there
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Mar 15, 2016 23:56
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Casimir Radon posted:Do you really have to do more than pull the cord and push the power button a few times? Yeah, you have to actually discharge the capacitor from the rear, unplugging it pressing buttons or whatever won't do it. Otherwise it can take years to fully drain on its own. There are safe ways to do it, but I've seen arcade guys do some poo poo where they short the anode to the cathode with an insulated screwdriver or something equally dumb. So yeah, Code Jockey, do as much research as possible on safely draining it. Probably some instructional vids on youtube or something. And then be like Vinny and hose down your CRT out on your driveway.
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Mar 16, 2016 01:13
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yeah just short them with something well insulated from yourself/anything you care about. a bit of wire on a plastic pole or something like that. https://www.youtube.com/watch?v=coW1RHUsf_I&hd=1 this guy knows
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Mar 16, 2016 01:14
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An acquaintance of mine killed himself with a TV on accident and he even knew about the risks. Many Kiddos maybe won't even know, but there was a time where it was actually worth it to repair such a thing (for the average person, not some retro tech collector or something) instead of just buying a new one and there were TV service techs that'd do things like removing a sandwich from a VCR or repairing Grandma's TV. I think that's a job that's completely rendered obsolete. The official job name in my country for the profession was (translated) certified radio- and television technician. That the word "radio" is coming first says already a lot I guess. That were people that actually earned good money with knowledge about electronics and knowledge about which side of the soldering iron to hold. I haven't seen a repair shop like that in years and I doubt they still exist and the few that may still somehow exist probably only sell TVs now. CRTs are a bitch to fix. For example the cathode tube, if you have to remove it from the casing, (thankfully that's not necessary often) has a very strange center of mass because of how it's usually formed and is immensely difficult to handle&easy to drop and cause a huge toxic mess. (+ injuring yourself) For an old computer screen, something you'd have usually standing around at home we might be talking about ~27 kV, that's 27000 V. Usually a well set up TV repair shop has the tools to discharge such a device in a safe fashion but more often than not I've seen "the trick" of brutally shorting it with a big screwdriver at the annode connector to ground. Depending on how charged it is you can get a quite significant arc of several centimeters and even some nice impromptu fusing. Needless to say this also is not good for the tube. The flyback transformer and of course caps will be the most common points of failure in these aging devices , besides maybe needing convergence adjustment, or some repairs in lesser parts around the connectors (broken soldering joints etc.) and I know maybe a few retro gaming fans read this here and want to use a CRT and maybe want to fix one and put "how to fix a CRT" into google and you'll probably get lots of sources. My advice is to not do it. It's dangerous if you don't know what you're doing, even if you do not shock yourself it's even easy to do something wrong and start a fire, or you can break it even more and some things might only be fixable while the unit is running, also you'll probably not even have an isolation transformer etc.. just don't do it. Not fun. Try to find some old technician who still learned how to do that. Buy him a case of beer. Be prepared that you won't be able to get the necessary spare parts anyways. They're dying technology, quite literally. Even I would never touch the inside of one again. -- Modern manufacturing technologies&higher integration also mean that things are possible that just wouldn't have been physically feasible with older technologies, even if you'd knew how. It is absolutely amazing how technology advanced in that regard over a few years. This talking about old CRTs reminded me of Amiga video hardware I've still lying around here and it's hugely complicated stuff, boards and boards full of ICs, very high tech, very expensive, for it's time handling "broadcast quality" video signals. Now you have all that sitting inside a tiny area of a tiny graphics chip you can get for $10 off eBay, happly producing better results than any of that old hardware ever even theoretically could. Absolutely crazy. E: Regarding youtube videos about this sort of thing, be very careful about them too. I've seen a youtube video about CRT repair sometime ago (don't remember the circumstances) and already the first thing the dude did was dangerous, stupid and wrong, namingly standing IN FRONT of the CRT while it was running and reaching blindly around into the innards to adjust some pots. (The first thing you learn is with such things to sit behind the unit, put a mirror in front of it and look at the picture it is producing in the mirror - blindly reaching can very quickly lead to touching the wrong things and dying) Things like that. Youtube just like Wikipedia is always to be taken with a grain of salt. Police Automaton has a new favorite as of 02:16 on Mar 16, 2016 |
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Mar 16, 2016 01:45
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i built a computer in 2004 and had to return a bad cpu. it took me half an hour to convince the dude on the other side of the phone that i had indeed tried multiple motherboards and it was almost certainly the cpu. it made me wonder if there are call centers that penalize employees for returns. then after months of part switching i could play unreal tournament and had no more concerns.
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Mar 16, 2016 02:24
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On site TV repair men still exist because it's still hard to transport big flat panels and lots of times they are mounted to walls and such. Usually it's for warranty work. I had a DLP on the fritz back in 08 and Samsung sent repair guys out (contracted from local electronics repair places) five times before they finally gave up and gave me a free LCD tv as a replacement.
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Mar 16, 2016 02:44
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Okay now that I actually think back on how angry/frustrated they made me I'm changing my opinion to "CRTs were objectively worse than ribbon cables." Once I asked for a 17" monitor for Christmas, which was a pretty reasonable upgrade from the aging 15" one I had at the time. Apparently someone at the store hosed up the order and we ended up with a 19" monstrosity made by ViewSonic. When we put everything together we discovered the keyboard and speakers hardly fit on the desk along with it. The desk was eventually replaced by a bigger one we already had upstairs so that was thankfully fixed quickly enough. LCDs were thankfully just becoming standard by the time I went off to college. I picked up a nice Samsung one before heading off. Still though, gently caress ribbon cables.
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Mar 16, 2016 03:40
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Mak0rz posted:Of all the things I'm glad are long gone ribbon cables are at the top of the list. CRTs are a pretty close second, though. They're not gone for some of us, I'm not throwing out my old optical drives just to replace them with SATA. Oh yeah optical drives aren't gone for some of us either  At least I don't have ribbon cables for the hard drives. Still need to get me some of those rounded IDE cables!
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Mar 16, 2016 04:01
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How old is your computer that it still supports IDE?
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Mar 16, 2016 04:03
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My stepdad had a 32" CRT that he gave to some friends kid going to university. He asked if I could help him bring it from the basement because it was 200lbs and awkward as gently caress to move. I helped him bring it upstairs, put it on the tailgate of his truck and headed back inside for a sec to do whatever. In the meantime he figured it needed to be in the box of the truck NOW as opposed to the tailgate and couldn't wait for me, and what better way to accomplish it than roll it so it would save lifting it. By the time I got back about 2 minutes later I was greeted by huge a pile of broken grey and black plastic, wires and a loving bare CRT tube. He said "Whelp, I suppose we'll just take it straight to the dump instead I guess"  Bloody Hedgehog posted:There are safe ways to do it, but I've seen arcade guys do some poo poo where they short the anode to the cathode with an insulated screwdriver or something equally dumb. slidebite has a new favorite as of 04:06 on Mar 16, 2016 |
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Mar 16, 2016 04:03
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You can get a special tool for crimping the ribbon cable connectors onto the cables for like 15 bucks, the connectors cost cents. When you crimp them yourself you can take much higher quality cables (you can buy huge rolls from china) and crimp them at the exact length you want, that already takes a lot of pain away from the usage of ribbon cables. Just with older SCSI implementations you have to be careful, as some controllers can really run into trouble and data corruption if a cable is too short. Not that it matters to anyone but since electronics tinkering has sort of a revival there's an enormous value in being able to make most cable types yourself properly.
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Mar 16, 2016 04:07
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ShiroTheSniper posted:These games... I came here to posy Yoda Stories, I really loved that lovely little game.
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Mar 16, 2016 04:45
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GutBomb posted:On site TV repair men still exist because it's still hard to transport big flat panels and lots of times they are mounted to walls and such. Usually it's for warranty work. Yeah, my parents had issues with their Samsung TV and a repair guy came out and fixed it. Something about one of the parts swelling or something. Anyway that TV still works today, ~8 years later.
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Mar 16, 2016 05:01
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slidebite posted:Isn't using an insulated screwdriver actually the "safe" way to do it? The flyback transformers actually have an integrated very high resistance bleeder resistor (you'd need an amazing multimeter to be able to measure that) but it might only be for the focus power supply or it might not even be there at all especially if it's an older CRT. Also on an already defective unit you should not just rely on things working, as a general rule. How this exactly works and how long you'll have a charge is very dependent on the individual design. A somewhat safer and usually good-enough approach is a good HV Probe on a Multimeter, this still isn't the "canonical" approach and these probes are NOT made for that. There are special kits/tools to discharge CRT tubes like this, or you can build one yourself. The general idea is to not brutally short them against ground but to bleed the charge. It's also a good idea to keep this connected until you reassemble everything as that big honking capacitor is very good at re-gaining a charge alone through atmospheric conditions.
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Mar 16, 2016 05:03
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I have an 8 year old LG LCD tv that still works just like the day I got it. Although I've seen other LGs go kinda bad (picture getting reddish and such) in less time so who knows.
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Mar 16, 2016 05:45
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Cojawfee posted:How old is your computer that it still supports IDE? I checked and holy poo poo this motherboard is 10 years old. Core 2 provides all the power I need for shitposting though
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Mar 16, 2016 11:15
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Cojawfee posted:I would rather use a ribbon cable than do anything with a CRT. I think my parents keep a CRT TV in their family room only because it would be too heavy to get rid of. I remember my dad buying a new family computer, and it came with an LCD screen. The thing looked like it was bowing inwards all concave like  My dad said he saw the same thing too. Apparently if you've spent a few years looking at a CRT screen, your brain gets trained to try and flatten out the image so it freaks out when seeing an actual flat screen.
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Mar 16, 2016 11:44
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There was a bit of Space Cadet Pinball talk a few pages back. And I have been looking for a decent hardware project to do that would teach me a lot. I thought of making a real life version of the game. For fun I googled it and found someone at least started a project but with not updates for 4 years: https://spacecadetpinball.wordpress.com/ Maybe I should continue where they left off?
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Mar 16, 2016 11:51
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After I replaced the last hard drive with SATA in my last computer I replaced the working optical drive just to get rid of the last ribbon cable.
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Mar 16, 2016 11:58
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wayne curr posted:I remember my dad buying a new family computer, and it came with an LCD screen. The thing looked like it was bowing inwards all concave like Same here, except I was tripped out by flat-screen CRT.
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Mar 16, 2016 12:35
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BOFH haha remember this poo poo? seemed so cool when i was a dumbass teenager
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Mar 16, 2016 13:10
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i have no idea if this holds up but i used to think these Detonate.net movie parodies were hilarious when i was a kid: http://attrition.org/archive/www.detonate.net/matrix-orig/01.htm
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Mar 16, 2016 13:11
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blainestereo posted:BOFH Sometimes I can't tell if it was because we were young or the world hadn't discovered humor yet.
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Mar 16, 2016 14:39
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thathonkey posted:I have an 8 year old LG LCD tv that still works just like the day I got it. Although I've seen other LGs go kinda bad (picture getting reddish and such) in less time so who knows. Is this a good place to vent my spleen at "smart" televisions? Whoever thought having a TV with a boot time, that needs updating, can crash and with a software power-off switch was a good idea can go make sweet love to themselves. e: Probably not interesting but I got given a free Sony Trinitron 21" monitor back when CRTs were the thing. It was a sight to behold and weighed a ton. drguildo has a new favorite as of 16:36 on Mar 16, 2016 |
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Mar 16, 2016 16:33
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All "Smart" TVs are garbage, so vent away. They do watch TV and accept outside inputs fine, but everything like apps and stream services are just no.
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Mar 16, 2016 16:57
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I can hardly wait until 3D and interpolating frame rate TVs are relics.
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Mar 16, 2016 16:59
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Smart TVs are an okay concept, but chromecast and roku exist so lol. Even if a Smart TV is good today in two years it's going to lag behind a stand alone device.
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Mar 16, 2016 17:01
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Data Graham posted:I can hardly wait until 3D and interpolating frame rate TVs are relics. Some people like the interpolation, it looks awful as hell.
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Mar 16, 2016 17:09
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It's hard to find a tv now that doesnt have any of the following horribly dumb gimmick features - smart - 3d - hi refresh rate - curved - 4k I just want a regular rear end tv that is big and has good inputs and works well enough i barely even care if its 1080. Im actually in the market for something 37-42 inch or so if anyone knows a good one with no frills.
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Mar 16, 2016 18:57
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thathonkey posted:It's hard to find a tv now that doesnt have any of the following horribly dumb gimmick features 4k and hi refresh rate are good, and eventually there won't be a price premium attached to them.
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Mar 16, 2016 18:58
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High refresh rate has been around for a long time and it makes pretty much everything but sports look worse to me. Also still commands a bit of a premium. And 4k? Is there some commonly accessible media at that res that im missing? 1080 stuff still isnt even that common unless you love bluray and they already have people plopping down money on4k sets
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Mar 16, 2016 19:04
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I like high refresh rates because it makes things look real. 24fps needs to die.
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Mar 16, 2016 19:08
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For high refresh rate it's either confirmation bias or some stupid interpolation processing the set is doing that it shouldn't be doing and which could probably be turned off. 4K barely has a price premium now even if there isn't much (non-porn) content.
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Mar 16, 2016 19:10
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High refresh rate shouldn't change how lower-fps media looks; what you don't like is probably the optional interpolation? 4k is equally harmless future-proofing , and I guess it's nice if you ever plug in a computer?
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Mar 16, 2016 19:11
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Computer viking posted:High refresh rate shouldn't change how lower-fps media looks; what you don't like is probably the optional interpolation? Ah yeah you might be right about interpolation. It's that effect that makes everthing look kind of hyper real and soap-operaish? To me, it makes things look fake like you can tell you're looking at a set. Sorry I'm not up on all the terminology I haven't had a new TV in a long time. 4k does carry a pretty big premium though 
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Mar 16, 2016 19:55
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The cheapo 55" inch sets that WalMart pushes are 4k.
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Mar 16, 2016 19:58
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thathonkey posted:It's hard to find a tv now that doesnt have any of the following horribly dumb gimmick features I got a 60" plasma right as they went off the market. I just wish TVs had more HDMI ports.
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Mar 16, 2016 20:15
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Bonzo posted:I got a 60" plasma right as they went off the market. I just wish TVs had more HDMI ports. Get a receiver and you'll never use more than a couple.
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Mar 16, 2016 20:20
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I tried to show Office Space at a company movie night. The interpolating TV made it look like some guy was just walking around an office with a camcorder. It didn't even look like a "movie", didn't carry any of the "weight" that conveyed to people that they should be paying attention, and everyone else got bored and wandered out.
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Mar 16, 2016 20:22
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my aunt has a Sharp Aquos 3d smart tv blah blah and it was expensive as gently caress anyway the smart bullshit stops working all the time and the only thign to do is unplug it to fix it for a while lol, its garbage. at least i have a plasma with the only "smart' feature being showing jpgs from an SD card
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Mar 16, 2016 20:26
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