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Monitor cable
I bought a used monitor at a local auction. Its supposed to work, but
is missing the power cable and data cables. The power cable is just a standard computer cable, but that data cable plug on the monitor looks exactly like the one one the computer. 3 rows of pins that total 15 pins. Is this a standard type of cable, or is this something I'll have to order from HP (brand of the monitor)? I'm not sure if you refer to that as a male or female end. My guess would be male since the pins stick out, but the whole end is indented, while the whole end on the computer sticks out. Thanks |
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Monitor cable
On Mar 9, 9:19*am, wrote:
I bought a used monitor at a local auction. *Its supposed to work, but is missing the power cable and data cables. *The power cable is just a standard computer cable, but that data cable plug on the monitor looks exactly like the one one the computer. *3 rows of pins that total 15 pins. Is this a standard type of cable, or is this something I'll have to order from HP (brand of the monitor)? *I'm not sure if you refer to that as a male or female end. *My guess would be male since the pins stick out, but the whole end is indented, while the whole end on the computer sticks out. Thanks standard VGA monitor cable, try surplus outlets. |
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Monitor cable
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#4
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Monitor cable
In message ,
Lostgallifreyan writes: wrote in : I bought a used monitor at a local auction. Its supposed to work, but is missing the power cable and data cables. The power cable is just a standard computer cable, but that data cable plug on the monitor looks exactly like the one one the computer. 3 rows of pins that total 15 pins. Is this a standard type of cable, or is this something I'll have to order from HP (brand of the monitor)? I'm not sure if you refer to that as a male or female end. My guess would be male since the pins stick out, but the whole end is indented, while the whole end on the computer sticks out. Thanks Definitely a 'male' connector, you got it right, it's the pins, never mind housing protrusions or lack of, that define that. Weird that it's got pins on the chassis connector. it might work with a standard VDU extension cable and Not really: standard practice _should_ be that signals come out of sockets (female connectors), whether power or signal; the reasoning being that if signals came out of pins, (a) you could accidentally short them together or to ground [and thus damage the electronics that are generating the signals], (b) you could touch live contacts [and thus damage yourself if it's a power lead]. Obviously there have to be compromises with bidirectional connectors like a serial port. a 'gender changer' adapter, but it's worth looking for a manual to confirm. Anything that doesn't have a captive cable usually has quality good enough that a proper manual got written for it. (Is the connector dark blue? If so, it's almost certainly standard VGA. If not, it probably still is.) Is it CRT or LCD? Have you powered it, and if so does it show anything? http://goo.gl/WKZP5 might do you, or http://goo.gl/zgf9z. If it's HP, probably worth looking on their website to see if there's a manual downloadable. -- J. P. Gilliver. UMRA: 1960/1985 MB++G.5AL-IS-P--Ch++(p)Ar@T0H+Sh0!:`)DNAf If you believe in telekinesis, raise my right hand |
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Monitor cable
"J. P. Gilliver (John)" wrote in
: Definitely a 'male' connector, you got it right, it's the pins, never mind housing protrusions or lack of, that define that. Weird that it's got pins on the chassis connector. it might work with a standard VDU extension cable and Not really: standard practice _should_ be that signals come out of sockets (female connectors), whether power or signal; the reasoning being that if signals came out of pins, (a) you could accidentally short them together or to ground [and thus damage the electronics that are generating the signals], (b) you could touch live contacts [and thus damage yourself if it's a power lead]. Obviously there have to be compromises with bidirectional connectors like a serial port. I agree on all those points (and stay with that guidance whenever possible, especially on a small off-grid solar power system I set up here...). But that raises the question of why VDU's break protocol. There's no doubt they do. I have two 17" ELO touchscreen monitors (good price on eBay but their new cost would be beyond most people, not just me). I've seen connectors instead of captive plugs on other VDU's too, and all used female chassis connectors and male line plugs. Same applies on KVM switches. I can think of two reasons: 1, damaged connectors are usually cheaper and easier to replace on cables than on hardware. 2, cables can be connected either end to either end without worrying about a wrong way. Signal electronics should survive a short- circuit, the driving devices are usually chosen for it, most op-amps can cope with this. They may use a low value output resistor to limit current, too. RS-232 is especially tolerant. Not only short-resistant despite using up to +/- 15V, I think it can survive 100V getting shoved up it, though I don't know why anyone would specify that, other than maybe because long lines can pick up inductive and capacitative surges that might manage that high a voltage, and because it's often used in industry, running in ducts with other cables with varied voltages and current in them. (Which is incidentally why USB will never kill the serial port! In industry, USB is probably considered an office toy for use in small, protected rooms. If speed is needed, twisted pair ethernet would be used, or some other resiliant method, according to a sysadmin who showed me round a factory once). On the KVM switch I have, its own supplied VDU cables do have a 'right way round', because they are effectively extension cables, so captive-lead VDU's see their ends (female) as if they were hardware sockets. This is likely why that auction-bought monitor has a male chassis connector. It lets a person use any standard VDU extension cable. ELO's monitors are expensive so they chose to go with the unusual (but standard) hardware convention, and supply their own double male ended cable, which must be used either directly, or via an male-to-female extension as I do it. Both types of cables can be bought on eBay, too. (I had to find a tiny 1-foot long M-F one to make a small 1U rack ITX machine that I built, such that no onboard connectors ever got physical stress in use.) |
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Monitor cable
wrote:
I bought a used monitor at a local auction. Its supposed to work, but is missing the power cable and data cables. The power cable is just a standard computer cable, but that data cable plug on the monitor looks exactly like the one one the computer. 3 rows of pins that total 15 pins. Is this a standard type of cable, or is this something I'll have to order from HP (brand of the monitor)? I'm not sure if you refer to that as a male or female end. My guess would be male since the pins stick out, but the whole end is indented, while the whole end on the computer sticks out. Thanks This is an example of a VGA cable. Looks like a male. http://www.screencapturenews.com/wp-...-connector.jpg This is a VGA connector on a monitor. A female. http://vgatodvicable.com/wp-content/...-connector.jpg By the way, don't freak out if pin 9 is missing, on the new cable you're buying. That's on purpose. Pin 9 carried +5V, from the computer to the monitor. I think the intention might have been, to allow querying the monitor if the monitor was switched off and the computer was running. My pin 9 is missing, and I'm not missing any functionality at all. All works as expected. The +5V obviously isn't needed. http://en.wikipedia.org/wiki/VGA_connector The cable will likely be male to male, for connecting the computer to the monitor. Like this picture. http://images17.newegg.com/is/image/newegg/12-117-638-Z01?$S640W$ If you perhaps, made a mistake, and bought too short a male to male cable, they make male to female extension cords, like this. When a monitor has a "captive cable", like the cable on my current monitor, you can't unplug the monitor end, and then one of these extension cords can be used to make it longer. The longer the cable you use, the lower the resolution you can use on the VGA setup, before it gets fuzzy. 50 feet of cable might drop you down to 1024x768 for example, due to the fall off in high frequency response (you can try a high setting, like 1920x1080, but then it would look fuzzy). As long as you use some common sense, that's not going to be an issue. 6 feet of cable isn't going to hurt anything. But if you want to go from attic to basement, think again. There are low loss versions of VGA cables, but they're priced for rich people. http://images17.newegg.com/is/image/newegg/12-576-021-Z01?$S640W$ Paul |
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Monitor cable
In message ,
Lostgallifreyan writes: [signals out of female connectors into male ones] I agree on all those points (and stay with that guidance whenever possible, especially on a small off-grid solar power system I set up here...). But that raises the question of why VDU's break protocol. There's no doubt they do. I Though it seems the OP has one that doesn't (male [pins] on the monitor end). have two 17" ELO touchscreen monitors (good price on eBay but their new cost would be beyond most people, not just me). I've seen connectors instead of captive plugs on other VDU's too, and all used female chassis connectors and male line plugs. Same applies on KVM switches. I can think of two reasons: 1, damaged connectors are usually cheaper and easier to replace on cables than And male (pins) connectors are more likely to get damaged. on hardware. 2, cables can be connected either end to either end without (I hadn't thought of that aspect.) worrying about a wrong way. Signal electronics should survive a short- circuit, the driving devices are usually chosen for it, most op-amps can cope with this. They may use a low value output resistor to limit current, too. Indeed, though I'd not like to rely on it. RS-232 is especially tolerant. Not only short-resistant despite using up to +/- 15V, I think it can survive 100V getting shoved up it, though I don't know why anyone would specify that, other than maybe because long lines can pick up inductive and capacitative surges that might manage that high a (I have just such experience - we used a BBC model B as a dumb terminal to a VAX, lead running the entire length of a long building. After an electrical storm, we had to replace something in the Beeb. Only happened once.) voltage, and because it's often used in industry, running in ducts with other cables with varied voltages and current in them. (Which is incidentally why USB will never kill the serial port! In industry, USB is probably considered an office toy for use in small, protected rooms. If speed is needed, twisted USB has a pretty short maximum length, too. (You can get extenders, but they have electronics in them.) pair ethernet would be used, or some other resiliant method, according to a sysadmin who showed me round a factory once). On the KVM switch I have, its own supplied VDU cables do have a 'right way round', because they are effectively extension cables, so captive-lead VDU's see their ends (female) as if they were hardware sockets. This is likely why that auction-bought monitor has a male chassis connector. It lets a person use any standard VDU extension cable. ELO's monitors are expensive so they (I think he said the monitor he bought is HP.) chose to go with the unusual (but standard) hardware convention, and supply their own double male ended cable, which must be used either directly, or via an male-to-female extension as I do it. Both types of cables can be bought on eBay, too. (I had to find a tiny 1-foot long M-F one to make a small 1U rack ITX machine that I built, such that no onboard connectors ever got physical stress in use.) I know, I included a couple of links (shortened) in my post. I had to trawl a while to find the male-to-female though - you're right, the male-to-male is commoner. (I did find lots of [short] Y leads, which would have suited your requirement.) -- J. P. Gilliver. UMRA: 1960/1985 MB++G.5AL-IS-P--Ch++(p)Ar@T0H+Sh0!:`)DNAf The main and the most glorious achievement of television is that it is killing the art of conversation. If we think of the type of conversation television is helping to kill, our gratitude must be undying. (George Mikes, "How to be Inimitable" [1960].) |
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Monitor cable
In message , Paul
writes: wrote: I bought a used monitor at a local auction. Its supposed to work, but is missing the power cable and data cables. The power cable is just a standard computer cable, but that data cable plug on the monitor looks exactly like the one one the computer. 3 rows of pins that total 15 pins. Is this a standard type of cable, or is this something I'll have to order from HP (brand of the monitor)? I'm not sure if you refer to that [] This is a VGA connector on a monitor. A female. http://vgatodvicable.com/wp-content/...-connector.jpg I don't think that's on a monitor - it has a symbol of a monitor moulded above it, which wouldn't be likely on a monitor. (Anyway, the OP has confirmed that - unusually - the monitor he's bought has a male connector.) [] http://en.wikipedia.org/wiki/VGA_connector I think that's where you got the above image (-:. [] longer the cable you use, the lower the resolution you can use on the VGA setup, before it gets fuzzy. 50 feet of Well, it's a combination of cable length, cable quality, and drive electronics (and possibly receive electronics). cable might drop you down to 1024x768 for example, due to the fall off in high frequency response (you can try a high setting, like 1920x1080, but then it would look fuzzy). 50 feet of all but the most expensive cable will drop you well below that (-:! It's more "ringing" - you get echoes, especially on vertical lines - than fuzzy, though not that different. [] -- J. P. Gilliver. UMRA: 1960/1985 MB++G.5AL-IS-P--Ch++(p)Ar@T0H+Sh0!:`)DNAf The main and the most glorious achievement of television is that it is killing the art of conversation. If we think of the type of conversation television is helping to kill, our gratitude must be undying. (George Mikes, "How to be Inimitable" [1960].) |
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Monitor cable
In message , MotoFox
confucius-say@enlightenment!to!him!lead!it!for!bangpath!foll ow!man!wise. UUCP writes: And it came to pass that J. P. Gilliver (John) delivered the following message unto the people, saying~ 50 feet of all but the most expensive cable will drop you well below that (-:! It's more "ringing" - you get echoes, especially on vertical lines - than fuzzy, though not that different. [] Inductive and capacitive crosstalk. It's basically the same thing that used to cause the eerie "whistling" noise on analogue telephone trunk lines (noise from adjacent lines bleeds through onto each other. You never were truly "alone" in the old system!) Crosstalk I can understand, but a whistling? That's surely more to do with bounces (reflections) than crosstalk. That can happen on long cable runs. -- _ _ ______________ ___________ __ / \/ \/ __ _ _ __ \/ __ __ \/ / / /\/\ /_/ // // /_/ / __// /_/ /\ \ /_/ \____//_/ \______/ \____//_/\_\ !i84w!exit210!304senye!motofox Blank lines! -- J. P. Gilliver. UMRA: 1960/1985 MB++G.5AL-IS-P--Ch++(p)Ar@T0H+Sh0!:`)DNAf "Mr. Notlob, there's nothing wrong with you that an expensive operation can't prolong!" - Monty Python |
#10
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Monitor cable
"J. P. Gilliver (John)" wrote in
: I know, I included a couple of links (shortened) in my post. I had to trawl a while to find the male-to-female though - you're right, the male-to-male is commoner. (I did find lots of [short] Y leads, which would have suited your requirement.) I'd have had to cut, or stow unused part in space I didn't have (small 1U rack..). Also, I needed a socket end I could adapt easily to a chassis mount. THAT took some extra hunting. Same applied to the short ethernet link... |
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