Hardware & Devices

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Re: LCD monitor - what is important? Trollslayer12-Jun-05 4:08 Trollslayer 12-Jun-05 4:08  Personally I like to look at LCD monitors, the quality of the black level (i.e. how grey is it ?) varies. Elaine The tigress is here USB to PS/2 Luis Alonso Ramos2-Jun-05 8:18 Luis Alonso Ramos 2-Jun-05 8:18  PLEAAAAASEEEE SOMEONE NOTICE THIS FORUM!!! Related to my question below, I remember getting a USB-to-PS/2 adapter one time I got a USB mouse. I'll look for it, but does anyone know if it could work with a USB keyboard? and connected to a barcode reader? Thanks, -- LuisR Luis Alonso Ramos Intelectix - Chihuahua, Mexico Not much here: My CP Blog! Re: USB to PS/2 Shog92-Jun-05 14:38 Shog9 2-Jun-05 14:38  AFAIK, these are specific to the mice they come with - they won't even work with older PS/2 mice. [Edit: you could probably try something like this though.] You must be careful in the forest Broken glass and rusty nails If you're to bring back something for us I have bullets for sale... Re: USB to PS/2 -- solved! Luis Alonso Ramos3-Jun-05 6:27 Luis Alonso Ramos 3-Jun-05 6:27  Shog9 wrote: these are specific to the mice they come with - they won't even work with older PS/2 mice I didn't find that adpater, so I couldn't confirm this. Shog9 wrote: you could probably try something like this though I did. I stopped on Office Depot on my way to the office looking for a USB to PS/2 adapter and I couldn't find any. I bought a PS/2 to USB adapter just in case, and.... it worked!!! I simply plugged the PS/2 barcode reader into that adapter by itself, and I left the USB keyboard as it was; and after a restart, everything worked fine. -- LuisR Luis Alonso Ramos Intelectix - Chihuahua, Mexico Not much here: My CP Blog! Re: USB to PS/2 Mike Dimmick2-Jun-05 23:37 Mike Dimmick 2-Jun-05 23:37  These devices contain special wiring that tell the mouse hardware itself to emit PS/2 signals rather than USB. They don't work with anything other than the original hardware (OK, they probably also work with other mice by the same manufacturer). Stability. What an interesting concept. -- Chris Maunder PS/2 Barcode reader and USB keyboard Luis Alonso Ramos2-Jun-05 7:17 Luis Alonso Ramos 2-Jun-05 7:17  Hello, A good question for this new forum! I have a PS/2 barcode reader I'm trying to make work with an USB keyboard. So far, what I've done is: 1. Turn on the computer with a PS/2 keyboard and the PS/2 barcode reader. 2. After Windows startup, fire up Notepad and read a barcode. 3. Disconnect the PS/2 keyboard and connect the USB keyboard. Everything works fine. But if I try to boot up with the USB keyboard and the PS/2 barcode reader, it won't work. It beeps the first time I read a barcode, but it's not displayed in the screen. After that, it won't read anything. I've also tried booting up with just the barcode reader and plugging in the USB keyboard later. The keyboard works fine, but not the reader. So, any ideas? This has driven me nuts all the morning. -- LuisR Luis Alonso Ramos Intelectix - Chihuahua, Mexico Not much here: My CP Blog! PC Won't Start Up Roger Wright2-Jun-05 3:05 Roger Wright 2-Jun-05 3:05  Here's an odd one... A coworker brought in a relatively new Dell that would not respond in any way to pressing the On switch. I tested the switch - works great. I jumpered the PS-ON pin on the power supply to ground and it fired up perfectly. I reconnected the switch, removed all the loads (disk drives, unnecessary expansion cards, RAM, etc) and tried again - no response. I measured the voltage at the PS-ON connection to the MB while pressing the ON switch - no change. I reported all the symptoms to Dell, having decided the the MB has a problem, and they agreed. A replacement MB and power supply were shipped and installed. The same problem continues. Am I missing something obvious, or is this box infected with gremlins? "...putting all your eggs in one basket along with your bowling ball and gym clothes only gets you scrambled eggs and an extra laundry day... " - Jeffry J. Brickley Re: PC Won't Start Up Marc Clifton3-Jun-05 3:38 Marc Clifton 3-Jun-05 3:38  Roger Wright wrote: Am I missing something obvious, or is this box infected with gremlins? Did you check for continuity in the wires going from the connector to the switch? Also, have you inspected the connector to verify that the little prongs are making contact with the pins on the MB? Probably really hard to do though. Marc My website Latest Articles: Undo/Redo Buffer Memento Design Pattern Re: PC Won't Start Up Roger Wright3-Jun-05 13:40 Roger Wright 3-Jun-05 13:40  Marc Clifton wrote: Probably really hard to do though. Yup! With what I have available, impossible. What I might try, though, when he brings the box back in, is shorting the pins on the motherboard that the switch should connect to. I can get on those - should have thought of it earlier... "...putting all your eggs in one basket along with your bowling ball and gym clothes only gets you scrambled eggs and an extra laundry day... " - Jeffry J. Brickley Re: PC Won't Start Up Trollslayer12-Jun-05 4:07 Trollslayer 12-Jun-05 4:07  Roger Wright wrote: I measured the voltage at the PS-ON connection to the MB while pressing the ON switch - no change Does this mean when you press the power on switch the voltage on the switch line (measured on the motherboard) doesn't drop to ground ? It would be as simple as a dodgy connection and when it's at the angle to fit onto the motherboard the conenction is bad. Oh the joys on intermittent connections The tigress is here Re: PC Won't Start Up Roger Wright12-Jun-05 6:30 Roger Wright 12-Jun-05 6:30  That could be, but there was no way to get on the switch connection other than the connector itself. At the MB end of the switch connection, the signal drops to ground correctly, but at the PS-ON connection to the power supply there is no response. I also removed the switch connector and manually shorted the pins with a paper clip - no response. From the results of this I decided that the MB is probably bad, and contacted Dell support. They walked me through several other steps, then told me that the MB was probably bad. My buddy ordered a new MB and the power supply, then installed them himself. No joy. Ah well, can't win them all, I guess. "...putting all your eggs in one basket along with your bowling ball and gym clothes only gets you scrambled eggs and an extra laundry day... " - Jeffry J. Brickley Re: PC Won't Start Up Graham Bradshaw12-Jun-05 4:21 Graham Bradshaw 12-Jun-05 4:21  We did have a computer here that wouldn't start at all. Very puzzling. No heatsink on the processor (we were building it from bits, and wanted to make sure it worked, and were planning to turn it off straight away, so assumed we could do without the heatsink for testing). Then we put the heatsink on the processor, and it worked. Re: PC Won't Start Up Roger Wright12-Jun-05 6:31 Roger Wright 12-Jun-05 6:31  Now that's just plain weird! It should have at least started, then fried in the first 30 seconds. "...putting all your eggs in one basket along with your bowling ball and gym clothes only gets you scrambled eggs and an extra laundry day... " - Jeffry J. Brickley AMD64 - Socket 754 vs. Socket 939 peterchen1-Jun-05 22:42 peterchen 1-Jun-05 22:42  Now this time, really. What's the difference between the two? Why are there two? Pandoras Gift #44: Hope. The one that keeps you on suffering. aber.. "Wie gesagt, der Scheiss is' Therapie" boost your code || Fold With Us! || sighist | doxygen Re: AMD64 - Socket 754 vs. Socket 939 markkuk2-Jun-05 12:07 markkuk 2-Jun-05 12:07  Socket 939 supports dual-channel RAM, while socket 754 allows only a single memory channel. Re: AMD64 - Socket 754 vs. Socket 939 Dewm Solo9-Jun-05 10:44 Dewm Solo 9-Jun-05 10:44  Socket 754 is the first format that AMD released for the AMD 64 ...it only lasted a few months and they came up with 939. Socket 939 is the current 'De Facto' socket format for AMD and will for a little while as AMD plans to release their new Dual Cores AMD64-X2 processors in that format as well. If you don't already own a 754 motherboard, go with Socket 939. Dewm Solo - C# Developer How do dry joints work? ColinDavies1-Jun-05 12:40 ColinDavies 1-Jun-05 12:40  Or how do they not work? Recently I had a problem with 19" Acer LCD where 1/4 of the screen dissappeared at the bottom. (I mean dissapeared no distortion) When the blonde took it to the purchasing shop it worked for them, then it worked back at her office. Two days later the whole screen disapeared. We got them to replace it and have had no problems since. The tech head said it must be a dry joint. What does that mean ? (No MJ jokes please) Regardz Colin J Davies The most LinkedIn CPian (that I know of anyhow) Re: How do dry joints work? Christian Graus1-Jun-05 12:51 Christian Graus 1-Jun-05 12:51  I believe it means the solder didn't set properly, and as it warms up, the connection is lost. Christian Graus - Microsoft MVP - C++ Re: How do dry joints work? ColinDavies1-Jun-05 15:23 ColinDavies 1-Jun-05 15:23  Ok that makes sense to me, which is why the problems are intermitent. Thx Regardz Colin J Davies The most LinkedIn CPian (that I know of anyhow) Re: How do dry joints work? PJ Arends1-Jun-05 14:48 PJ Arends 1-Jun-05 14:48  ColinDavies wrote: No MJ jokes please What does Micheal jackson have to do with it?;) "You're obviously a superstar." - Christian Graus about me - 12 Feb '03 "Obviously ???  You're definitely a superstar!!!" mYkel - 21 Jun '04 Within you lies the power for good - Use it! Honoured as one of The Most Helpful Members of 2004 Re: How do dry joints work? ColinDavies1-Jun-05 15:22 ColinDavies 1-Jun-05 15:22  Maybe I should have said "No MJ jokes please and no PJ relies." Regardz Colin J Davies The most LinkedIn CPian (that I know of anyhow) Re: How do dry joints work? Roger Allen8-Jun-05 12:32 Roger Allen 8-Jun-05 12:32  Actually its when a leg of a component goes through the PCB and does not get soldered. This causes the two components to only make a connection due to them touching each other. As a PCB flexes and warms up etc, this can cause the components to move and thus break the connection between them. Also, they can be affected by vibration. If you vote me down, my score will only get lower Re: ~ MoustafaS1-Jun-05 10:21 MoustafaS 1-Jun-05 10:21  Pay for it. Re: ~ eggie52-Jun-05 12:04 eggie5 2-Jun-05 12:04  Pay for what? /\ |_ E X E GG Intel or AMD? peterchen1-Jun-05 8:52 peterchen 1-Jun-05 8:52  Pandoras Gift #44: Hope. The one that keeps you on suffering. aber.. "Wie gesagt, der Scheiss is' Therapie" boost your code || Fold With Us! || sighist | doxygen

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