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Electronics Repair (sci.electronics.repair) Discussion of repairing electronic equipment. Topics include requests for assistance, where to obtain servicing information and parts, techniques for diagnosis and repair, and annecdotes about success, failures and problems. |
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#1
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I could take home a pc from work. It's a Thinkpad with a 1,7 Pentium
CPU. It works very well except for a quite frustrating problem. Its lan connector can't mantain a stable connection. As soon as a lan cable is plugged into it it start to continuously getting ON and OFF the network. This happens with Windows XP, but it also happens using a Linuc livecd, and with different lan cables, so I guess it's a hardware related problem. Do you happen to know if this is easily fixable or what may cause it? Thanks a million in advance. |
#2
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It's fixable. You will have to take the computer apart, and see if there are
any cold solder connections. You will need the proper soldering tools, and skills to re-solder the connector pins at the circuit board. If the connector itself is defective, many of these are standard PC mount type connectors. You will have to match it up to a proper part number using the connector listings in the proper catalogue. There are many electronics parts suppliers that can supply these connectors. You may have to buy a minimum size order to buy the connector. To change the connector, you will still require the proper soldering tools and skills. Removing the old connector without damaging the board is a task in itself. Your best bet would be to bring the computer to a service centre that is able to change these types of parts and service computers. The greatest cost will be for the labour. If you don't want to fix the connector problem, if the computer has a PCM slot for external options, you can buy a PCM type network card, and install it as your Ethernet connection. I have seen these PCM Ethernet cards going for about $40 to $70 US depending on the type and quality. There are also USB-2 to Ethernet adaptors. I found that these are not always the best solution. They tend to have speed problems at times and sometimes other issues, but usually they do work. -- JANA _____ " wrote in message ups.com... I could take home a pc from work. It's a Thinkpad with a 1,7 Pentium CPU. It works very well except for a quite frustrating problem. Its lan connector can't mantain a stable connection. As soon as a lan cable is plugged into it it start to continuously getting ON and OFF the network. This happens with Windows XP, but it also happens using a Linuc livecd, and with different lan cables, so I guess it's a hardware related problem. Do you happen to know if this is easily fixable or what may cause it? Thanks a million in advance. |
#3
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Meat Plow wrote:
On Tue, 22 May 2007 02:13:59 -0700, wrote: I could take home a pc from work. It's a Thinkpad with a 1,7 Pentium CPU. It works very well except for a quite frustrating problem. Its lan connector can't mantain a stable connection. As soon as a lan cable is plugged into it it start to continuously getting ON and OFF the network. This happens with Windows XP, but it also happens using a Linuc livecd, and with different lan cables, so I guess it's a hardware related problem. Do you happen to know if this is easily fixable or what may cause it? Thanks a million in advance. Just buy a pcmcia or usb ethernet connector and forget about the built in lan. First thing I'd do is take a peek inside the socket. make sure the wires that form the connection are not bent and can make firm contact with the right part of the plug. Sometimes people try to plug the phone wire in there and bend things. Not sure how the pins line up, but the 50V on the phone wire is not ethernet friendly... Then, I'd take a Q-tip and some alcohol to try to clean off any gunk in there. Then I'd put an oscilloscope on a tap at the other end of the wire and see if anything interesting shows up. It's always possible, but if you don't touch anything and it's going on and off, it may not be the connection. Putting pressure in one direction or another may or may not make the problem better or worse, but it's an experiment worth trying. -- Return address is VALID! Bunch-O-Stuff Forsale He http://mike.liveline.de/sale.html |
#4
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" wrote in
ups.com: I could take home a pc from work. It's a Thinkpad with a 1,7 Pentium CPU. It works very well except for a quite frustrating problem. Its lan connector can't mantain a stable connection. As soon as a lan cable is plugged into it it start to continuously getting ON and OFF the network. This happens with Windows XP, but it also happens using a Linuc livecd, and with different lan cables, so I guess it's a hardware related problem. Do you happen to know if this is easily fixable or what may cause it? Fixable. Buy a USB-ethernet adapter and plug it into the USB port. Disable the on-board ethernet device. Or buy a PCmcia card ethernet adapter. If your computer doesn't have USB or PCMCIA capability, it is too old to be useful for most purposes. Alternately, replace the mother board. -- bz 73 de N5BZ k please pardon my infinite ignorance, the set-of-things-I-do-not-know is an infinite set. remove ch100-5 to avoid spam trap |
#5
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Thanks everybody for the replies
![]() I'll let you know if I could fix it (or have it fixed... ![]() |
#6
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#7
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In article efB4i.8772$qp5.2435@trnddc03, mike
wrote: Meat Plow wrote: On Tue, 22 May 2007 02:13:59 -0700, wrote: I could take home a pc from work. It's a Thinkpad with a 1,7 Pentium CPU. It works very well except for a quite frustrating problem. Its lan connector can't mantain a stable connection. As soon as a lan cable is plugged into it it start to continuously getting ON and OFF the network. This happens with Windows XP, but it also happens using a Linuc livecd, and with different lan cables, so I guess it's a hardware related problem. Do you happen to know if this is easily fixable or what may cause it? Thanks a million in advance. Just buy a pcmcia or usb ethernet connector and forget about the built in lan. First thing I'd do is take a peek inside the socket. make sure the wires that form the connection are not bent and can make firm contact with the right part of the plug. Sometimes people try to plug the phone wire in there and bend things. The 8-pin jack is specifically designed so that the 4-pin plug can be inserted; it's intended for that. The middle 4 connections will go through. Isaac |
#8
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isw wrote in
]: In article efB4i.8772$qp5.2435@trnddc03, mike wrote: Meat Plow wrote: On Tue, 22 May 2007 02:13:59 -0700, wrote: I could take home a pc from work. It's a Thinkpad with a 1,7 Pentium CPU. It works very well except for a quite frustrating problem. Its lan connector can't mantain a stable connection. As soon as a lan cable is plugged into it it start to continuously getting ON and OFF the network. This happens with Windows XP, but it also happens using a Linuc livecd, and with different lan cables, so I guess it's a hardware related problem. Do you happen to know if this is easily fixable or what may cause it? Thanks a million in advance. Just buy a pcmcia or usb ethernet connector and forget about the built in lan. First thing I'd do is take a peek inside the socket. make sure the wires that form the connection are not bent and can make firm contact with the right part of the plug. Sometimes people try to plug the phone wire in there and bend things. The 8-pin jack is specifically designed so that the 4-pin plug can be inserted; it's intended for that. The middle 4 connections will go through. Yep, but a phone cord doesn't *work* worth a darn in place of a cat-5 cable. I was called to check the ethernet drop in a room because they couldn't get a link light. I had to explain to them that the telephone extension cord they were trying to use was NOT an ethernet cord. ![]() -- bz 73 de N5BZ k please pardon my infinite ignorance, the set-of-things-I-do-not-know is an infinite set. remove ch100-5 to avoid spam trap |
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