Ethernet cable problem
Discussion
3 years ago I installed HDMI over CAT5 for my CCTV. This feeds the HDMI out from the CCTV DVR into my kitchen by CAT5.
Worked fine for that time. About a week ago I started getting "no tx" error in the kitchen. I rebooted the tx and rx and it came back on for about an hour. Now its just stuck on "no tx".
I checked both units and they are actually flashing away like they are getting a signal, in fact if you sit and watch the blank screen in the kitchen the image will flash onto screen for 2-3 seconds then back to "no tx" for half an hour.
I am thinking with all the rain we have had the cable may have some how got water inside it. The cable run is about 30m incl 5m outside. I have visually inspected but as best as I can tell its not obviously damaged.
This is the weird bit. If I plug an RJ45 tester in at the A end it flashes 1.2.3etc but when I go down into the kitchen at the B end its just blank. I have tested my tester with a patch cable and it works fine then, both units flash at the same time so verified the cable. If I unplug the B end the A end transmitter just stops and goes into "g" flashing which AFAIK is correct operation.
What would cause the transmitter on the tester to start flashing like it was getting a closed circuit but nothing at the other side? Surely all 8 cores would need to be touching each other?
Any advice appreciated!
Worked fine for that time. About a week ago I started getting "no tx" error in the kitchen. I rebooted the tx and rx and it came back on for about an hour. Now its just stuck on "no tx".
I checked both units and they are actually flashing away like they are getting a signal, in fact if you sit and watch the blank screen in the kitchen the image will flash onto screen for 2-3 seconds then back to "no tx" for half an hour.
I am thinking with all the rain we have had the cable may have some how got water inside it. The cable run is about 30m incl 5m outside. I have visually inspected but as best as I can tell its not obviously damaged.
This is the weird bit. If I plug an RJ45 tester in at the A end it flashes 1.2.3etc but when I go down into the kitchen at the B end its just blank. I have tested my tester with a patch cable and it works fine then, both units flash at the same time so verified the cable. If I unplug the B end the A end transmitter just stops and goes into "g" flashing which AFAIK is correct operation.
What would cause the transmitter on the tester to start flashing like it was getting a closed circuit but nothing at the other side? Surely all 8 cores would need to be touching each other?
Any advice appreciated!
There are other CAT5 cables on the same run and they are fine. I wonder if making the terminals off again is a good idea just to rule that out, although strange its worked fine for 3 years. I thought it would be the cheapo HDMI over CAT5 box that was faulty but the cable test is just weird.
Well that was a mission.
After testing about 5 cables I decided my ethernet tester was faulty.
So ordered a new one of those. New one arrived and tested the cable run out all ok. Phew.
So assumed it was the actual HDMI to CAT unit. So... ordered one of those. It arrived and unplugged the old unit and plugged the new one in. Nothing. Damn. Lights come on but no signal at the other end.
At this point I went off down the route of testing everything again, testing the units short range (both worked) and started looking at the settings on my TV and the angle of the moon reflecting off swamp gas etc etc…
Almost 4 weeks later today I was sat at my desk thinking and looked over at the box the new HDMI sender came in and saw the shiny new power brick still in its packaging..... couldn't be something as simple as a faulty PSU. Yes, yes it could.
All working perfectly now.
After testing about 5 cables I decided my ethernet tester was faulty.
So ordered a new one of those. New one arrived and tested the cable run out all ok. Phew.
So assumed it was the actual HDMI to CAT unit. So... ordered one of those. It arrived and unplugged the old unit and plugged the new one in. Nothing. Damn. Lights come on but no signal at the other end.
At this point I went off down the route of testing everything again, testing the units short range (both worked) and started looking at the settings on my TV and the angle of the moon reflecting off swamp gas etc etc…
Almost 4 weeks later today I was sat at my desk thinking and looked over at the box the new HDMI sender came in and saw the shiny new power brick still in its packaging..... couldn't be something as simple as a faulty PSU. Yes, yes it could.
All working perfectly now.
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