Internet speed drops when I duplicate my monitor to my TV

  • Thread starter Thread starter ntg
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Yes it is plugged right next to where my tv is plugged. Just as my previous router.

Try moving one of them to a different socket. Interference over the mains is as good an explanation as any. It could clobber this router even if it didn't the last one.

Also is the television networked to the router? That's another obvious path for interference.

Does having the television on as a television have any impact?
 
Yes it is plugged right next to where my tv is plugged. Just as my previous router.



what dif does it make if I go through the screen resolution menu?besides I don't want to change screens, I want to duplicate them.

Presumably to test it with just your TV connected as a screen to see if the same thing happens.
 
Sounds like your phone line is picking up RF interference being generated by the TV itself.

This can happen even when your router is quite a distance from the interfering kit if there are phone extensions around. ADSL filters are meant to reduce this, but you're still dealling with a phone wiring system designed the previous century. The bellwire in your phone cabling isn't needed by ADSL but is great (unwanted) antenna for interference.

I had this with a old microwave which would clobber the internet while my brothers lasagne was doing cooking. Soon as the pinger.. pinged, then the iPlayer would return to normal. Doesn't mean it was leaking microwaves, just good old fashioned RF interference.
Sounds mad, but totally repeatable (with enough lasagnes).

Could be down to the sensitivity of the ADSL chipset in the router. Moving to a Billion router from my ISP supplied one boosted my pitiful 2mb to 2.6mb.

I take it that its not Duplicate/Extend that's the problem, and it doesn't return to normal if you Only have the TV... because that would be even more bonkers.
 
Sounds like your phone line is picking up RF interference being generated by the TV itself.

This can happen even when your router is quite a distance from the interfering kit if there are phone extensions around. ADSL filters are meant to reduce this, but you're still dealling with a phone wiring system designed the previous century. The bellwire in your phone cabling isn't needed by ADSL but is great (unwanted) antenna for interference.

I had this with a old microwave which would clobber the internet while my brothers lasagne was doing cooking. Soon as the pinger.. pinged, then the iPlayer would return to normal. Doesn't mean it was leaking microwaves, just good old fashioned RF interference.
Sounds mad, but totally repeatable (with enough lasagnes).

Could be down to the sensitivity of the ADSL chipset in the router. Moving to a Billion router from my ISP supplied one boosted my pitiful 2mb to 2.6mb.

I take it that its not Duplicate/Extend that's the problem, and it doesn't return to normal if you Only have the TV... because that would be even more bonkers.

that sounds plausible..probably the router internals react to it..bloody thing..
 
Enable duplicate output but keep the actual TV turned off. Does it still happen? If it does it's got nothing to do with interference from the TV.


Sometimes almost similar happens to me when I turn off my PC improperly by cutting power rather than shutting down. It spazzes out the whole network for some reason no packets get routed to anywhere until I turn my computer back on.
 
Have you tried a different HDMI cable from PC to TV. A simple check and probably an unlikely cause but still worth a quick check none the less.
 
What about if the TV is switched on and getting a broadcast TV signal displayed . Does it still drop internet then?

If the TV were dropping noise onto the mains wiring it'd be from the smps so will be fairly low frequency compared with the majority of ADSL signals.

The ADSL filter would not attenuate these signals and besides the signal to the modem is unfiltered. Only the phone signal is filtered.

If the internet works with the TV showing bbc1 or something then its less likely to be the TV power supply. Ideally you'd need to drive the TV with a like for like signal eg 1080p @60Hz.
 
Enable duplicate output but keep the actual TV turned off. Does it still happen? If it does it's got nothing to do with interference from the TV.


Sometimes almost similar happens to me when I turn off my PC improperly by cutting power rather than shutting down. It spazzes out the whole network for some reason no packets get routed to anywhere until I turn my computer back on.


good idea ill try this.

Have you tried a different HDMI cable from PC to TV. A simple check and probably an unlikely cause but still worth a quick check none the less.

that'll be my next move..its just too suspicious that it started happening with the skyhub only.

What about if the TV is switched on and getting a broadcast TV signal displayed . Does it still drop internet then?

If the TV were dropping noise onto the mains wiring it'd be from the smps so will be fairly low frequency compared with the majority of ADSL signals.

The ADSL filter would not attenuate these signals and besides the signal to the modem is unfiltered. Only the phone signal is filtered.

If the internet works with the TV showing bbc1 or something then its less likely to be the TV power supply. Ideally you'd need to drive the TV with a like for like signal eg 1080p @60Hz.

i use the same signal for both - always have. It can't be that as it used to work just fine without any change.
 
Do the tv and laptop support network over hdmi? Could be the tv taking part of the connection or the laptop hooking into the tv's wireless.
 
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Do the tv and laptop support network over hdmi? Could be the tv taking part of the connection or the laptop hooking into the tv's wireless.

Its a desktop, not a laptop. I dont think they do support that. Also no, the desktop is not connecting to the TVs wireless.
 
so i moved the router far away and everything works ok. it was interference from the poor quality sky hub after all.

thx all for the ideas.
 
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