Blu ray cuts out TV signal

ash_scotland88 · 5 Jan 2019 at 22:24

Recently and sporadically when the blu ray turns on (for the surround sound) the TV loses signal. It used to be fine and nothing has changed so confused to what could be causing this.

Any suggestions or ideas?

lucid · 5 Jan 2019 at 22:57

Needs more detailed explanation really, such as whether you're watching via the aerial cable or HDMI. However, a couple of quick thought are that the switch-mode power supplies in most bits of consumer gear are pretty dirty, and as they age they really start to kick out a fair bit of interference. This is picked up by poorly shielded aerial coax fly leads and poorly shield HDMI cables. Because the signals flowing through them are digital, and of small amplitude, the interference has the effect of swamping the signal.

If it is that you're watching Freeview, and the connection to the TV is via one of those moulded flyleads, then they're notorious in the trade for this kind of issue. A piece of decent shielded coax and a couple of plugs will cure the problem until the power supply in the Samsung surround kit is ready to crap out completely. Ditto for HDMI cables. Buy something thicker and better shielded.

ash_scotland88 · 5 Jan 2019 at 23:24

Watching through aerial Freeview HD. The Co-ax should be decent stuff, just checked and it's NX100.

And it's an LG all in one. We're not (aka he's not) big AVfiles. Not sure on the hdmi spec but they're fairly chunky braided stuff but I had nothing to do with speccing them.

It's just weird it's only started to happen.

lucid · 6 Jan 2019 at 00:15

Check the fit of the coax plugs.

Problems with switch-mode power supplies develop over time.

As a test, try moving the main unit of the LG surround system away from the TV. (You'll have to disconnect some leads). See if you still have a problem when the unit is 5ft away when turned on. Then move it back but don't reconnect the AV and speaker cables. Try powering up again.