Hi everyone,
I'm hoping to get some help with an issue with my setup.
Just got back home after a week away, and now noticed that my speakers are humming/buzzing when I switch on my T777v3 (complete silence in standby).
There was a BluOS update, which I ran yesterday, and I'm pretty sure the humming wasn't present before that - could that be the cause?
The hum is coming from the front towers (PSB Imagine T2s) and the centre speaker (PSB Image C5). It's very audible when I mute the sound, but can also be heard when listening to movies where the characters are whispering.
I have done a power cycle, but no success.
By toggling the ARC settings, the high-pitch buzzing stops, but the humming is still there. The same thing when I disable the Input in the menu.
When I mute the output, some of the buzzing disappears, but the low-frequency humming is still present.
Any suggestions on how to troubleshoot this issue will be most appreciated, thanks.
UPDATE 1:
I just did the following:
- First I unplugged ALL inputs & outputs (HDMI, RCA, etc.), no success.
- Then I disconnected all the speakers, and then reconnected them, no success.
- Then I unplugged the unit from my AC Furman conditioner and plugged it straight into the wall outlet, no success.
- Then I unplugged all the other equipment on the same power line, no success.
- I even switched off the pool and the geyser at the Mains Switchboard to rule out AC interference, still no success.
- When I do a BluOS reset, the version does not change - is that normal?
So, is it the amp then? :help:
UPDATE 2:
Did a factory reset, no luck.
UPDATE 3:
Tried a different wall outlet by running an extension from the kitchen, which is not on the inverter circuit - no change.
Two more tests I ran: the noise is still there even if I switch off the Centre channel in the Speaker setup, and changing the gain on that channel has no effect on the noise level.
So even with the centre speaker disabled, there is still a signal being sent to it, and it seems that signal is constant!?