09-23-2013 03:47 AM
When I plug my Lenova Yoga 13 into the mains to power, there is very audible buzzing noise coming from the heaphone output. This happens both with unpowered headphones as well as externally powered speakers that are plugged in on the same strip.
The headphone issue is the one that is a particular concern as I can't understand why there might be grounding issues?
I'm a UK user. Is this an uncommon issue?
09-23-2013 12:34 PM
09-24-2013 01:20 AM
Nothing else plugged in. Just the mains connection.
I don't buy into blaming the mains circuits as this doesn't appear to be a situation on other peoples laptop computers here so what are the possible issues within the machine and power supply itself?
Any ideas greatly appreciated.
09-24-2013 02:07 AM
I tired on my Yoga and I hear no hum, with or without the power supply connected.
As you only get the hum when the power supply is conected I suggest you try another power supply.
09-26-2013 03:21 AM
Yup I get the same buzzing noise. but only when the battery is at 100%. So if i'm listening to music I disconnect the mains supply for a bit until the battery goes down to 50% then reconnect it.Bit annoying but I can live with it.
I have noticed that if you put the charger half way in and touch the metal shielding on the connector, this reduces the noise.
09-26-2013 03:45 AM
Out of interest does the hum alter if you insert the figure-of-eight mains lead into the power supply the oposite way around? (So in effect you are swapping over the live and neutral connections.)
10-02-2013 09:01 AM
Doesn't matter which way I plug it in, I am still getting buzz.
There doesn't appear to be any shielding that I touch that earth's the connection, its just a constant. Would a new power supply make any difference? If so... why would it make a difference?
10-02-2013 12:18 PM