Slim AC Power Adaptor - clicking noise

[davehinder]

Recently (last 2 months) I purchased a 90W Slim AC Power adaptor to use with my X61 at university. 

For the first few weeks I enjoyed the bliss of having a compact adaptor which could also charge my phone (slim Nokia tip).

But recently, the adaptor has been making a rapid clicking noise whenever the converter 'box' (for want of a better term) it is plugged in to the powerpoint (Australian for the things in the wall which appliances plug in to). 

Also, it appears that the power adaptor will no longer charge my phone. Ultimately it's quite annoying - I use it in lectures, and feel very conscious that it's a rather audible sound. And for $220+ AUD I do expect silence...

Has anyone else experienced this problem? 

Any ideas what might be causing it?

And do I need to keep a fire extinguisher to hand when using it? (IE how worried should I be / will continued use lead to catastrophic damage to anything). 

Any insight appreciated  

Regards,

Dave

[bananaman]

Hi davehinder, and welcome to the Lenovo User Community!

If it started making a noise, and it no longer charges your phone, I would call it in for a warranty replacement.

[davehinder]

Thanks bananaman  

I'll do that... I have also discovered it isn't charging the laptop any longer, so that has helped push me that way...

[davehinder]

So Lenovo sent me a new slim AC Power Adaptor. 

This one also seems to have stopped working. 

What gives? Fortunately this one is within the Warranty period. But it's ridiculous. Are they just defective??

[canglan]

Hmm, I bought mine. It charges fine but it makes audible buzzing noise during charges, is this normal?

[Vince69]

Look like all the aussie slim adapter are cactus. I wanted to buy one as well but for the price i'm just not sure it's worth it.

I'm pretty sure the buzzing noise is not normal.

[JDay]

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Vince69 wrote:

Look like all the aussie slim adapter are cactus. I wanted to buy one as well but for the price i'm just not sure it's worth it.

I'm pretty sure the buzzing noise is not normal.

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The buzzing noise is caused by the use of non solid-state capacitors. I really do not know why everyone is not using solid state capacitors these days. Not only are they silent but they last much longer too.

[CustomerX]

Mine also makes a buzzing noise even when it is just plugged into the wall but not charging any devices. I was going to call in about it, but it sounds like this will happen with all Slims.