Power Adapter make noise

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Dr_Flash · #1 Post by **Dr_Flash** » Sun Mar 26, 2006 10:04 am

Hello,

i have a T60 (2007/63g) and now i hear a noise like peeeeeep. The poweradapter is the source of it. I think thats normal or? What can/should i do?

THX

Sven

Mandrake · #2 Post by **Mandrake** » Sun Mar 26, 2006 10:20 am

Mine is doing that also. VERY annoying. I'm calling lenovo tomorrow.

JHEM · #3 Post by **JHEM** » Sun Mar 26, 2006 10:35 am

Something to try, and don't laugh!

Unplug the power brink from AC, turn the plug 180 degrees and plug in again, i.e. reverse the polarity.

Sometimes works with 60Hz/50Hz buzzing from non-grounded devices.

Regards,

James

Dr_Flash · #4 Post by **Dr_Flash** » Sun Mar 26, 2006 10:42 am

dont work *g* but thx

sugo · #5 Post by **sugo** » Sun Mar 26, 2006 12:17 pm

Older T4x power adapters had this noise issue as well. It was fixed in new adapters with different FRUs.

Mandrake · #6 Post by **Mandrake** » Sun Mar 26, 2006 12:37 pm

Since it does not have ground they all may have similar problems just some worse than others. Might have to find a universal adapter with ground.

#7 Post by **K. Eng** » Sun Mar 26, 2006 2:56 pm

I've had no less than five power bricks with this T40. Four of them (including the current one) had very irritating noise problems.

This is not just an IBM/Lenovo problem. My experience with Dell and HP machines has been similar. This is probably an unfortunate result of cost cutting on the part of AC adapter suppliers.

sugo wrote:Older T4x power adapters had this noise issue as well. It was fixed in new adapters with different FRUs.

bg4533 · #8 Post by **bg4533** » Sun Mar 26, 2006 3:23 pm

I have 2 of the 90W adaptors for the T60 (one came with my Advanced Mini Dock). Both are silent.

christopher_wolf · #9 Post by **christopher_wolf** » Sun Mar 26, 2006 3:39 pm

K. Eng wrote:I've had no less than five power bricks with this T40. Four of them (including the current one) had very irritating noise problems.

This is not just an IBM/Lenovo problem. My experience with Dell and HP machines has been similar. This is probably an unfortunate result of cost cutting on the part of AC adapter suppliers.

sugo wrote:Older T4x power adapters had this noise issue as well. It was fixed in new adapters with different FRUs.

All of the adapters I have seen thus far seem to be variation amongst the bricks and how they are made. My T43 brick has a tiny buzzing noise that I cannot even hear unless I put my ear against it; same goes for the one on my 701c Butterfly Thinkpad. Little high-pitched, high-frequency noise. Comes on most, if not all, laptop power bricks and is normal to some extent...but not to the point where you start hearing it a few feet away.

kwramm · #10 Post by **kwramm** » Mon Mar 27, 2006 2:54 am

I assume you are all from north america and this is a 110v/60 Hz problem? Or does anyone else have this problem too? sounds pretty annoying

pekka · #11 Post by **pekka** » Mon Mar 27, 2006 3:51 am

kwramm wrote:I assume you are all from north america and this is a 110v/60 Hz problem? Or does anyone else have this problem too? sounds pretty annoying

I had the same problem with T42 and I live in your neighbour (Finland) and we have same 230 V electric system. T60 is coming and I hope it's power adapter is silent...

Power Adapter make noise

Power Adapter make noise

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