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What's DOS?
Posts: 2
Registered: ‎07-23-2011
Location: Canada
Message 1 of 4 (1,054 Views)

Edge E420 Whining Noise

Hello,

 

Just received my e420. When I have the laptop running on battery, there is a terrible whining/piercing noise coming from the bottom left corner.

 

It is really annoying and hard to focus. When I have the laptop plugged in, there is no whining/piercing noise.

 

I was doing some research and lenovo had some issues with the i5 processor. My laptop contains that i5 processor.

 

Any help?

Guru
Posts: 9,479
Registered: ‎12-26-2009
Location: CA
Message 2 of 4 (1,048 Views)

Re: Edge E420 Whining Noise

The newer Sandy Bridge chips are supposed to be less prone to this issue.

Try this out of the Knowledge Base and see if it helps:
http://forums.lenovo.com/t5/T400-T500-and-newer-T-series/T510-T410-W510-ThinkPad-high-pitched-whine/...

W520: 2960XM, Q2000M @ 1091/1380, 32GB RAM, 500GB&750GB HDD & 500GB SSD, FHD&MB168B+
X61T: L7500, 4GB RAM, 500GB HDD, XGA screen, Ultrabase
W550s: 5600U, K620M at 1164/1281, 16GB RAM, 512GB SSD, 3K touchscreen
X200s: SL9400, 6GB RAM, 64GB SD card, WXGA+ screen
TPT1: 1839-23U
What's DOS?
Posts: 2
Registered: ‎07-23-2011
Location: Canada
Message 3 of 4 (1,046 Views)

Re: Edge E420 Whining Noise

thanks for that link.

 

I was going to try it. But I read somewhere that when you disable that CPU thingy, your battery life is drained big time.

 

I will be calling Lenovo to follow up

Ctrl-Alt-Del
Posts: 7
Registered: ‎07-28-2011
Location: Indonesia
Message 4 of 4 (975 Views)

Re: Edge E420 Whining Noise

Hello Chunks,

 

I'm in the same situation as you're. I also have an E420 with i5-2410m.

The noise is also coming from the bottom left corner.

As the KB pointed by Colonel O'Neil said, by disabling the CPU Power Management, the noise is gone.

 

Have you contacted Lenovo? How do they respond ?

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