2015-04-28, 17:17 PM

Hi veno77,

yes, I did and my motherboard was replaced. It was useless, the problem still persists. Service man told me exactly it is normal behavior and escalation to higher level of service cant solve this problem. It is design flaw, but without impact on service life, so lenovo refuses to solve this problem.

USB selective suspend is the less-affecting method to solve whine I think. But everything is about CPU power consumtion. But I dont believe it can help.

Here is my previous post from my own thread:

Hello, I have a problem with my 3 months old Thinkpad T440p. There is buzzing/beeping coil whine issue. If you work at night, that sound makes you really CRAZY. The problem is described on the internet pretty well and i spent dozens of hours by trying to find a sollution. It isnt only Lenovo problem, users of Dell XPS series have it too in a high number of cases.

Problem appears when:

processor is in higher C-State

all applications are minimized and you see only desktop background

internet browser is opened

Possible sollution is disabling CPU DeeperSleep in Lenovo PowerManager or disabling Intel SpeedStep in BIOS, but it is not the sollution we want. Laptop get really hot then, especially in left half of keyboard, and battery life is decreased. This is useless and I wonder how Lenovo can recommend this solution as a fix. I tis workaround, not fix. You only trade something for something else.

A lot of people on internet forums says there is problem in power adapter. Yes, there can be a problem too, but adapter can whine separately, just try if whine persists in battery mode. Another useless sollution.

Next try, configuring USB/Bluetooth/PCI-E sleep modes or power settings: not T440p case. The same with playing sound loop, changing memory modules, disks, etc.. Useless sollutions.

We all know, where is the problem: coil core vibration or power circuit piezoelectric effect. In most cases, using more expensive, higher quality noise free coils and other parts can reduce this issue to minimum. With better board design it can solve this problem forever. Why Lenovo is refusing to solve this?

I am very surprised that Dell, after a lot of XPS13 and XPS15 users claimed, announced hardware fix for all affected systems by replacing motherboard with new, noise-free revision!! Why Lenovo cant make the same for ThinkPad users? I always thought Lenovo ThinkPad is something „better“ for professional use, or not? Maybe Mark_Lenovo can tell us more!

There is no need to say how much Im disappointed, frustrated and sad with this laptop. I really like Lenovo, I used ThinkPads for years, and I see the product quality is getting down. I am no one with a broken heart, so we will be happy Lenovo can hear our claims.