static sound coming from laptop speakers

Download an install the latest BIOS from Lenovo's site ( BHCN32WW) Here are the steps I did to fix issue on my cusins Y540:ġ. The fix Lenovo implemented was simply to make those voltage transitions slower and therfore reduce/remove the crackling sound. The problem mainly seems to be, that the CPU voltages ramp up and down very fast for power saving, leading to a crackling noise at every transition. That also explains, why the sound is fine when gaming, as the CPU is always running at full load. I did some investigation and those sneaky lenovo engineers already created a fix, but hid it very good. I ordered a Y540 for my cousin and he was really disappointed, because of the audio issue.

If this indeed is the issue, is there a way to distribute more (enough) energy to the sound card, without putting the laptop in a high performance mode? How is this achieved, via BIOS settings of via power management software?ĭoes anybody have the same issue with this model? Does anybody have a solution? But I do not want to have my laptop in constant high performance mode: then the fans produce a lot of noise.

It would explain why the issue does not occur when playing video games. In a different thread on this forum I read that in battery saving mode, some laptops would distribute too little energy to the sounds card, which in turn led to crackling sounds. Things I tried so far: updating sound card drivers, removing drivers, replacing drivers, disable audio effects, increasing minimal CPU performance from 5 to 100%, restore laptop to original settings, updating windows to the newest version, use the laptop in battery mode, using a high performance power schedule (via de windows power management, not the lenovo power management). Because the audio CAN work fine, just not in every situation. That would take a lot of time and i’m convinced there must be a simpler solution, I think its’s not a hardware issues, but a software issue. Lenovo helpdesk had one advice: update the sound card drivers (Realtek), otherwise, send it back en replace the unit. But is does happen when only playing Spotify or Youtube. Strangely it doesn’t seem to happen when the laptop is in full performance when playing a game, then the audio is just fine. It happens when listening via the speakers but also when using head phones. Sounds like a sort of static and is really annoying. It works like a charm expect for one problem: the audio often produces a crackling sound. This week I received my brand new Lenovo Legion Y540.

Static sound coming from laptop speakers