Dell P2411HB Buzzing noise at 80 percent or less brightness setting

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  • stvhop
    HP1955L Buzzing noise & interference
    by stvhop
    Hello, This is my first post so please forgive me if I miss out some vital info.
    I have a problem with my HP1955L monitor from 2005.
    The first thing to say is that it is still basically working, ie the picture is fine.
    However it makes an electrical buzzing sound. I know all monitors make some some of hum, but this is louder and more of a buzz.
    The volume of the noise seems to be dependent on how hard the monitor is working; switched on with a blank screen -> no sound; small dialog (like OSD only) -> minor buzzing; full screen picture -> loud buzzing.
    ...
    11-07-2020, 07:13 AM
  • Orion Bardier Skylar
    Adding Bluetooth module to Woofer buzzing noise
    by Orion Bardier Skylar
    Hi, I got this Woofer,Name TBT, which damaged its Radio module, then was added a Bluetooth module from the market(history from client). Then recently was brought to me with very low sound and heating problem. I changed subwoofer Speaker which had impedance of 1.2 instead of 4ohms rms and the bass ic KA2206B. Sound is back but buzzing and hissing sound present even when muted. How can I get rid of it?
    03-06-2024, 02:35 PM
  • tony359
    Removing electrical noise introduced by fan
    by tony359
    Hi all,

    I am working on a sound processor, it tends to overheat so I fitted a fan inside. The fan is connected to the +15V of the PSU via a DC-DC converter based on the LM2596 to reduce the voltage to around 10.5V.

    Unfortunately the analogue circuitry is picking up the noise from the fan in two ways:
    1. The fan is close to the analogue section, the motor itself gets into the outputs so I'll have to move it somewhere else
    2. Even with the fan running outside of the case, there is still some noise which is clearly going back to the processor via power line....
    2 Photos
    11-28-2023, 05:18 AM
  • MegaZAC
    Onkyo TX-SR805 noise in one channel
    by MegaZAC
    Surprisingly enough, this receiver doesn't have the DSP chip issue. The HDMI board does not get hot, and sound over HDMI works fine.

    Regardless of the input, the right channel has noise that is clearly noticeable even on average volume level. The only cases when there's no noise is when VCR input is selected (some tracks on the board are damaged, maybe that's why), or if HDMI input is selected but nothing plugged into it. In all other cases, even when no input is connected I still have the noise.

    There's some logic behind it. As soon as I select an input I get only left...
    04-23-2025, 10:09 PM
  • courtcircuit
    Philips HTS8000 home cinema noise problem
    by courtcircuit
    Hello

    I have since a long time a Philips HTS8010S/01 which has been old but was doing the job.

    Since a few days, it starts by making a weird "static" nois when switches on for a few seconds to a minute and then works like a charm.
    Noise loudly outputs from the 3 channels, even if no signal is sent by the controler.DVD to the subwoofer/amp unit.

    I was thinking of a soldering that was starting to be damaged and that was only doing the job after a few seconds of heating, most probbaly on the power board
    Removed each of tyhe boards
    ...
    02-08-2025, 08:22 AM
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