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  2. Power-on self-test - Wikipedia

    en.wikipedia.org/wiki/Power-on_self-test

    No beep: Power supply, system board problem, disconnected CPU, or disconnected speaker Continuous beep: Power supply, system board, RAM or keyboard problem Repeating short beeps: Power supply, system board or keyboard problem 1 long, 1 short beep: System board problem 1 long, 2 short beeps: Display adapter problem (MDA, CGA) 1 long, 3 short beeps

  3. Buzzer - Wikipedia

    en.wikipedia.org/wiki/Buzzer

    Sounds commonly used to indicate that a button has been pressed are a click, a ring or a beep. Interior of a readymade loudspeaker, showing a piezoelectric-disk-beeper (With 3 electrodes ... including 1 feedback-electrode ( the central, small electrode joined with red wire in this photo), and an oscillator to self-drive the buzzer.

  4. Quindar tones - Wikipedia

    en.wikipedia.org/wiki/Quindar_tones

    The Quindar system, named after its manufacturer, Quindar Electronics, Inc., used two tones, both being pure sine waves that were 250ms long. The "intro tone" was generated at 2,525 Hz and signaled the "key down" key-press of the PTT button and unmuted the audio.

  5. PC speaker - Wikipedia

    en.wikipedia.org/wiki/PC_speaker

    Programming the PC Speaker, by Mark Feldman for PC-GPE. Programming the PC Speaker, by Phil Inch: part 1, part 2 (includes a very detailed explanation of how to play back PCM audio on the PC speaker, and why it works) Bleeper Music Maker A freeware to use the PC speaker to make music (superseded by BaWaMI) Beep for Linux and Windows, by Frank ...

  6. Download and install System Mechanic - AOL Help

    help.aol.com/articles/how-do-i-download-and...

    Click Download now | wait for the installation file to download. Click the file to open. System Mechanic will begind to download. When the download finished the install wizard will show up. Click Yes. Click Install. After the installation you will be asked for your email address for activation. Enter the email address used for purchasing System ...

  7. Reset (computing) - Wikipedia

    en.wikipedia.org/wiki/Reset_(computing)

    Generally, a hard reset is initiated by pressing a dedicated reset button On some systems (e.g, the PlayStation 2 video game console), pressing and releasing the power button initiates a hard reset, and holding the button turns the system off.

  8. Media control symbols - Wikipedia

    en.wikipedia.org/wiki/Media_control_symbols

    In 2012, Google rebranded its digital download store to Google Play, [8] using the Play symbol in its logo. The Play symbol also serves as a logo for YouTube since 2017. [ 9 ] Television station owners Morgan Murphy Media and TEGNA have begun to institute the Play symbol into the logos of their stations to further connect their websites to ...

  9. Key rollover - Wikipedia

    en.wikipedia.org/wiki/Key_rollover

    Key rollover is the ability of a computer keyboard to correctly handle several simultaneous keystrokes. A keyboard with n-key rollover (NKRO) can correctly detect input from each key on the keyboard at the same time, regardless of how many other keys are also being pressed. Keyboards that lack full rollover will register an incorrect keystroke ...