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  2. Power-on self-test - Wikipedia

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

    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: Enhanced Graphics Adapter problem (EGA) 3 long beeps: 3270 keyboard card error

  3. User error - Wikipedia

    en.wikipedia.org/wiki/User_error

    Phrases used by the tech savvy to mean that a problem is caused entirely by the fault of the user include PEBKAC [8] (an acronym for "problem exists between keyboard and chair"), PEBCAK [9] (an alternative, but similar, acronym for "problem exists between chair and keyboard"), POBCAK (a US government/military acronym for "problem occurs between ...

  4. Blue screen of death - Wikipedia

    en.wikipedia.org/wiki/Blue_screen_of_death

    This behavior is also present in Windows 2.0 and Windows 2.1. Windows 3.0 uses a text-mode screen for displaying important system messages, usually from digital device drivers in 386 Enhanced Mode or other situations where a program could not run. Windows 3.1 changed the color of this screen from black

  5. BIOS - Wikipedia

    en.wikipedia.org/wiki/BIOS

    In computing, BIOS (/ ˈ b aɪ ɒ s,-oʊ s /, BY-oss, -⁠ohss; Basic Input/Output System, also known as the System BIOS, ROM BIOS, BIOS ROM or PC BIOS) is a type of firmware used to provide runtime services for operating systems and programs and to perform hardware initialization during the booting process (power-on startup). [1] The firmware ...

  6. Computer security - Wikipedia

    en.wikipedia.org/wiki/Computer_security

    An example of a physical security measure: a metal lock on the back of a personal computer to prevent hardware tampering. Computer security (also cybersecurity, digital security, or information technology (IT) security) is the protection of computer software, systems and networks from threats that can lead to unauthorized information disclosure, theft or damage to hardware, software, or data ...

  7. Intel Active Management Technology - Wikipedia

    en.wikipedia.org/wiki/Intel_Active_Management...

    A part of the Intel AMT web management interface, accessible even when the computer is sleeping. Intel Active Management Technology (AMT) is hardware and firmware for remote out-of-band management of select business computers, [1] [2] running on the Intel Management Engine, a microprocessor subsystem not exposed to the user, intended for monitoring, maintenance, updating, and repairing systems ...

  8. HDMI - Wikipedia

    en.wikipedia.org/wiki/HDMI

    [5]: §4.1.3 Type B; Dual-link This connector is 21.2 mm × 4.45 mm and has 29 pins, carrying six differential pairs instead of three, for use with very high-resolution displays such as WQUXGA (3840×2400). It is electrically compatible with dual-link DVI-D, but as of August 2021 has not yet been used in any products.

  9. I²C - Wikipedia

    en.wikipedia.org/wiki/I²C

    Typical voltages used are +5 V or +3.3 V, although systems with other voltages are permitted. The I 2 C reference design has a 7-bit address space , with a rarely used 10-bit extension. [ 4 ] Common I 2 C bus speeds are the 100 kbit/s standard mode and the 400 kbit/s fast mode .