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2. Dell Inspiron laptops - Wikipedia

   en.wikipedia.org/wiki/Dell_Inspiron_laptops

   Most Dell laptop computers have a special external power supply (PSU) which cannot be replaced by a third-party universal supply. The PSU has what's called UniqueWare™ Add-Only Memory, known under type DS2501. It is a parasitic power circuit memory chip connected to the center identification pin in the plug, via a 2m long unshielded wire ...

3. Power supply unit (computer) - Wikipedia

   en.wikipedia.org/wiki/Power_supply_unit_(computer)

   The desktop computer power supply converts the alternating current (AC) from a wall socket of mains electricity to a low-voltage direct current (DC) to operate the motherboard, processor and peripheral devices. Several direct-current voltages are required, and they must be regulated with some accuracy to provide stable operation of the computer.

4. Dell XPS - Wikipedia

   en.wikipedia.org/wiki/Dell_XPS

   Inspiron XPS – The very first XPS laptop was a very heavy desktop-replacement laptop starting at 9.06 pounds without a power supply (which added 2.5 pounds). This was because it was offered with either a 3.4 GHz desktop Pentium 4 HT "Prescott" processor, or the "Gallatin" Pentium 4 Extreme Edition processor at the same clock speed, which gave ...

5. Power-on self-test - Wikipedia

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

   A power-on self-test (POST) is a process performed by firmware or software routines immediately after a computer or other digital electronic device is powered on. [ 1 ] POST processes may set the initial state of the device from firmware and detect if any hardware components are non-functional.

6. Machine-check exception - Wikipedia

   en.wikipedia.org/wiki/Machine-check_exception

   Inadequate or failing power supply. Cooling problems are usually obvious upon inspection. A failing motherboard or processor can be identified by swapping them with functioning parts. Memory can be checked by booting to a diagnostic tool, like memtest86. Non-essential failing I/O devices and controllers can be identified by unplugging them if ...

7. Uninterruptible power supply - Wikipedia

   en.wikipedia.org/wiki/Uninterruptible_power_supply

   A large data-center-scale UPS being installed by electricians. An uninterruptible power supply (UPS) or uninterruptible power source is a type of continual power system that provides automated backup electric power to a load when the input power source or mains power fails.

8. Coaxial power connector - Wikipedia

   en.wikipedia.org/wiki/Coaxial_power_connector

   A coaxial power connector is an electrical power connector used for attaching extra-low voltage devices such as consumer electronics to external electricity. Also known as barrel connectors , concentric barrel connectors or tip connectors , these small cylindrical connectors come in an enormous variety of sizes.

9. Power cycling - Wikipedia

   en.wikipedia.org/wiki/Power_cycling

   Power cycling is the act of turning a piece of equipment, usually a computer, off and then on again. Reasons for power cycling include having an electronic device reinitialize its set of configuration parameters or recover from an unresponsive state of its mission critical functionality, such as in a crash or hang situation.