A technician is troubleshooting a PC that is not completing POST and merely provides an audible beep code. Which of the following should be the FIRST item checked?
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During a POST the computer would have checked to ensure that all equipment required to boot is properly working. Of the 4 choices, the only part required for BOOT is a proper memory configuration. Heat sinks, hard drives, and IDE/SATA Cables are not needed to pass POST, which makes them irrelevant to the question.
Wikipedia
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.This article mainly deals with POSTs on personal computers, but many other embedded systems such as those in major appliances, avionics, communications, or medical equipment also have self-test routines which are automatically invoked at power-on.The results of the POST may be displayed on a panel that is part of the device, output to an external device, or stored for future retrieval by a diagnostic tool. Since a self-test might detect that the system's usual human-readable display is non-functional, an indicator lamp or a speaker may be provided to show error codes as a sequence of flashes or beeps. In addition to running tests, the POST process may also set the initial state of the device from firmware.
In the case of a computer, the POST routines are part of a device's pre-boot sequence; if they complete successfully, the bootstrap loader code is invoked to load an operating system.
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