220-801 Question #1113: Real Exam Question with Answer & Explanation

The correct answer is B: POST card. A POST (Power On Self Test) card is a diagnostic expansion card inserted into a PCI or PCIe slot that displays hexadecimal error codes during the boot process. Since the workstation has power but produces no video output and no beep codes, the BIOS/UEFI may be halting at an early

Question

A brownout has occurred within a building. A technician is repairing a workstation which has a power light, but is not displaying anything on the screen and is not making any sounds during boot up. Which of the following should be used to further troubleshoot the workstation?

Options

ALoop back plug
BPOST card
CPower supply tester
DMultimeter

Explanation

A POST (Power On Self Test) card is a diagnostic expansion card inserted into a PCI or PCIe slot that displays hexadecimal error codes during the boot process. Since the workstation has power but produces no video output and no beep codes, the BIOS/UEFI may be halting at an early POST stage before the display or speaker can be activated - a common result of component damage from a brownout (voltage drop). The POST card reads the diagnostic port codes directly from the motherboard, identifying exactly where the boot process is failing. A loopback plug tests network or serial ports. A power supply tester checks PSU voltages, but the power light confirms some power is present. A multimeter measures voltage/current but is not efficient for diagnosing which hardware component failed during POST.

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