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A customer complains that his old tower PC doesn't always tum on and randomly shuts off for hours. The HDD and RAM memory tests both come back with positive results What hardware part would you check next? NIC EXT-USB HDD PS/2 PSU SSD

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Step 1/2

Given:

A customer complains that his old tower PC doesn't always turn on and randomly shuts off for hours. The HDD and RAM memory tests both come back with positive results.

The PSU (power supply unit) is the responsible component that converts electrical power from an outlet into the form that the computer's components can use.

Explanation:

When PSU is faulty it can lead to various issues, including the computer not turning on reliably or shutting off unexpectedly.

When the power supply is faulty it may not be providing a stable power supply to the components which can result in computer failing to turn on, or it may shut off unexpectedly.

Other options:

`1.` NIC: The Network Interface card is responsible for network connectivity. The issue with this will affect network connectivity and it does not have any effect on the computer to not turn on or to shut off randomly.

`2.` EXT. USB HDD (External USB Hard Drive): It is the external USB hard drive which is used for storage of data and it will not have a direct impact on the computer's power or ability to turn on.

Step 2/2

`3.` PS/2 (Peripheral Slot 2): It is a connector used for peripherals like keyboards and mice. This is not responsible for power-related problems in computers.

`5.` SSD (Solid State Drive): It is a storage device. An issue with SSD can affect the data access but not power-related problems in computers.

So, the PSU is the next hardware part to be checked next.

Final Answer

PSU is the next hardware part to be checked next.

`d.` PSU is the correct option.

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