An important first step in troubleshooting which component in a laser printer is causing a jam is to:
Answer: A
Correct answer: note where in the paper path the paper stops
Where the paper stops identifies which mechanism failed - pickup, registration, fusing or exit. Beginning there narrows the search before any measurement is taken.
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An anti static strap uses a small _____ to make sure you do not become the least path of resistance to the ground?
Answer: D
Correct answer: resistor
The strap's resistor lets accumulated static bleed away slowly while limiting the current that could flow through the wearer if a live conductor were touched.
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Missing slot covers on a computer can cause?
Answer: A
Correct answer: over heat
The case is designed so that air drawn in by the fan passes over the components and out again. An open slot lets air take a short cut, so the flow past the cards falls and they run hot.
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When configuring a new network interface card for installation, which of the following would be a valid I/O address?
Answer: D
Correct answer: 360
378 is the parallel port, 2F8 and 3F8 are serial ports, so all three are already taken by standard devices. 360 is in the range left free for network cards.
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Which type of system board is the MOST likely candidate for processor upgrading if you want maximum performance and future compatibility?
Answer: B
Correct answer: PCI
Of the buses listed, PCI is the modern one, and a PCI board is the one likely to accept a faster processor and remain compatible with future parts. ISA and EISA are legacy buses.
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Which among the following hardware you usually can’t find inside a CPU Casing?
Answer: C
Correct answer: Video display unit
The power supply, the video card and the graphics processor are all inside the case. The display is the monitor, which stands outside it.
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After installing a sound card, the system locks up when a parallel port tape backup unit is also used. What is most likely the problem?
Answer: A
Correct answer: IRQ
A sound card and a parallel port device that both want the same interrupt will each work alone and lock the machine when used together. That signature - two devices fine separately, fatal together - is an IRQ conflict.
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In a computer with an eide adapter, where should you connect an ATA CD-ROM drive?
Answer: C
Correct answer: on the secondary IDE
Two devices on one IDE channel share it, and the channel runs at the speed of the slower. Putting the CD-ROM on the secondary channel leaves the hard disk alone on the primary, where it is not held back.
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Which port is most commonly used to connect a modern monitor carrying both video and audio?
Answer: D
Correct answer: HDMI
HDMI - High-Definition Multimedia Interface - carries uncompressed digital video and audio over a single cable and is the usual connection for monitors and televisions. DisplayPort is the other modern standard, and USB-C can carry a DisplayPort signal too. The other three are legacy interfaces, and knowing what each did is worth a little effort. The PS/2 port connected keyboards and mice, colour-coded purple and green, and was superseded by USB. The parallel port, with 25 pins, connected printers and sent eight bits at a time down separate wires. The serial port, with 9 pins, sent one bit at a time and connected modems and mice. Parallel transmission was faster at short distances but suffered from timing skew between the wires as speeds rose, which is why every modern high-speed interface - USB, SATA, PCI Express, HDMI - is serial. VGA is the older analogue video connector, still found but now rare.
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Suppose the maintenance package identifies several possible field replaceable units (FRUs) that will resolve the problem. What should you do after turning the power off?
Answer: A
Correct answer: Replace the indicated parts, one at a time in the recommended order
Changing one part at a time is what identifies which was faulty; replacing them all at once repairs the machine but teaches nothing and wastes good parts. The recommended order puts the most likely first.
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