1. COMPUTER HARDWARE SERVICING
(SPECIALIZATION)

2. FILL UP THE DIAGRAM BELOW WITH THE THINGS YOU THINK WILL BE HARMFUL WHEN DOING A HARDWARE REPAIR.

3. CHEMICAL HAZARDS
BROMINE, LEAD, MERCURY, CADMIUM AND CHROMIUM

4. THE TOP TEN HAZARDS FOR PCS IN INDUSTRY ARE:
10. User errors - From not powering down properly to skipping scan disks.
9. Faulty manufacture - years ago there were only a handful of companies producing PCs now it seems there are an almost infinite number of manufacturers and assemblers

5. 8. Bad upgrades. It is not just computers themselves that are victims of bad workmanship, upgrades by inexperienced computer fitters can cause horrendous problems.
7. USB Device Mishaps. It seems everything can be plugged into a USB these days. However, it maybe that your USB device is not suited to the operating system.
6. Power surge/cut. Power surges or unexpected power cuts can not only cause instant loss of data but can also fry a processor rendering it useless.

6. 5. Dirt/Dust. A dusty environment will clog a computer and block cooling vents causing a computer to overheat.
4. Water/fluids. Of course computers are electrical and with all electrical equipment, computers and water do not mix.
3. Heat. Processors can run exceptionally hot and if a computers cooling system is inadequate, it will only be a matter of time before it packs up for good.

7. 2. Cold. Just as with heat, computers don't enjoy the cold too much either. Processors will not operate at all if the operating temperature is too cold as condensation inside the machine can freeze and expand damaging the processor and electronics.
1. Knocks/bangs. Computers are sensitive machines, simply moving a PC to another room can cause disrupting the delicate circuitry and hard drives. Dropping a computer or severe knocks and bangs will permanently damage the circuits and processors or dislodge wiring.

8. CAUTIONS
Don't work alone - in the event of an emergency another person's presence may be essential.
Always keep one hand in your pocket when anywhere around a powered line-connected or high voltage system.
Wear rubber bottom shoes or sneakers.

9. Don't wear any jewelry or other materials that could accidentally contact circuitry and conduct current, or get caught in moving parts. (Bracelets, long necklaces)
Don't attempt repair work when you are tired. Not only will you be more careless, but your primary diagnostic tool - deductive reasoning - will not be operating at full capacity.
Finally, never assume anything without checking it out for yourself! Don't take shortcuts!