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Safety & Electricity

Intro to Computer Systems. Safety & Electricity. # 1 ELECTRICITY A Computer that is plugged in and turned on will not electrocute you when touching any of the boards or chips inside the case BUT . . . There are 3 components that do hold a charge big enough to hurt you.

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Safety & Electricity

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  1. Intro to Computer Systems Safety & Electricity

  2. # 1 ELECTRICITY A Computer that is plugged in and turned on will not electrocute you when touching any of the boards or chips inside the case BUT . . . There are 3 components that do hold a charge big enough to hurt you How a PC can hurt you

  3. Power Supply Laser Printer CRT Monitor 3 PC components with a charge

  4. Always disconnect the computer power plug and have the PC turned off BEFORE you work inside the computer • NEVER open up the power supply casing, or any power supply of any device • Do not open up any monitor at any time, even if not plugged in • Do not open up any laser printer. Safety Rules – Part 1

  5. # 2 FIRE • While working, you may notice sparks, smoke or a loud pop. What do you do? • if there are flames, alert the teacher and she will use the Class C fire extinguisher to put out the fire. DO NOT TRY ANY OTHER METHOD OF PUTTING OUT THE FIRE. • if you can, pull out the plug from the computer How a pc can hurt you • DO NOT • PLUG IT BACK IN TO SEE • IF THE PROBLEM STILL EXISTS.

  6. # 3 B00-B00s The inside of the computer case and some components may have very sharp edges.Handle carefully to keep the skin on your fingers. ALWAYS cover any cuts if there is blood to avoid spreading disease. Components can weigh as much as 40 – 50 pound Lift smart to avoid back strain. How a pc can hurt you

  7. # 1 ESD = Electrostatic Discharge Static Electricity happens when two objects that store different amounts of a charge come in contact. Humans always have some charge in their bodies and you wouldn’t even know if you shocked your PC But circuit boards are VERY sensitive to ESD and it can KILL your computer in just a split second! How you can KILL your pc

  8. Ground yourself – you need to send the ESD in your body into someplace else before you touch the inside of your computer. Controlling ESD Method #1 Touch something metal The inside of the PC case or the power supply casing are good choices Method #2 Use an anti-static bracelet and /or a static mat

  9. # 2 BAD ELECTRICITY • PCs like good clean electric power. • A surge (burst of power) can fry the PC parts • A sag (a drop in power or blackout) can make the PC reboot or shut down • To protect against bad electricity • Surge protector – looks like a power strip, but better! • UPS – Uninterruptible Power Supply – it’s a big battery that will keep your computer running even in a power outage. How you can KILL your pc

  10. # 3 Heat • Computers and other electronics HATE heat. Your PC will shut down if it gets too hot [dead man switch]– if it can’t shut down, it will burn out. • Solutions: • make sure all the fans are working • clean out the dust regularly • use a laptop cooler • DON’T put it on a couch or bed How you can KILL your pc

  11. Magnets Most hard drives use magnetism to store data. If your PC comes into contact with another magnet, it may ERASE all your data! CRT monitors are very sensitive to magnets - it can permanently warp the image on your monitor screen. How you can kill your pc

  12. Safety quiz - - - - open notes

  13. Start | My Computer On top bar Map Network Drive Leave drive letter (Z, Y . . . it doesn’t matter) \\rbrhs-003\classroomworkfolders\231\GalanteClick Finish – folder should open up Mapping a drive to the class folder

  14. Look on Desktop for the enITEPC_VA_Desktop 4.0 folder If you don’t see it there, go to Start | My Computer |click on C: drive Doubleclick on Index.html to start the activity To get Virtual Desktop Software

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