Computer Repair

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Computer Repair Maintenance
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Ainsley Smith

• Tel [phone] Ex 3374
• Ainsley_smith_at_mancat.ac.uk

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Dismantle Assemble a PCToday you will -

• Prepare a log of available hardware
• Prepare a risk assessment
• Draw a diagram of how ports cables are
  connected
• Assemble a pc from a range of available parts
• Learn how to store and pack ICT equipment
• Perform safety checks
• Test for PC functionality

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Dismantle Assemble a PC Risk Assessment
Safety factors

• Main Hazards ?
• Electrical
• Electrical shock or Burns - Students are not
  permitted to work alone in laboratories
• Someone electrocuted and still attached to a
  supply is still live'.
• Current over 10mA passing through the body is
  painful current in excess of 100mA passing
  through the body is lethal.
• Death has been caused by as little as 40 Volts
• Never dismantle the actual PSU in your PC. This
  unit contains potentially lethal mains voltages,
  even when it is disconnected from the supply.
  They are not user-repairable. If it fails,
  replace it with a new one.

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Dismantle Assemble a PC Risk Assessment
Safety factors

• In practical terms the following points should be
  noted -
• Do not attempt to modify or service electrical
  equipment unless it is disconnected from the
  supply
• Fuses of the correct rating must be fitted to all
  electrical equipment
• Electrical switches have a live side even in the
  switched off position
• The outer cover of any mains cable must always be
  securely held by the cable grips on the plug.

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Dismantle Assemble a PC Risk Assessment
Safety factors

• Main Hazards ?
• Electrical
• ESD
• Wear an anti-static wristband
• If the PC is grounded, touching its frame will
  ground you
• The average person can carry up to 25,000 volts
  of static charge at any given time
• CPUs and memory chips of any kind are highly
  vulnerable to ESD
• you may soon start to notice random memory
  errors, blue screens
• Try not to open up computers on thick carpets

Electrostatic Discharge
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Dismantle Assemble a PC Risk Assessment
Safety factors

• Main Hazards ?
• Electrical
• ESD Electrostatic Discharge
• Sharp Edges
• Beware of sharp edges inside PC Cases and the
  small solder pins on boards. A harmless-looking
  case edge can be as sharp as a razor, and remove
  large chunks of flesh if accidentally nudged with
  a slipping hand.

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Dismantle Assemble a PC Risk Assessment
Safety factors

• Main Hazards ?
• Electrical
• ESD Electrostatic Discharge
• Sharp Edges
• Manual Handling
• PC devices/peripherals are generally very
  delicate in nature. Handle them with extreme care
  and always employ some method to disperse static
  electricity.

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Dismantle Assemble a PC Risk Assessment
Safety factors

• Manual Handling
• PC devices/peripherals are generally very
  delicate in nature. Handle them with extreme care
  and always employ some method to disperse static
  electricity.
• Can I lift it?  - Is it stable?  - Are there
  any sharp edges?
• Have I any injuries that could impede my lifting?
  
• Is the floor untidy or too slippery?

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Toolkit
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Common Installation Problems

• Damaged Parts
• Wrong Parts
• Software Issues
• Interface cards Not Seated
• Loose Connectors
• Parts not connected correctly.

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Handling of Components

• Hard disk
• Do not drop or Bang
• Do not expose to water / liquid
• Do not take apart
• Expansion cards
• Try not to touch the copper track
• Try not to touch the components
• Ram
• Take ESD measures
• Do nor force into slots
• Do not bend the modules

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Computer Repair Maintenance