Computer Repair & Computer Repair & MaintenanceMaintenance

Tel: 0161 953 5995 Ex Tel: 0161 953 5995 Ex 33743374

Ainsley_smith@mancat.ac.Ainsley_smith@mancat.ac.ukuk

Ainsley SmithAinsley Smith

Dismantle & Assemble a PCDismantle & Assemble a PCToday you will :-Today you will :-

Prepare a log of available hardwarePrepare a log of available hardware Prepare a risk assessmentPrepare a risk assessment Draw a diagram of how ports & cables Draw a diagram of how ports & cables

are connectedare connected Assemble a pc from a range of available Assemble a pc from a range of available

partsparts Learn how to store and pack ICT Learn how to store and pack ICT

equipmentequipment Perform safety checksPerform safety checks Test for PC functionalityTest for PC functionality

Dismantle & Assemble a PCDismantle & Assemble a PC Risk Assessment & Safety factorsRisk Assessment & Safety factors

Main Hazards ?Main Hazards ? ElectricalElectrical

Electrical shock or Burns - Students are not Electrical shock or Burns - Students are not permitted to work alone in laboratories permitted to work alone in laboratories

Someone electrocuted and still attached to a supply Someone electrocuted and still attached to a supply is still `live'. is still `live'.

Current over 10mA passing through the body is Current over 10mA passing through the body is painful; current in excess of 100mA passing through painful; current in excess of 100mA passing through the body is lethal. the body is lethal.

Death has been caused by as little as 40 Volts Death has been caused by as little as 40 Volts Never dismantle the actual PSU in your PC. This unit Never dismantle the actual PSU in your PC. This unit

contains potentially lethal mains voltages, even when contains potentially lethal mains voltages, even when it is disconnected from the supply. They are not user-it is disconnected from the supply. They are not user-repairable. If it fails, replace it with a new one.repairable. If it fails, replace it with a new one.

In practical terms the following points should be In practical terms the following points should be noted: -noted: -

Do not attempt to modify or service electrical Do not attempt to modify or service electrical equipment unless it is disconnected from the equipment unless it is disconnected from the supply supply

Fuses of the correct rating must be fitted to all Fuses of the correct rating must be fitted to all electrical equipment electrical equipment

Electrical switches have a live side even in the Electrical switches have a live side even in the switched off positionswitched off position

The outer cover of any mains cable must always The outer cover of any mains cable must always be securely held by the cable grips on the plugbe securely held by the cable grips on the plug..

Dismantle & Assemble a PCDismantle & Assemble a PC Risk Assessment & Safety Risk Assessment & Safety

factorsfactors

Dismantle & Assemble a PCDismantle & Assemble a PC Risk Assessment & Safety factorsRisk Assessment & Safety factors

Main Hazards ?Main Hazards ? ElectricalElectrical ESD –ESD –

Wear an anti-static wristband Wear an anti-static wristband If the PC is grounded, touching its frame will ground If the PC is grounded, touching its frame will ground

youyou The average person can carry up to 25,000 volts of The average person can carry up to 25,000 volts of

static charge at any given time static charge at any given time CPUs and memory chips of any kind are highly CPUs and memory chips of any kind are highly

vulnerable to ESD vulnerable to ESD you may soon start to notice random memory errors, you may soon start to notice random memory errors,

blue screens blue screens Try not to open up computers on thick carpetsTry not to open up computers on thick carpets

Electrostatic Electrostatic DischargeDischarge

Dismantle & Assemble a PCDismantle & Assemble a PC Risk Assessment & Safety factorsRisk Assessment & Safety factors

Main Hazards ?Main Hazards ? ElectricalElectrical ESD – ESD – Electrostatic DischargeElectrostatic Discharge Sharp EdgesSharp Edges

Beware of Beware of sharp edgessharp edges inside PC Cases and inside PC Cases and the small solder pins on boards. A harmless-the small solder pins on boards. A harmless-looking case edge can be as sharp as a razor, looking case edge can be as sharp as a razor, and remove large chunks of flesh if and remove large chunks of flesh if accidentally nudged with a slipping hand.accidentally nudged with a slipping hand.

Dismantle & Assemble a PCDismantle & Assemble a PC Risk Assessment & Safety factorsRisk Assessment & Safety factors

Main Hazards ?Main Hazards ? ElectricalElectrical ESD – ESD – Electrostatic DischargeElectrostatic Discharge Sharp EdgesSharp Edges Manual HandlingManual Handling

PC devices/peripherals are generally PC devices/peripherals are generally veryvery delicate in nature. Handle them with delicate in nature. Handle them with extreme extreme carecare and and alwaysalways employ some method to employ some method to disperse static electricity. disperse static electricity.

Dismantle & Assemble a PCDismantle & Assemble a PC Risk Assessment & Safety factorsRisk Assessment & Safety factors

Manual HandlingManual Handling PC devices/peripherals are generally very PC devices/peripherals are generally very

delicate in nature. Handle them with extreme delicate in nature. Handle them with extreme care and always employ some method to care and always employ some method to disperse static electricity. disperse static electricity.

Can I lift it? Can I lift it?  - Is it stable?  - Is it stable?  - Are there any sharp edges?  - Are there any sharp edges?

Have I any injuries that could Have I any injuries that could impedeimpede my my lifting? lifting?

Is the floor untidy or too slippery?Is the floor untidy or too slippery?

ToolkitToolkit

Common Installation Common Installation ProblemsProblems

Damaged PartsDamaged Parts Wrong PartsWrong Parts Software IssuesSoftware Issues Interface cards Not SeatedInterface cards Not Seated Loose Connectors Loose Connectors Parts not connected correctly.Parts not connected correctly.

Handling of ComponentsHandling of Components Hard diskHard disk

Do not drop or BangDo not drop or Bang Do not expose to water / liquidDo not expose to water / liquid Do not take apartDo not take apart

Expansion cardsExpansion cards Try not to touch the copper trackTry not to touch the copper track Try not to touch the componentsTry not to touch the components

RamRam Take ESD measuresTake ESD measures Do nor force into slotsDo nor force into slots Do not bend the modulesDo not bend the modules

Computer Repair & Computer Repair & MaintenanceMaintenance