Toshiba A20-S259 - Satellite - Pentium 4 2.66 GHz, Maintenance Manual

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4 Replacement Procedures 4.1 General
4-2 Satellite A20 Maintenance Manual (960-444)
Safety Precautions
Before you begin disassembly, read the following safety precautions and observe them carefully as
you work.
DANGER: 1. Always use the genuine battery that is authorized by Toshiba or
compatible with the unit. Since other battery packs have different
specifications, they may be incompatible with the unit, and may burst or
explode.
Never heat or disassemble the battery pack, as that could cause leakage
of alkaline solution. Never throw the battery pack into a fire, as that
could cause the battery pack to explode.
2. The power supply, FL inverter and other components carry high
voltages. If you need to turn on the power of a partially disassembled
computer to check its operation, be very careful not to touch connectors
or components, in order to avoid the risk of electric shock.
Also, do not disassemble individual components in first-level
maintenance.
WARNING: 1. Turn off the power and disconnect the AC adaptor from the power
source, to avoid exposure to electric shock.
2. Batteries in the computer retain an electrical charge, so there is danger
of electrical shock even when the computer is disconnected from an AC
power source. Remove any metal jewelry or accessories such as
necklaces, bracelets or rings, in order to reduce the risk of electric shock.
Never work with wet or damp hands.
3. Be careful of edges and corners as these may cut.
CAUTION: 1. When you change a component, be sure the replacement component
meets the required specifications. Never use foreign parts, to avoid any
risk of damage to the computer.
2. To avoid any risk of short-circuit, fire or other internal damage, never
allow any metal objects such as screws or paper clips to fall into the unit.
Be sure to replace screws with the same size as those removed. Make
sure all screws are securely fastened. Loose screws can cause short
circuits, resulting in heat, smoke or fire.
3. Before lifting out an FRU or other component, make sure all cables to
the component have been disconnected, in order to reduce the risk of
accidental electric shock.
4. If you use AC power, be sure to use the cable that came with the
computer or one recommended by Toshiba.
5. Make sure that all replacement components meet the specifications for
the computer and that all cables and connectors are securely fastened, in
order to avoid the risk of electric shock.
6. Some parts inside the computer, such as the CPU and cooling module,
become very hot during operation. Conduct repair work after they have
cooled. Be careful around the CPU and cooling module to avoid burns.