Hitachi CP-D10 - Shutting the Projector down; Resetting All Settings; Phenomena that May be Easy to be Mistaken for Machine Defects

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Phenomena that may be easy to be mistaken for machine defects
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Phenomenon Cases not involving a machine defect
Reference
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The electrical power cord is not plugged in.
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The main power source has been interrupted during
operation such as by a power outage (blackout), etc.
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Either there is no lamp and/or lamp cover, or either
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The signal cables are not correctly connected.
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Signal source does not correctly work.
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The input changeover settings are mismatched.
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The BLANK function for pictures and the MUTE
function for sounds are working.
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Resetting all settings
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Shutting the projector down
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Troubleshooting