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check connections

Adjust monitor brightness and contrast controls

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The monitor problem are just if your connections are not working or your brightness on the computer.

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start with Disk Tool and do a clean reinstall of the system

runDisk First Aid, MacCheck, or Norton's Disk Doctor

Start with Disk Tool and the hard drive iron might show up

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There is a problem because the system started with a sad face

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Restart the computer

Unhook all SCSI devices and restart the computer

Restart with the shift button down [turn off extensions.

Remove all extensions and add them back one at a time - restart the computer after each addition, if using System 7.5 or higher ,use Extensions Manger

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You know there is a problem because the system start and freezes.

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check power cords

check pawer strip

check screen brightness

check network connectors

check keyboard connectors

check pin in connectors

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There is a problem because you can't use your browser and it won't start.