Introduction
These are the preliminary steps that are often useful when you think about repairing something.
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If it is not obvious, check if the behaviour is actually a problem or not.
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Pro tip: even if this is the intended behaviour, you are entitled to modify it, if you like. Just it's not "fixing" anymore: that's hacking!
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Did you forget to put the plug in the socket? Did you check the battery? Is the light bulb burn out?
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Speak with friends, family or collegues. Even if they don't know anything, speaking helps a lot the reasoning.
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Speak to a rubber duck
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Take a minute to think if there is anything that could be a safety hazard.
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Check the user manual and the package, if available, and the device itself for any danger label.
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You are now ready to repair your stuff!
I want to fix razor hair clipper of Philips HC 3420 from loosing speed.
Thank you
dedi zulfikar -