'''Caution: Static electricity in your body can ruin your laptop. The best solution is to wear an anti-static wristband.''' [ … ] IfIf your keys are sticking, unresponsive or otherwise broken, you may need to replace your keyboard. [ … ] Make sure your problem is hardware related by following our troubleshooting guide. [ … ] When buying a new keyboard, make sure it is compatible with your PCG-F420. [ … ] '''CAUTION: Static electricity in your body can ruin you computer. Use an anti-static wristband.'''

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