T420(4177-​CTO bought only 3days) keyboard doesn't respond well

When I hit the right arrow bottum for 10 times. It only responded 8~9 times. Will this problem in the warranty? How long will this fix takes? I really need to use this computer these days.

You are in UK right? This is most likely an issue with the keyboard. If you contact warranty support they should help you out.
Regards,
Jin Li
May this year, be the year of 'DO'!
I am a volunteer, and not a paid staff of Lenovo or Microsoft

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