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I have Acer Aspire E15 E5-571 laptop and it runs MS Windows 8.1 OS. Sometimes, when I type letter 'a' on the keyboard it does not appear on the screen. For example, when I type the first part of my email, the letter does not appear on display, although when I type the top level domain, the 'gmail.com' part, it appears on the screen. What might be the problem? P.S., Caps Lock does not respond too, sometimes.

P.S., lately I have had disassembled my laptop to figure out something from its architecture; it involved disconnecting keyboard (cable) from the system-board. After that this typing problem starts appearing. Although the rest keyboard appears to be working. Looking forward to hearing from you.

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  • Dirt/dust in the way? Tried vacuum / compressed air?
    – Xen2050
    Jan 3, 2016 at 17:31
  • Yet, it's quite new laptop, I bought it in September 2014; it appears that no dust appears in. Thus, I did not try vacuum. Nonetheless it displays the 'a' letter when I'm typing now, for some reasons.
    – ucas
    Jan 3, 2016 at 18:36
  • If it's new enough, and bought from a good store, I'd be tempted to use the warranty. But if it's "fixed" now, maybe it was just dirty. Compressed air dusting is good cleaning, with gentle air, like a commercial can, don't try 125psi or anything
    – Xen2050
    Jan 5, 2016 at 16:12

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