Hi FMR074,
Welcome to Sony Community!
We're sorry to hear about this. Is there any debris under the letter "T" key? Please refer to this link for troubleshooting steps, https://us.en.kb.sony.com/app/answers/detail/a_id/38121/p/48903,49902,90994,92152/c/65,66/kw/keys%20on%20keyboard%20not%20working
We highly recommend visiting our Sony Global Web site for information on contacting the Sony Support Center in your region at http://www.sony.net/SonyInfo/Support/ to assist you with this issue.
Regards,
Jen
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