Macbook Pro mid 2012 T Y U I O keys work intermittently

[profcah]

My Macbook Pro keyboard works fine EXCEPT that the t, y, u, i, and o keys will stop working. I will have to hold them down for a while or repeatedly hit them to get them to work. Interestingly, once one starts to work the others will too.; however, after the computer sits unused for a while they will again become unresponsive.
-no liquid spillage has occurred;
-I tried cleaning under the keys to no avail
Any suggestions as to what is going on, and a fix? I would rather not have to replace the keyboard. I know I could use an external keyboard, just don't want to if I can avoid it. By the way, the keys worked perfectly while doing this post but will be back to their behavior soon enough. Thanks in advance.

 

[Cory Cooper]

Hello,

Unfortunately, it does sound like either liquid damage or a hardware failure issue. Sometimes the T key starts to fail, which is linked to the other keys in the circuit of the keyboard. Connecting an external keyboard to test is a good idea while using the Keyboard Viewer function.

It could also be that Mouse Keys are enabled.

Hope that helps,

C