R721T number keys work inconsistently I have no problem fixing them just let me know what to do?

bmcdonnell

I am a school district that has about 500 of theses devices, some are a year old others are 2 years old. We are finding the numbers keys start to work inconsistently on these models. We have replaced keyboards, sometimes that works, we have power washed them and sometimes that works. Other times neither of these steps work and we have to replace them for our students. Is there a certain chrome version that forces these devices to malfunction? there is some sort a defect somewhere? I would just like to receive help with this. I have no problem fixing them just let me know what to do. This is very frustrating.

[Edited the thread to add the issue detail]

StevenGen

https://community.acer.com/en/discussion/675164/r721t-number-keys-work-inconsistantly

Try to do a hard reset by disconnecting the main battery and the rtc/bios batteries and leave them disconnected for 15min and reconnect, see if that helps, also disconnect the keyboard flat cable and clean their pins, as that could have had liquid spilled onto the keyboards (you know how school kids are) and that is why these R721T keys are faulty, there could be numerous issues with these laptops that all need to be checked out.