All the prams of keyboards on Tecra R850-S8540

The original keyboard replacement, that I installed, and occasionally the USB keyboard type at random, erratic fail to record the orders and lag.

This has happened in windows 7 and continued in 10. I have removed the keyboard and cleaned with compressed air, and installed the latest drivers for chipset for my model, but still have problems.

Names Device Manager like Lenovo ThinkPad PS/2 keyboard keyboard. .

The lenovo is no external USB keyboard?
The internal keyboard should be: Standard PS/2 keyboard

Remove all drivers keyboard and external mouse (Logitech etc...).
The internal keyboard could have a spill of liquid.

Tags: Toshiba

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