A330/a340
Something to remember about these flying computers.
I have read of SWLT inputs that do not work in this forum.
Take time to positively push each switch and ensure light msg appears or clears. I have demonstrated to junior mechanics that by pushing a SWLT quickly no msg appeared then selecting again but slowly and positively the msg will appear.
When doing soft resets on the o'head panel ensure a reasonable time lag (10-15secs) before reseting not a nano sec. This is a (Ctrl/Alt/Delete) function for your computer not a c/b.
Something to remember when the cockpit goes black.....