When the heat pitot l c r message blanks

[umk]

What does When the heat pitot L+C+R message blanks means in B777 dual engine fail/stall checklist?

[wiggy]

I'm not sure at what technical level you are working at. If you're familar with the aircraft systems I'll assume the question is simply prompted by Boeing's use of language, in which case the simple answer is

blanks

= No longer displayed or "disappears"...