Sony KDL-32S5500 - Blink issue

[Turnip]

Hi folks,

Have one in where cust says it goes off after several hours and the red led blinks. Ran it all day and nothing  happened - perfect, so couldn't count the blinks.

Wonder if anyone knows what timed blinks represent on this model, as don't yet have a manual, as have not met one before.

Many thanks - Chris.