JVC DLA-RS4500K Service Manual page 23

If the USB memory is inserted, mount and check whether the
predetermined folder and files exist.
After a short while, the LED will light up repeatedly in the order
of WARNING  LIGHT  STANDBY/ON. The interval of light-
ing up will become shorter as it progresses.
Once the LED of the "LAN terminal" of the projector turns off,
update is completed.
Check that the power of the projector is turned off, and then re-
move the AC cable. (Hardware Reset)
Display during overwrite error:
When an overwrite error has occurred, the 3 LEDs, STANDBY/
ON, LIGHT, and WARNING will blink. In this case, remove the
AC cable.
(No.PA056<Rev.002>) 23