Sanyo LCD-40XAZ10F Service Manual page 14

Fig. 2 Factory menu
4. Press keys of remote control "▲","▼" to select item "ISP", press key "enter"
to begin updating progress, a prompt "Updating, Pls, Waiting..." is
displaying, wait for a while until menu display (TV set is unable to accept
other operation now), please refer to the Fig. 3;