Console shows some messy code

Hi after powering on, F5 console shows messy code. Please see the below. Anyone has some suggestion? Thank you   Ž£„§ç姦‡�‡ç¤‡†ä¦Äã¥æ§¥çĤÄÄƇ¥‚¥å‡†…†ä„冄¤§Å†Å¦„¦„§g¤…bbb…äå§çÅå €ba"â$`¤¥‡@BGCÆ...