my 2002 lexus es300 is completely dead/shutdown it won't power up/on not even a dashboard lights or any lights on my battery is new, alternator, starter, relay, fuse120 is new replaced still no power

Make sure the Negative battery cable is "Grounded" to where ever it is. Usually on the block, take it off and wire brush both the cable and the spot it bolts to. You could even get a new cable as long as your doing that. Clean the positive cable connection's also since your at it.

Yes, I just fixed this issues, I changed to copper connection, it was working good but some green powder around positive pole. But as I changed them to normal lead terminal, it does not work, the phenomenal is that when power is on and you try to start then all power is off. With copper good connection at positive pole as well as positive pole (this one is grounded, make sure frame to keep battery fasten on, that is ground line in some cases), all back to run! I do not suggest copper terminal, but you have to get the two poles good connected!