when turned on it goes to green light then straight back to red standby lig?

When you searched for something like "L42VC04U stuck in standby" did you find these:

http://www.mbtvelectronics.co.uk/mbtv-electronics-store/uncategorized/hitachi-l42vc04u-power-supply-repair-kit-stuck-in-standby-with-led-on/

http://www.fixya.com/support/t9917301-hitachi_l42vc04u_b_wont_turn

http://www.tv.quuq.org/forum/index.php?topic=5976.0

http://www.tv-forums.com/forum/TV_Equipment_C4/TV_Repair_Forum_F3/Hitachi_L42VC04U_Standby_Problem_P159749/

dsaffds
November 2017