Do you mean the power light is flashing red / blue, or do you mean the screen is flashing red / blue?
These may provide some clue - if you go looking for spares make sure you know the exact model number!
http://www.tomsguide.com/answers/id-2454893/hitachi-42hxt12u-switch-flashing-red-blue.html
http://www.justanswer.co.uk/appliance/8vj2f-i-hitachi-l32hp03u-working-just-fine.html
XXX, July 2016
