In this the the backlighting is done this way - the power source delivers an low DC voltage of around 24 volts to the inverter board , the inverter board ups that to about 500 volts DC and delivers them to the CCLF tubes (basically some thin neon tubes). If you get the logo in a bright lit screen at the beginning and later you don't get any error messages or blinking lights it means that the boards are operational and the problem is located in either the image settings (go into Menu - Video - Pic Mode and set it to VIVID) or you have a bad contact that breaks when heated.\012\012\012
For that you will have to open the tv, remove the boards and redo all the iffy solderings (push on the parts while looking at the pins, it will be a lot easier to spot the weak ones this way).
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