I turned on our Sony KDL-37U4000 TV one morning and was dismayed to find all it did was flash its standby light. Searching the internet for clues, I quickly found a number of discussions saying that the pattern of four blinks, pause, four blinks, etc. most commonly indicated a faulty backlight inverter board. Discovered FlatTVParts.co.uk while searching for a replacement board. The website was clear and helped me find the right part, and they had a reclaimed one in stock. It arrived quickly and well packaged - it's a big old board - essentially the full height of the TV. Despite my slight nervousness about opening up the TV the operation was simple enough and the TV is now working again. Very pleased not to have had the cost and decision-making effort of replacing the TV.
In all I had to remove and replace over 30 screws (some to remove the TV's back, others to remove an internal plastic panel covering the inverter board), but they were clearly marked (thank you Sony!) and the back came off and dropped back into place pretty easily and positively.
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