This seems to be a common problem with Sony, especially on the 32s45 series. I've run across it three times so far at my repair shop. There's a bad solder joint on the underside of the main board...unfortunately I haven't been able to pinpoint it to any one specific place. If you slilde the pcb about halfway out of its tray and let it bend down and the problem goes away then you have to get out the pencil iron and carefully re-solder all those surface mounted components underneath. I THINK the offender is either around the big processor IC or somewhere in the quadrant around where the connector to the power board is. Good luck.

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