That chassis for sony is the DA4 chassis and they had a big problem with regulator failures in the main power supply. primary and secondary power regulators the location numbers are IC8002 and IC6501 i believe the part number from sony is MCZ3001DB you must get the part number that ends is (DB) or you will not reliably repair the tv. the sony part number is 6-705-810-01 they are going to cost around $20 each because they are the good parts. they are going to be about 20 pin ICs and you will just need to desolder old ones and resolder new. they will be on the board on the left looking from the back about middle of the board on the left hand side. good luck!!!
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