sony kv -32FD1E/RM_864

[amin]

this set has no power
after wrking in it find that the 5v supply is dumped which feeds the uprocessor.when i have disconnect this plug,the relay is on n feeds supply the main p/s board.the line o/p receives the B+ 115v but the set do not starts as i have deplug the supply to the uprocessor.the zener diode is d660 n the plug is cn710
when the connector cn 710 is plugged d660 reading is 2v when deplugged it is 5v which means that somwhere in the A board there is the faulty one
so dear friends help plz
plz note that all the boards r doublesided