I have a Sony Bravia KDL-40EX403 with a switch-on/off problem. It started by rapidly and eratically switching the picture on & off, then the whole TV on & off & on etc.
In it's current state it is an intermittent fault as follows:-
From cold & switched off: At switch on sometimes the picture and audio start up normally but only for about 20 seconds. After which either the ‘standby' or ‘on' light come on or both are off. Either way there is no picture or sound. Sometimes the ‘power on' button will bring the ‘standby' light on and then the ‘on' light, but never any picture or sound.
I have no circuit diagrams so quite lost what to check. All I've managed to do is confirm that the 12 volt power disappears from the connector (CN6403) at the top of the PSU board. The PSU board is identified as APS-254, G2HE, 4-168-556-21 on the label (1-881-411-21 on the board!).
The Main board (BAL) is 1-881-636-21.
Help!!
In it's current state it is an intermittent fault as follows:-
From cold & switched off: At switch on sometimes the picture and audio start up normally but only for about 20 seconds. After which either the ‘standby' or ‘on' light come on or both are off. Either way there is no picture or sound. Sometimes the ‘power on' button will bring the ‘standby' light on and then the ‘on' light, but never any picture or sound.
I have no circuit diagrams so quite lost what to check. All I've managed to do is confirm that the 12 volt power disappears from the connector (CN6403) at the top of the PSU board. The PSU board is identified as APS-254, G2HE, 4-168-556-21 on the label (1-881-411-21 on the board!).
The Main board (BAL) is 1-881-636-21.
Help!!
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