sony kv 25c5d

[Guestuser]

Hi ,I have a problem with this tv; suddenly the screen its become black and in centre of the screen there is a 3 cm circle like a rainbow, and i have seen that stand by led pulse for three times intervals and some time the screen became normal .this problem is verify after 10 min
Could someone help me thanks.

 

[Alde]

Hallo,

I think there are some dry joints in the vertical circuit.
So have a look to the IC TDA or TEA....
Perhaps you ll see your problem at once.

Also there can be more dry joints on the chassis board.

Greetings Alde

 

[Luke]

Hi,

Generally sony is well known for dry joints so Alde is right. You should consider to rework the board competely . especially you can find dry joints under the plastic frame where you don’t expect them. So be aware!

Rgds
Luke