SONY TV RANDOMLY FREAKS-OUT

[DennisA]

I have a 27" Sony Trinitron color tv; model: KV-27EXR15; November 1990.

On a purely random basis (cold, or warmed up, not at all for a day, or a few times in a day), the picture will look like an hourglass. Does anyone have any suggestions as to what I should look at, or into?

[allanm]

Sounds like dry joints in the east west circuit

[minnie]

Replace C517. If that doesn't fix it, replace IC531.

[minnie]

[allanm]

If a fault is intermittent there could be a dry joint. It's easy enough to check before you start changing components.