Turns on OK with sound but no picture just intermittent vertical coloured lines full picture then comes on fine after about 20 minutes - grateful for any advice

Hi,

please run a channel scan on your tv before checking for the issue again. If the issue persists, please remove all accessories from the tv before restarting it. If necessary, you can then power cycle the tv. Otherwise, you can move onto running a factory reset on your Sony tv.

Thank you.

Hi, when I open it got the sound but no picture?

Check electrolytic capacitors on the power supply board for bulged tops.

have toshiba 43vh9ua picture is purple to blue in colour does anyone have a fix... thanks nev

This is a Tcon board issue.

Could it be vertical IC loose connection. It is sometimes connected with correct tuning. Check it for crack or wiggling connection best is to resolder.

pannel failure. the lines will become perminent.

There are bad solder connections on the vertical IC. This is a small flat IC attached to a heat sink. It should have about 9-11 pins and may be marked LA7837 or something similar. Resolder the pins on this IC and that should resolve the problem.
Dan

replace the scaler board and LVDS cable

ok you have a vert sweep problem and yes its probably connected to in a way to the "tap and fix" problem! Seems to be n intermittant connection on the vertical out put Ic or maybe even on the rgb convergence ic?? The total loss of sweep though tells me that theres two differant problems! Maybe and intemittant connection on the vert output Ic as well as bad connections on the convergence ic??.