Re: Sony KDL-46XBR4 - Backlight and Sound OK, no picture until on for ~30+ minutes



Hi Diah, figured I'd offer an update. I had to clear out some room in the basement due to a burst pipe so sadly this project came to a quick end resulting in recycling. Good news is recently was able to get a similar model TV that was working for free so my friend now has a working set for the time being.

Don't know if mods lock threads but that's it for this one....

Re: Sony KDL-46XBR4 - Backlight and Sound OK, no picture until on for ~30+ minutes

An update:

I've checked all the caps on the power boards and they seem to be close to what the rating says and I see no signs of failure. Reinstalled the caps and tested the TV and it powers on like before with only the backlight and no video signal.

I removed the T-Con board and the one directly connected to it underneath the heatsink assemblies so I could play with the ribbon cables. Unplugging either center ribbon cable results in that half of the display going full...

Re: Sony KDL-46XBR4 - Backlight and Sound OK, no picture until on for ~30+ minutes

Thanks Diah! I'll be pulling it apart more to give it a good clean and inspection and will try your steps and report back in a few days!

Re: Sony KDL-46XBR4 - Backlight and Sound OK, no picture until on for ~30+ minutes



Here are some hi-res photos, hopefully you can see what you need.

The hiss is a very low level from the speakers when volume is above 0. I can hear the sound completely shut off when going to 0 volume.

The TV has been on about an hour when taking these photos. The T-Con board and all the ICs behind the plates feel warm to the touch, but no video signal yet, just backlight and sound....

Hello everyone, my first thread here. Been lurking a lot and trying to re-learn some electronics repair during unemployment.

I've picked up a TV for free to try and fix for a friend whose set died. It's a Sony KDL-46XBR4. The issue is this:

The TV powers on and the backlight and speakers all function normally (you can hear static or a source if plugged in). It takes a good while before any picture is actually displayed (I was told after it "warms up from 30min to several hours). I brought it home and sure enough it eventually shows picture but I wasn't going...

Re: New Members - please post your introductions here

Hi I'm Mike from Canada! Currently unemployed because of _the stuff_ and trying to learn electronics repair in my spare time.