Re: Sony KDL-46XBR6 completely dead

Sorry about that. Attached are pictures of the boards along with a solder side picture of the power supply. Thanks....

I've got a Sony KDL-46XBR6 that is not powering on and is completely dead. No standby light or anything. I opened it up and checked over the power supply and didn't see anything obvious. The fuse right after the incoming AC along with the varistor are both good.

There is a connector that is not used that has a bunch of 12v pins but I'm seeing no voltage at these.

Can anyone provide any guidance on what my next steps should be?

Thanks.

Re: Samsung PN50A550S1F shutdown



Can anyone chime in on this? I would like to try getting a test pattern on my TV to see for sure if it's the main board that is having issues. Thanks....

Re: Samsung PN50A550S1F shutdown

I found that thread last night as well. I'm going to pick up one of those tantalum caps and see if that fixes it. Thanks.

Can someone tell me how to get a test pattern going on this set? Do all the cables need to be plugged in for it to do this (specifically the main board)? And what pins exactly am I connecting to do this (Vs on to 5.3v)? Info I've found on this isn't clear to me.

Re: Samsung PN50A550S1F shutdown

So I reconnected everything to the power supply except the cable going from the power supply to the main board. I still had a resistor tied from PSon to GND. I plugged in the TV and I get the relay click once, the Vs and Va voltages are good and it doesn't shutdown. If I push the power button on the TV it does nothing. I also don't hear the Samsung jingle when I plug it in. Is this normal if the main board is not connected? I'm assuming so.

Is it possible to trigger a test pattern and by passing the main board to see if everything...

I've got a Samsung 50" plasma model PN50A550S1F that I've owned for about 4 years and have put alot of hours on it. For a few months now it's been having issues when I first turn it on. It will come on and then shut down after a few seconds and repeat this until it will finally stay on. Then I have to wait a bit before sending a signal to it or it will start power cycling again. Today it would turn on but no picture and then a few seconds later it would turn off and then back on again (relaying clicking) and just keep repeating this.

After reading some very useful information...

Re: New Members - please post your introductions here

I found this website from Google while searching for info on how to diagnose and possibly fix an issue I'm experiencing with my 50" Samsung plasma TV.

I did fix my 42" Mitsubishi rear projection TV a few years back and it's still up and running so I'm optimistic I can get this TV up and running again as well. Thanks.