Lg Plasma sound but no picture

[Morph]

Hi everyone

Total newbie here I am a carpenter by trade and have a good all round knowledge of the building trades,but i am not very good at fixing tvs.
I have always had an interest in electronics but never the time to pursue it,
friends gave me a lg 50 plasma model number PDP50X30010, that they did not want as it was broken,so to get started on my interest in electronics,this tv seems to be a good place to start.

When I plugged in the tv got sound but no picture,I have read various post on this problem but I am cautious about where to start,if there is anyone that could guide me through the testing procedures,I would be very greatful, bearing in mind I am a total novice.
One thing i have tried is to turn the tv on and leave it on for ten minutes to see if the heat sinks on the y-sus and z-sus boards warm up, the lower one on the y-sus board remain stone cold,the post says that if any of the heats sinks dont get warm then that board has a defect, That is all i have tried so far.
If anyone can help please could you be patient with me.

Thanks
Morph

[turbzz]

Re: Lg Plasma sound but no picture

Buffer boards on the y bus

Take the screws out. Take the top board out and

turn tv on if you get a black screen turn tv off then replace

and do the same to the bottom buffer board turn on

You should see a Coloured block dancing on the screen. Order the buffer board that gives you that effect

The ic fe3407f fail from the heat

[Morph]

Re: Lg Plasma sound but no picture

Hi turbzz
Firstly let me thank you for your reply, I did as you instructed and remove the top buffer board and turned the tv on still no picture but got sound. Reinstalled the top buffer and removed the bottom buffer there was still no picture but still have sound.
Is there anything else i could do to try to lock down what the problem is with this tv, again thank you for your reply.

morph

[Morph]

Re: Lg Plasma sound but no picture

Hi All

Could anyone advise me where i can get a service manuel for this tv it is an lg plasma model number pdp50x3, I would be greatful for any help.

Thank you
Morph