Samsung plasma ps42a450 p1mxl x main board short. i replaced x mail board but it again short and sparking problem. plz help me.

Fault at its main digital board. Short circuited component/s at it. Contact any service technician; or the authorized service center. If you wish to get some details; check the site linked here. Pull up older posts. http://electronicshelponline.blogspot.com/ In most cases, the main board might have to be replaced. If so, a software [firmware] update too might be necessary.

Fault at its main digital board. Short circuited component/s at it. Contact any service technician; or the authorized service center. If you wish to get some details; check the site linked here. Surf the site with patience. Pull up older posts.
http://electronicshelponline.blogspot.com/
In most cases, the main board might have to be replaced. If so, a software [firmware] update too might be necessary.

Without any power; how can? Just replace the power board, and then check further. If you wish to get some details; check the site linked here. Pull up older posts.
http://electro-medical.blogspot.com/
http://electronicshelponline.blogspot.com/

Good day.
If you can identify those shorted transistors and you can remove them, you can actually order them from Samsung through this links http://electronicsmarket.com.au. It has everything Samsung, you will not be disappointed. Click on the link, click on Plasma TV's, then click on PS50C430, then (again) click on the version you may have and a list of possible parts will appear for this model. I didn't go through the long list (5 pages), but I believe what you're looking for is there. If not, you can contact them Website and ask not only for the transistors but you can actually get further help with your query.
Hope it helps. Cheers

Hi
This is most probably down to your Y Sustain board, This is situated on the left hand side of your TV when the back is removed, rectangular in shape about 11" by 5-6" Look for the part number on the board and google for a replacement.
The main cause of this is the module that blows under the big heat sink, this can be replaced but i would not advise if you do not have surgery soldering and de-soldering skills!!
Try these guys for a replacement LCD and Plasma TV spares

Plasma TV does not use backlight inverter board like the LCD flat panel does.
http://www.shopjimmy.com/catalogsearch/result/?q=Samsung+HPT5054

If you have a sound and no picture, especially if it flickers then it rules out the main board and CTRL board being bad. You will want to replace the Y-Main board, but when you replace the y-main board you should always replace the upper and lower ybuffer boards because they can short out your new Y-main board.

HOPE THIS WILL BE OF SOME HELP,TUNE IN YOUR TV AGAIN FROM SET UP......

Try to replace the Y Main board

It could be the LVDS cable that is connected between the logic main board and the main board, sometimes this cable is too short and comes loose from one of the boards, it could also be a sign that the logic main is going out or the panel itself is shorting out