What is the screw hole size in back of tv

The 3 most common sizes for the bolts to mount the wall mount to the TV is either M8x20mm or M6x20mm or M4x20 depends on the size of the screen. This site has a chart that will show you what to look for, for your TV M6x20mm TV to Wall Mount Bracket Phillips Bolts Screws Stainless VESA 200

To know more, you have to download the service manual to this set.
http://electronicshelponline.blogspot.com/

sounds like the wrong bracket for that TV.

the four holes on rear are for wall mounted bracket, the stand that goes in bottom generally requires the removing of a cover plate which will be about size of the upper part of stand and will be approx four screws, remove cover and stand will slot in and fix with scres/bolts accordingly.

M8 - according to a document I found online for a Toshiba mounting bracket kit for their LCD TVs the bolt size is M8. It should be easily available in a large hardware store or place that sells large flat screens.
Make sure you hand tighten it into the mounting hole before attaching any brackets, to judge the proper depth for tightening. Over-tightening with a long bolt could damage the TV.

Just purchase a mount for 42" and above They come in different styles for your likening and make sure the wall bracket gets mounted into the wall studs and your all set. No major job. I get $150 all day long for those installs.

Hello. The best thing for you to do is take your bracket to a hardware store and get the largest diameter screw you can that will fit easily into the holes. Regarding length, you should try to screw into the wooden studs behind the sheetrock or plaster wall so you will want 2 and 1/2 or 3 inch screws. Be sure to drill a pilot hole for each screw but only go in half as deep as the screw is long and use a bit that is only half as big around as the screw is.

You will 4 m5x18mm and 4 m5x25mm machine screws. That should do the trick..

I am not familar with your exact model but my Panasonic TH-42PX600U 42 in. Plasma uses a generic brand wall mount. The first mount I bought would not fit so I returned it and bought a different brand which worked well. Start shopping your local stores (even walmart has a couple of different types to choose from), carefully open the packaging in case you need to return it and see if it will fit the mounting holes on the back of your TV. If it fits on the back of the TV then you should be good to go.

The universal mounts generally have a selection of screws that are to fit different makes and models of tvs.
If you bought the appropriate size mount for the size of your TV, there should be mounting holes that match your TV, and screws that will secure it.
I have not seen any mounts that use more than four.