How do I take off the stand? I just hung the TV.

Fault to the main power supply regulator section. Either it will be a separate board, or the part of main board. Check and replace damaged component/s at its main power regulator [SMPS] section circuit. Contact any service technician. If you wish to get some details; check the site linked here. Pull up older posts.
http://electronicshelponline.blogspot.com/
It will be best to replace the power supply regulator board as card basis rather than making "Surgery" to it; which usually will make loss for both money and time. Even though you can make it right, it will cost around an amount equal to the cost of a new board; including the cost of (spare parts + service charge) More to say, most of the spare parts to it will be difficult to get from open electronic spare part market. This is true to most of the flat panel TV power supply boards; irrespective of its brand and screen size.

Try this website:

TV Parts Universal TV Stands DLP Chips ShopJimmy

It may be almost impossible to find such a stand. I suspect that it was hung on a wall and then the original stand was discarded. You might try grundig customer service. I would also suggest exploring other options like rehanging the TV or having a carpenter fashion a replacement stand from wood.

This depends on the model being hung on the stand. The size screw to use is usually listed in the manual. Also make sure to check the maximum length of the screw or you can damage the TV.

If you wish to get some details; check the site linked here. Pull up older posts. Surf the site with patience. http://electronicshelponline.blogspot.com/
Disassemble procedure to many popular brand TVs are given.

Have you checked the fuse?

Tries websites like Amazon.com,Ebay.com to buy a new wall mount bracket set for holding tvs 42-50 inches.Should work fine LCD tvs or Plasma tvs used the same wall mount bracket set.

Hi guys I have for sale two original BLACK COLOR stands for 42" dell plasma TV
Let me know if you are interested
Rod

Here is the number to Spectroniq, which is the manufactor of Protron, you should be able to purchase one from them directly.

1-877-778-8876