samsung 21 inches tv crt type.when turn on the tv is ok but in a few secound or in a mins. becomes black and white?

[sjunnefergibe]

samsung 21 inches tv crt type.when turn on the tv is ok but in a few secound or in a mins. becomes black and white? plese responce my letter i need one who guide what are supposed to do, what parts replace or reheat. my feeling is sytem section but i cant sure, i need help. tnxs im waiting 4ur response

 

[penguintech]

http://www.techrepublic.com/article/get-it-done-tips-for-troubleshooting-malfunctioning-crt-monitors/