It would help to know
HOW it's flickering, i.e; is it the picture flickering on/off, or is the picture constant, but flickering in colors? Is it a constant flickering, or intermittent? Since you've had this Sammy DLP for >7yrs, you may already know that certain kinds of flickering can be a bulb on it's way out, some can be due to an out-of-timing color wheel, while yet ANOTHER component that can cause flickering, is a ballast that can no longer provide constant voltage to the lamp. Now, if your bulb, and especially your color wheel have been changed recently, I'd say that after 7 years, it could very well be your ballast showing it's years. Fortunately, a ballast for your set will only set you back $65, and you can get one from Discount Merchant. (Link to follow...) A ballast is very easy to switch out, especially for someone who has changed their own color wheel before.
http://www.discount-merchant.com/SAMSUN ... 195461.htm