Proper written English will be
:-
My TV was out of order last Sunday.= TV was out of order for one day only.
or
My TV has been out of order recently = TV has been out of order for some time and it is still out of order now
or
My TV has been out of order since last Sunday. = TV was out of order last Sunday and it it still out of order now.
The correct answer is
Recently, my TV has been found out of order. (present perfect tense).
The reason for using present perfect tense is that your TV was out of order a few days/a few moment ago and it is still out of order now. When we use the words "recently" or "lately", we usually use present perfect tense to describe this situation. This is English usage.
2010-03-17 11:20:55 補充:
(present perfect tense in passive voice)
I agree with 001's answer. For 002, although the sentence without the word "found" is grammatically correct, it doesn't carry the same meaning. For example, consider this sentence. "The man was dead" does not mean the same as "The man was found dead".
If you use "Recently", do you mean that the TV is still out of order now? If so, I suggest to change to "my TV is out of order recently" or "my TV is not working properly".
Otherwise, you may replace "recently" with "lately". "my TV was out of order lately" or "my TV was not working lately".