Praise be to Allaah.
Television, as you say, may be used for
both halaal and haraam purposes. If your father only uses it to watch
permissible things, there is nothing wrong with helping him to carry it or
to carry something to put it on; rather that is helping him in doing
something good and you have to obey him if he tells you to do that.
But if he is using it to watch things that
are haraam, then it is not permissible for you to help him in any way, not
by turning the TV on, or by carrying it or carrying something to put it on,
because Allah, may He be exalted, says (interpretation of the meaning):
“Help you one another in Al‑Birr and
At‑Taqwa (virtue, righteousness and piety); but do not help one another in
sin and transgression. And fear Allaah. Verily, Allaah is Severe in
punishment”
[al-Maa’idah 5:2]
And it is not permissible to obey him even
if he orders you to do that, because the Prophet (blessings and peace of
Allah be upon him) said: “There is no obedience if it involves disobedience
towards Allaah; obedience is only in that which is right and proper.”
Narrated by al-Bukhaari, 7257; Muslim,
1840
In that case you should advise him kindly
and gently, with wisdom and beautiful preaching.
If he uses it for both halaal and haraam
purposes, there is nothing wrong with helping him to move something to put
it on, so long as you do not know that he is going to watch something haraam
at that time.
We ask Allah, may He be exalted, to help
you to obey Him and to help you to honour your parents and treat them
kindly.
And Allah knows best.