QUOTE(JohnLai @ Sep 26 2017, 10:38 AM)
Of course outdoor antena, aimed correctly too.
Transmitter at Lambir Hill, exact coordinate is 4.213889°, 114.046667° . Be aware Mytv coordinate at its official map is off by few km....
Distance from transmitter to :
Miri Airport area, roughly 12.5km
Krokop area, 23.47km
Lutong area, 29km
No signal. No idea why MYTV claims the transmitter already active.

That's very near. Indoor antenna should be good enough already. Did you tried indoor antenna? You try first.
Did you use any signal boosters for your outdoor antenna? If yes, you may need to remove that booster. Signal boosters are not needed for receiving digital TV as it will cause signal overload (receive too much signal), resulting in No Signal. For most cases to receive digital TV, signal boosters should not be used unless you're desperate situations, such as the cable from TV to antenna is too long/old, or the transmitter is few hundreds of kilometres away. That one is worst case scenario.
Since you said, you can only receive Brunei digital TV channels, it could mean that your outdoor antenna may be receiving overload signal for Malaysia digital TV, so the channel won't be detected at all.
But still, I suggest you try for indoor antenna first. If still can't, remove boosters from outdoor antenna if you're using it. I mean, literally remove both outdoor and indoor booster from the antenna (if you're using it), not just power it off.
I understand that MYTV may provide inaccurate info, but you can try to troubleshoot some few steps first, cuz after all they're still expanding their coverage, especially those "Blind spots" from main transmitters areas.