Which area of Penang Island are you from?

Sometimes, when the signal is strong enough to be received from a small sized UHF antenna, especially with the short line-of-sight distance from the TV tower, then just use a small sized UHF antenna is good enough.

Wirats T-9602 antenna, is it this one?


This self rotating antenna with booster, may not be suitable if the actual DTT signal in your area is strong. But first of all, could you tell us which area of Penang Island are you from?

Residing in taman goh guan ho.

My new antenna is Mr DIY HD-228C4. Much smaller than my older antenna. 
yes my old antenna is this one.

I don't think it has booster on second look.

Just tried again. This time with external tuner box that I used last time with my old TV which did not have built in decoder. Connected it to my new antenna and according to the box, was getting 100% then 0% and then back to 100%.

If you're not using their own MYTV set-top-box and you call MYTV customer service, they will malas to layan you, cuz they'll ask you to refer to the place where you buy your digital TV box receiver or TV.
(Since you didn't buy digital TV box from us, so why should we help you?)

As for manual tuning, try this method:
While you reposition/readjust your antenna, you got to monitor the signal readings at "Manual Search" page or "Signal Diagnostics" page of your digital TV receiver after you input one of these frequencies:
Mux 1: Channel 45 - 666MHz
Mux 2: Channel 43 - 650MHz

Keep adjusting/positioning your antenna until you get a strong and stable (not fluctuating) signal strength and signal quality readings.

Show us a photo of your antenna and also where/how you place and position your antenna.
And what is the cable type used for your antenna? RG-6? 3C-2V? You can check the cable type by looking at the cable jacket like this: