GX800 users. How to know if local dimming is working. My back light seems to be turning on all the time. I tested it using local dimming test in YouTube.

The backlight on this TV needs some taming.

I found out that this tv does have local dimming, but its only limited to left and right side of the screen. watching sdr video + true cinema mode, you hardly notice the back light. but in HDR/DV, true cinema mode will switch the backlight to 100. i wont recommend to watch this tv in total darkness, unless ure ok with the backlight during dark scenes.

Yes it does support Dolby Vision + Atmos. DV and HDR on an LED TV is arguably pointless due to limited contrast ratio. But its nice to have them popping up on the screen when watching Netflix movies that supports them. I never tried Atmos on TV speaker as I connect this TV to an Atmos receiver so all the sound processing goes to the receiver.

I bought at Lazada for RM2999 from Maxi E Store, not sure if they got stock or not. Its the cheapest for this model anywhere ever.

It doesn't , none of the GX800 variant has local dimming .
What you are noticing has nothing to do with local dimming but the backlight system of the TV .

This is an edge-lit TV , which tend to demonstrate many of the flaws you mentioned above in a dim/dark viewing room . Also the fact that it has an IPS screen (which means it has a poor contrast ) doesn't help either .
IPS TV are typically recommended in a decently lit room because human eyes can hardly notice the changes on black level when there are ambient light sources around .
There are several new Full Array Local Dimming TV models landing in Malaysia this year , ranging from the very anticipated Sony X90H to Samsung's Q80T and Q95T  , all models will be available from size 55 " and above for the first time in MY.
I predict there will be a significant price drop compare to last year .
They are both mid-range TV , except Samsung likes to overhype on their Quantum Dots displays when they can barely utilize its benefits .
The GX800 is compatible with Dolby Vision though so that is a plus .

The 49" Q60R is also kind of crappy since it was downgraded to 60 hz .

1) GX800 is Smart TV therefore, apps is limited to their own. If you're happy with just Netflix, Youtube and Amazon Prime videos, then you dont need Android box. If you're looking into having tons of apps and games, u need to buy a separate android box. Do you use AV receiver?

2) The tv has 5 energy star rating.

3) I u ask about performance, all TV brands in their same range should perform the same. It comes to whether you like smart tv or android tv, the HDMI spec and sound system. Picture quality are all very subjective. we can spend a lifetime arguing about picture quality and in the end, nobody wins. Its best to go to electronic store and see it for yourself. thats what i would do. If you want to get down to the technical part, then you need to ask a specific question like if this tv good for gaming/movies, IPS or VA is better, OLED  and QLED, dolby vision/atmos etc then maybe somebody here can help. whats your budget though?

Soon the GX800 will be replaced by HX800. Its worth the wait I hope.

1) Dolby Vision definitely improves picture quality but only if you watch Blu-Ray disc, Netflix and Amazon prime. If you download your movies, then you won't get Dolby Vision. As for Atmos, to fully experience it, you need to connect your TV to a soundbar or AV receiver that supports it. The TV speaker wont be enough.

3) Its 2 year warranty i think. ive been using it for just over 2 weeks. No problem with the TV so far but im bothered by the uneven backlight or light leaks. But this can varies between devices. if its gets worse, ill call up panasonic if they can do anything about it. My philips last time has the same problem, they came by my house with 1-1 replacement 

1) if im not mistaken, Dolby Vision movies are copy protected and no one has been able to crack from either netflix or blu-ray. thats why you dont see dolby vision movies in torrents. there are lots of HDR movies though.

2) Below is just a sample. not mine. Some manufacturers consider certain level of light bleed/leaks acceptable because LED TV is not meant to be watched in the dark. You can actually truly enjoy this TV in normal lighting condition. So after you buy this TV, keeps the lights on, keep the windows open, and enjoy 

1) if im not mistaken, Dolby Vision movies are copy protected and no one has been able to crack from either netflix or blu-ray. thats why you dont see dolby vision movies in torrents. there are lots of HDR movies though.

2) Below is just a sample. not mine. Some manufacturers consider certain level of light bleed/leaks acceptable because LED TV is not meant to be watched in the dark. You can actually truly enjoy this TV in normal lighting condition. So after you buy this TV, keeps the lights on, keep the windows open, and enjoy 

I have the 55 inch. U might want to consider gx740. It has the same specs but has a different LCD panel and it's wayy cheaper. I don't think it matters too much to normal consumers. Under normal viewing condition, they should be about the same.

Haha didnt mean to offend you. By normal consumer I meant some consumer they are not bothered much by the technical aspect of a TV as long as the TV is good enough to watch under normal circumstances.

But if you have to ask what's the difference, the panel on the GX800 is brighter than the GX740. In the official spec from the website, the GX800 has Super Bright Panel Plus whereas GX740 has Super Bright Panel (not plus).

This simply mean the GX800 has brighter panel and produce great picture quality even under bright lit room. But not to say the GX740 is terrible, just the GX800 performs better. I hope this helps 

A) there should be an expert somewhere in this forum that can answer this question.

B) the tiny size difference is simply because of different panel parts. Gx800 has a metallic grey bezel and chrome plastic remote for premium feel. Gx740 has black bezel and normal remote.

C) bigger is always better depends on ur budget and seating distance. For 55 - 65 inch 4k tv, the distance between u and the TV ideally should be between 5 to 8 feet

Just to confirm, Panasonic warranty is normally 1 year. One sales guy said if do online warranty registration, can get one more year warranty ?

Which means to buy extra 3 years warranty to 5 years ?

Normally Panasonic using it own OS where Panasonic purchased FireOS previously.
it is same as others manufacturing TV OS which had less apps than Android OS.

Recently only Panasonic start using Android OS.

650 and 550 is the only 2 series is running Android OS.

I don't know as I didn't use it, but from numbering wise, 740 should be better than 650.

Also from spec, 740 using Hexa Chroma Drive PRO where 650 only use Hexa Chroma Drive.

From technical spec, 740 is also better than 650.

If new version out, normally you cannot or get difficult to get previous version already.

Yup, old version won't be release anymore once new version appear.

740 is not 800 series.

800 series already upgrade to HX but not 740 yet in Malaysia.
That why GX740 is still there.

Also off course you still able to find old model, what I means is it no longer in production.
TV every year release new model now, if keep produce old model, when is time for new model.

In general, higher number is better quality for Panasonic TV.
Which means generally 800 better than 740 and 740 better than 650.

Getting which, that is the decision you need to make.
To me I only will get OLED TV or Full Array LED TV.
The rest not in my list anymore.

Since the Panasonic use Oled panel for high end TV,  none of panasonic  Led TV is full array  TV .  Last one Panasonic flagship full array led tv is 2016 year, model dx900 got  512-zone full-array local dimming .