I can confirm that the Target store specific element branded 55" 4K TV is actually the Seiki 55" 4K SE55UY04.
The mainboard number for this specific Target/Element/Seiki 55" TV is: 39J2059 1.80.99.00201
At the least, it has the same mainboard and the same power supply and the same T-Con board. This would indicate that it is the same television, with the exact same LCD panel. They are both 54.6" size rated, which indicates an exact match on the pixel pitch, which means the same LCD panel from the same panel manufacturer. Which means there is near 100% probability that the Target/Element 55" 4k TV functions with the Seiki 55"4k TV software, with no issues.
The seiki remote control codes function exactly the same as the Target/Element tv codes. (tried both on a harmony one plus remote)
I'm trying to flash the software up to a Modded EDID so that it can do things like:
4K 3840 2160 33hz
?? 3200 1800 47hz
1440p 2560 1440 72hz
1080p 1920 1080 125hz
720p 1280 720 240Hz
Which is found here: ** See link in original post **
Realistically, the panel is only fast enough to do 120hz, approx, but that's fine. (numbers quoted in the manual say 6.5ms switching speed, G to G) Odds are that the frame rate capacity of the T-Con board and chipset probably tops out at the 120hz-125hz area. The mainboard chipset may have the bandwidth to do [email protected]
, but the t-con board cannot write to the panel that fast and the panel is limited itself, in switching speed. I'd warn against trying it as the t-con board might fail, due to thermal stressing, even if one could get it to function at that frame rate. Max out at [email protected]
and leave it at that.
The original element installed software seems to have a keying code or handshake lockout, so that only the correct element software with the correct handshake can flash the mainboard's software. I tried the same USB stick that worked on a 39" Seiki that I upgraded to the 50" software, from 2013.... which has the same mainboard as this 55" target/element/Seiki TV. This USB stick and two others, would fail to load or be recognized, so I'm thinking it is a keyed software lockout that is happening here. Other than that, the USB sticks I tried, all function on the Target/Element 55" TV as they normally would. Logic assumes some sort of enforced lockout is in play, in order to give Target stores their 'special model'.
Other than this nasty bit of software enforced limiting, this appears to be the same 4k Seiki 55" monitor/TV.
My quick'n'dirty solution, may be to buy a cheap used Seiki 4k mainboard off of fleabay. Sometimes they go for as little as $20.
I paid $375cdn (plus tax) for mine, as a "last in stock, appearing out of nowhere as a single unit -repack but mint".
It appeared on the shelf at a Target store, the same morning as I walked in. Everyone in the Audio/video section, was walking around, looking for a deal, not realizing what they were walking right by. It had no price on it, but I knew it was going to be at least the last price of $449cdn, or less. It turned out to be less. I jumped onto the box and dragged it over to the cash to do a price check... and sure enough, it was discounted from the heavily discounted $449, down to $375.