Hi
The remote for the UHD has programmable buttons at the top.
When these are being set up the red LED flashes for 30 seconds.
There is an instruction here for programming these buttons.
(V8 series)How to copy remote buttons2019.1.23.zip
I mention this as your remote flashing for 30 seconds suggests it is in set up mode for these buttons.
That mode should not be entered when you press the other buttons.
It may be that the remote is faulty.
Try setting up the programming buttons. That may fix something.
Questions:
Does the red LED flash for 30 second if you press any button, not one of the programable ones?
Does the red LED flash for 30 seconds if you press one of the programable buttons?
Were you able to program the buttons?
If all this does not fix the problem, I suggest opening the remote and look for faults, like a solder splash around the IR LED as that is where the program buttons are.
To open the remote use your two thumb nails along the crack in the side.
Owen
Dishes; 3x3m, 2.4m and 4.1m, 10+ ku, 2 movers, USARLS. V8 Combo, Pro, V8 Golden, Nova V8Pro2, GTC, Super.V7HDs, Combo and V7s V7Plus Finder, Finder-Meter V8X / UHD V7Pro GT/XCombo. Sats 100.5E to 177W. I'm a Sat hobbyist who helps out.