I have a couple of questions for you.
Did you load a firmware with the configuration for a Delta printer in it?
Is your printer in RH(Repetier-Host) configured as a Delta?
When you connect to the printer with RH the log window should show the version of firmware of the printer if it can talk to it.
**For instance, I connected to my Delta (with the correct baud rate),
it initialized the printer and the firmware version along with other information shows up in the log window.
I have manual control of the printer.
I then disconnected.
THEN I went into the printer configuration and changed the baud rate from 250000 to 115200. (I am using 250000 normally)
I Applied and said OK, then I tried to connect,…
The printer reinitialized
I got no data in the log window,(version,free Ram,etc…). I had no manual control at all.
I disconnected again.
I reconfigured my baudrate to 250000 and applied it and said OK.
I connected again,
The printer initialized, and the First thing I saw in the log window was some oddball characters, the next information was all of the normal stuff,(version, free Ram, etc…)
I had manual control again and all was fine.
I did that 3 times and the same happened.
***
That is something to try, it might get you started.
There are more issues in dealing with stepper movement after you can at least talk to the printer.
For instance, stepper driver voltages, endstop configuration (using M119 for status).There is a whole section in configuration.h on how the endstops are configured, that is why a copy of your configuration.h (at least) would be helpful as Magesh has said.
First things first though, like it was mentioned, I would not worry too much about the LCD part,at least you have it visible and working(somewhat).