Suggest using AC/DC power supply, 9V/1A does the job. It would be helpful to let us know specifically what shield and TFT you are using.
UTFT myGLCD(*****, 25,26,27,28);
Would be a good place to start. Swap ***** for CTE50 or CPLD depending on which display you have.
If it is a CTE shield or cheap Sainsmart rip-off of a CTE shield, you will need to uncomment line 3 in \UTFT\hardware\arm\HW_ARM_defines.h
If you are using the Sainsmart bastardised versions of Hennings UTFT libraries, get the real ones from here. UTFT Libraries
Regards,
Graham