Connecting 3.5" TFT LCD Shield to Arduino UNO PROBLEMS!

Please say which Arduino. Please post a link to the actual screen you are using (or photo of pcb). What is the ID reported by MCUFRIEND_kbv ?

Update the MCUFRIEND_kbv library to the current v2.9.7 with the Library Manager.
There is a showBMP_Uno and a showBMP_not_Uno example.

David.