by ober » Wed May 19, 2010 6:45 pm
Can you elaborate more on the loading program? Did you load sample program with UIC00A/B and it show successful? Since LCD does not show the string it suppose to, but did it show anything, or blank at all? Do you see a cursor? And you also mention about the Infrared sensor did not ON, how do you verify that?
Can you check the gnd pad on LCD to LM7805 voltage regulator's body? It should be connected together. No power is necessary when you are doing this check. Since you are checking this connection, please check whether the 5V output from 7805 is connected to LCD Vcc pin too. Let us know what is the result and we may advise you further.