Hi, I have considered most of your tips, I am using a POT for the contrast and a resistor for the BackLight, My new discovery is that although i bought yet another LCD 4x20 the same results appear, my guess is that the datadelay and command delay are not correct, do you have any idea of what the correct values would be for this LCD?, i am pretty sure that everything else is correct because i made a simple HELLO WORLD test and the uC keeps turning off, by the way i am using a strong LM338 (5 AMPS regulator ) so i think the Power is ok.

I am going for the delays, any suggestion is appreciated as i dont kwon what this delays mean