Need Help for Digital Alarm Clock

I have Soldered the circuit for Digital Alarm Clock Using 89C51.
I have programmed the controller too using the HEX codes provided.
But only the 16X2 LCD is ON without any display.
Please Help me regarding this issue.

Most of the LCD issues are due to Delay routines only ...First try to interface LCD properly then try for your digital clock ...Step by step approach is important .You may refer to LCD tutorial which is in tutorial section ..

hi manan_vyas
try to check first its all connection that it is proper
if a square boxes is coming on the signal then it mean it is not properly initializing by ur program
if nothing is displayed on the lcd even boxes then change the contrast voltage by variable
add a 250 ms delay in coding when power up also
can u upload your program

[Topic moved to Project Doubts forum]

Thanks people,
I only get the 2 rows of boxes on the LCD.
Moreover the buzzer keeps on ringing every time i switch ON the reset circuit.
The pull up resistors are of 4k7 at the output port through which the LCD is connected.

I am Attaching the code that I am using to program the uC ( the one which was recently updated on the project Download section of the digital alarm clock).

Hey and by the way I am using JHD162A LCD module

1) can u provide a complete diagram u made may be there is some error in hardware upload the diagram as u made on hardware
2) ru check the circuit on Proteus to verify your coding is correct or not
3) cdo coding step by step do not try to do all coding at once this is dificult t otrouble shoot
in first attempt just make a code that blink a pin afetr 1 second connect the led on pin it should blink now it is clear hardware is ok

now 2nd step to configure an lcd and display one character on if this ok then goto next step for clock then for calender this is a easy approach
try to change contrast of lcd and insert a delay of 250 ms delay when system powers up

Hey i used the following program to display just two chars on LCD
Still no change.

ORG 0000h
MOV A,#38H
ACALL COMNWRT
ACALL DELAY
MOV A,#0EH
ACALL COMNWRT
ACALL DELAY
MOV A,#01
ACALL COMNWRT
ACALL DELAY
MOV A,#06H
ACALL COMNWRT
ACALL DELAY
MOV A,#84H
ACALL COMNWRT
ACALL DELAY
MOV A,#'M'
ACALL DATAWRT
ACALL DELAY
MOV A,#'V'
ACALL DATAWRT

AGAIN: SJMP AGAIN
COMNWRT:
MOV P2,A
CLR P3.5
CLR P3.6
SETB P3.7
CLR P3.7
RET
DATAWRT:
MOV P2,A
SETB P3.5
CLR P3.6
SETB P3.7
CLR P3.7
RET
dELAY:
MOV R3,#50
HERE2:
MOV R4,#255
HERE:
DJNZ R4,HERE
DJNZ R3,HERE2
RET
END

code is ok i check it on Proteus it is working well here is the file u can see it firstly try a led blinking program that clear the hardware doubt still this code can 't tell us that is hardware issue of software
try this code for verifying the circuit status some time crystal damage and controller not clocking properly

ORG 0000h
BACK:
SETB P1.0
CALL DELAY
CLR P1.0
CALL DELAY
JMP BACK


DELAY:
MOV R3,#50
HERE2:
MOV R4,#255
HERE:
DJNZ R4,HERE
DJNZ R3,HERE2
RET

END

if p1.0 on and off it mean hardware is ok now try the above program u make
now what is the status of lcd black boxes or nothing displayed
also upload ur circuit diagram u make

Silly Doubt : I am using 16X2 LCD display with 16 pins..
Proteus has library for 14 pin ...
How do i resolve this