Mr. Ganesh Selvaraj,
According to what you have written I don’t think there is any problem with the programme in the micrcontroller. You said that your 4th 7-segment display is not working well but you fixed it. Now what does that display show when the hours is in single digit? (I mean does is show 0 9 : 5 9 ?) and what does it show after 9 : 5 9?
No, 0 : 0 0 (three digits zeros only) the 4th digit of 10s hrs digit not working, after 9 : 5 9 it is not going to 1 0 : 0 0, instead 1 0 : 0 0 it is going again 0 : 0 0 (three digits zeros only 4th digit not lightup ) and run up to 9 : 5 9 then again going 0 : 0 0 and run up to 3 : 5 9, after 3 : 5 9 it is going again to 0 : 0 0 it mean, it is working as (0:00 to 9:59 two times and 0:00 to 3:59 one time) 10hrs + 10hrs + 4hrs for 24hrs, instead 12hrs format (12hrs + 12hrs = 24hrs).
Thanks,
Rajagopal.