@Harvik780
Yes, APC is surely a gud brand. But yours is a 650VA version and uve got 19" wide LCD which goes max upto 33w but a 19" flat CRT cud go upto 120w.
C2D, DDR2, etc consumes far less power than P4,DDR.
And what if he buy an 500VA one any it cudn't support the load??
So he should get at least an APC 650VA or better orelse he'wd have to change his monitor also and the total cost wud be a bomb.