I have a old P1 233MHz and i had not used it for about 3 month, When i turned it on lastweek nothing happen so i changed the battery on the motherboard i still got no response, does any1 know what the problem could be

Check for any loose screws.
If none, try flashing BIOS. That usally helps.
Sometimes a Motherboard will not respond if ISA cards are not pushed all the way in. That also relates to PCI and many more things.
And if that doesn't works, check the Motherboard with another Supply. :rolleyes: