Having a bit of a very confusing issue here so looking for any suggestions i can get.Heres the deal
I have a custom PC i built a few years ago specs are as follows.
Antec Lanboy Case
Antec 450w Neo Power PSU
ASUS Nforce 2 A7N8X Rev 2.0
AMD Athlon XP 2400+
1GB PC3200 Kingston RAM
ASUS DVD-RW DL Lightscrive drive
Main Seagate 80GB HDD
Slave Maxtor 120GB HDD
ATI Radeon 9200 128MB AGP 8X Graphics
ATI TV Wonder VE
Now a while back i had a power outage after the power came back on i discovered everything fuctioned properly except for the fact i could no longer shut the PC down.Whenever i would choose shutdown either in Windows XP Pro SP2 or by using the front panel power switch the system would simply restart rather then shutdown.
A few days ago i took the system apart to try and diagnose the issue.First i completely dissabled the system to clean dust from the case/components then i began testing.Now whenever i attempt to boot the PC the motherboard gets power,I get no error Beep codes yet the power supply seems to be stuck in a reboot cycle.It sounds as if it starts a few seconds then shuts down,then repeats constantly but never booting.
For testing i tryed a Athlon XP 1800+,and various sticks of RAM and another graphics card which are all known as functional.I also tryed clearing the CMOS and removing all uneeded components to attept to get the system to boot without luck.I began thinking perhaps i have a damaged power switch on my case and even went as far as trying a 2nd case i had put away but all ends up with the same results.Last but not least i tryed a 2nd power supply which gave slightly different results.When turning on the power the system would power up a few seconds then shut off completely.
Question is are the chances more of it being i have two bad PSU's (the 2nd PSU hasnt been used in a few years) or my board is going up on me.I hope i was clear in my post as i had alot to say and any suggestions would be greatly appreciated.Thank you