had regular crashing for some time. Only able to reboot by disconnecting mains for few seconds. Now has refused to reboot and only activity is a couple of revs from P4 fan. Have tried disconnecting peripherals and replaced Mboard. Have tested
PSU and that is working normally including power good line. Have removed
ram and replaced individually and together to no avail.
Ram is Crucial 2 512Mb DDR PC 3200 400. Am now suspecting
RAM or
CPU. Power sw and Reset sw are ok. Before getting expensive
ram or
cpu to substitute do you have any suggestions please