Have a 5 y.o. local built white box tower that I'm happy with. Recently unplugged for ten days while on vacation. Came back and first had a hard time getting the back switch to power up, then had to use front switch reset button several times to get the entire unit to power up. Since then when I power down or unplug, it's very unreliable about powering back up on either switch. I can tell that sometimes the power is getting through due to the light on my router and other times it's not. Even if it is getting through then the front switch may have to be reset several times to actually boot. Also, after powering down at night via "shut down" on screen or using the front switch (Windows XP Home), then sometimes I can see the DVDRW trying to power up, or see the HD trying to power up - over and over and over. the receipt describes the case only as ATX4252PCT and the PSU as 340W PS for P4 w/UL. I've installed one PSU (PC power and cooling dell silencer 470) on a Dell and confident I can do this one. I've never replaced a front switch and don't know anything about this one other than it appears to be integrated with the case. Need to blow the dust out of the unit but otherwise don't know what else to do. 'fraid to shut down too many more times. So, do you think it's the PSU or the front switch or both that have a problem? Could I have killed some 5 y.o. backup battery by unplugging for 10 days? Is it a big deal finding a new front switch for an old case and getting it to work? A lightning strike took out my old router and ethernet card about six months ago (successfully replaced), is my PSU finally showing symptoms of damage? Long post I know, thanks.