Long history in brief: old power supply in old computer broke, but had probably affected the MB, for a new NT was also nothing more. So I organized an old MB for 10 euros. Have a new OS on it made some fans still connected everything was top. Then computer off, unplug and put in the oven for about 6 weeks. Then back out of there HDD replaced as I had found a better one. Then the computer was not able to start. On the back of the MB GbLAN lit the lamp but that part is not simply jumped. Did everything again expanded and fitted individually because I thought that what is broken again. No reaction. since again, nearly three months ago and today I have the pleasure packed the old box (A) again to look at more closely. Was the first to connect the power adapter (A) to my current PC (B) and my NT (B) on the old computer. Well, that went to all day. Sometimes he goes, sometimes not. Time he likes to run, sometimes it breaks off shortly after the BIOS screen and just goes off by itself. Why is that? Have also noticed that sometimes it depends on whether I touch the case or example are where cables. In general the success rate is highest when the NT is not in the case. Could it be that some component causes severe voltage fluctuations? Or it could be possibly also that the housing contributes its part? That one probably via MB and housing wall somehow a current flows so that the NT then just starting for safety? I just unfortunately no other computer with which I could not test the hardware otherwise. Athlon XP 2600 + is still NEN on an old MSI KT880 Delta with 2x512MB Kingston KVR and Ner old 9600Pro. NT is a 300W Cougar A. The part I had still like to get to the run just like that and to gamble on very old games. Would be a pity, the hardware simply throw away or have them gather dust. Namely everything went before the very first NT failure yet smoothly. So any ideas why this might be or how I could test it? Can I just like eg time to build the entire computer on glass table and then see if it is on the housing?