Hi, i just bought a 260ST without power supply. It is a 1MB modified , with internal german Tos. I manage to connect an Amiga power supply to the Atari 260ST st power connector : GND, +5, +12 and -12 I posted picture , and the video is on its way on youtube. When i power up the computer it makes a lot of black lines, and then i can see the floppy drives boot and it reads datas (on the video you can see it even loads a screen) but the the St craches... This may be remind a specific issue to someone ? i checked things like memory, tos etc. with the diagnostic cartridge (see the picture below) ad it seems to be fine. The only thing is that i don't use an original supply. I want to have advices before buying an expensive "original" power supply for nothing... Thank you a lot.