Walter Underwood , if your power supply is working, the first thing I would suggest you do, is to check the lid switch and make sure it is working properly and that it had not broken of. The guides for your Dreamcast [http://www.ifixit.com/Device/Sega_Dreamcast#guideList|are here]. the attached image shows the lid switch. Hope this helps, good luck.
Walter Underwood , if your power supply is working, the first thing I would suggest you do, is to check the lid switch and make sure it is working properly and that it had not broken of. The guides for your Dreamcast [http://www.ifixit.com/Device/Sega_Dreamcast#guideList|are here]. the attached image shows the lid switch. Hope this helps, good luck.
[image|173179]