Well then!

Hello, I have problems similar to everyone else except me: when I start the PC it’s a total blackout, no beeps even the keyboard doesn’t work, the lights don’t flash not even for a second and I can’t even format because, of course, it’s a blackout. Normally the red light in front of the PC turns on and flashes as it does, but this time it stays on for a while and then goes out. At the beginning my computer was freezing; I even thought it might be the mouse battery that was dead. The fan spins, the DVD drives work, and someone told me once to just remove the battery on the motherboard and everything could be resolved, but no, that doesn’t work. Please help, I have too much stock left to burn onto DVDs. Sometimes I think it’s the RAM sticks or the hard drive, but it spins so it must be something else. Thanks for your help.
P.S.: no moralizing about having to burn as much as possible as quickly as possible. It doesn’t work like that in life.