Hello there, this is my first post. I just received a barebones kit and assembled it, but it won't boot. The power LED goes on, the power switch works only for powering on but doesn't turn the machine off, the fan spins OK, the hard drive seems to be working. But the keyboard is not recognized, the monitor shows nothing and the CD ROM looks dead. The machine doesn't even beep. I tried clearing the CMOS, double-checking connections, reconnecting devices one at a time, but still nothing happened. The barebone kit consists of -PCChips A13G+ GeForce 6100 Socket AM2 Motherboard -AMD Athlon 64 3500+ Socket AM2 CPU -US Modular 1024MB PC4200 DDR2 533 MHz -Power Up Black Mid T ATX Case w/450w PSU to which I added -Maxtor SATA II/300 160 Gb hard drive -Zalman CPU cooler CNPS9500 AM2 -CD ROM, monitor, keyboard and mouse I had on my previous machine and work perfectly. The only thing I felt afraid of when assembling the machine was the more than average force I had to apply to the Zalman cooler in order to make it fit in the AM2 socket. Can it be pressing too much on the processor? Any suggestions and help will be highly appreciated. Thank you all in advance.