Desktop Boot and Lockup

Hi,

I'm having a 'major' issue with my hp compaq pro 6300 sff - product# D8C56UT desktop computer, I was receiving an error message that stated (FW Recovery Error) I'm thinking there's something wrong with the bios, because now when I attempt to boot up the computer I'm hearing four beeps and won't even reach the p.o.s.t. screen. The last thing that I did was pull out the hard drive and format it, of course by doing so I basically have a new hard drive without any operating system installed on it. My current issue is that my hp compaq pro 6300 sff now won't attempt to try and boot up. On my motherboard there's a cmos reset button that I pressed for about one minute, I also removed the cmos battery for about the same length of time. Sometimes I hear four short beeps and supposedly for my brand of bios it has something to do with the system clock. Without getting into the bios I virtually can't do much of anything to get to the point of getting my computer to boot, at this point rather than getting more frustrated I've decided to just think about what to do next. Being honest, at this point I'm just grasping for any kind of help I can get. My current issues started when I had to replace the atx power switch. Another thing that probably contributed to my current issue is the fact that I deleted at least one of the installed partitions that came installed when I bought the computer, it was the recovery partition.

Thanks,

David