AMD Athlon 64x2 4200+ (2.2ghz)
3GB PC2-6400 RAM (2GBx1, 1GBx1)
ATI HD4550 512MB GDDR3
Sometimes when I try to power on the machine, it will get stuck at the Compaq logo BIOS screen. It won’t advance past that. The first time, I reseated all the connections on outside of the machine and popped off the case. The machine booted into Windows normally. The problem then went away for a few days.
Today, the Compaq did the same thing again, getting stuck at the BIOS screen. This time I just popped the case off and the computer booted.
What’s the issue here? How can I got about solving it? What should I try first to resolve the issue?
I have the same problem with my compaq presario, but with a biostar motherboard (I replaced the original board). Haven't found an answer yet. It's called a "cold boot" issue. If you contact hp online tech support, they may direct you to a newer bios program; first, I would try a different power supply if you have one. Flashing the bios is always risky, and unless the newer bios has fixed your issue, it's a waste of time.
Cold boot issues are quite often the result of a flaky power supply. At first turn on when it isn't warmed up it isn't supplying the power required to initialize the system properly. Waiting a minute or 2 and then warm booting things usually work right.
Replace power supply soon as it could be stressing other components by not supplying proper power.