screen frezzes at post test

[rrnbcas]

 when I turned on my win98 and at the post screen
it freezes up. the only thing it shows is the star energy logo and the meghrtz of 350 that my computer has.
it does nothing not even the detection of my devices that it normally does. I tried to boot into the safe mode
but I can't because the startup is not going anywhere at all. nothing but the black screen with the logos.
It can't even shut down at all so I had to disconnect by unplugging it. when I turned it on again I get nothing on my monitor just complete black with the light indicator always turning from green to orange.
I went into setup(took serval times) and load the default settings. still the same problem.
I am thinking if it is the motherboard, because I installed a new video card and power supply.
Please help...
P.S. computer is 7yrs old

[Fed]

Pull it apart, re-seat your video card & double check all your connections.

[merlin_2]

does it beep on start up.....

[pcdoc4christ]

If it does give a beep code, how many beeps does it sound out and what is the name of the BIOS manufacturer that appears on the monitor display during the POST?

Also, does it display the memory check count up at all?  If not, one of the RAM sticks may have come lose or may need to be replaced.

Doc