Dell Vostro 200 Not Booting

Most likely failed memory, but it could be a different failing component on the system board.  If removing the memory results in the beeps during POST, then your processor is most likely fine.  I'd start with replacing the memory sticks.

Are you getting any POST graphics?  (a blinking cursor counts)

Well the computer was working fine about 15-20 mins ago...after rebooting the computer this started to happen...i have removed all ram and the computer beeps 2 times...i then try one stick at a time but still does not work...i know it is a hardware problem but i am trying to find out what so i order the right thing...

No POST SCREEN...When i turn it on the fans go on to high speed and i get no beeps or screen...

beeping means hardware failure. if you take out the ram, it should not even boot up...

Did this happen randomly or after a hardware upgrade / software upgrade ?

Thanks.

I installed a few windows updates. Rebooted and that's it....The only time the PC beeps is when i take out all the ram...Right now i have CD/DVD drive unplugged and the HDD unplugged and still not booting.

Does the power button flash yellow?
If so, contact dell, there is a procedure to fix this
Try disconnecting the hard drive, attempt to boot, turn off and reinstall hard drive

How far will it get when booting? it should boot into safe mode, if not then, you will need to change the RAM.

No POST video or beeps with the memory installed, beeps without memory.  If it were a Hard Drive failure, you'd still get POST video.  This is a memory failure - coincidental, having nothing to do with the Windows Updates.

I know it has to be hardware but how would it be memory there are 4 sticks and tryed them all 1 by 1 in the systemboard... so all 4 failed?

Try them two at a time ... match sets of two, check the system board for matching layout. (Some are every other stick)

I have done that. Computer boots up and hangs with no beeps or POST with all fans on HIGH! I am thinking it is the systemboard, Power Supply, CPU...anyone have anything i can try to find out what one it is?

you missed my question

The light in the front and Solid Blue. I do have the HDD and DVD Drive already unplugged. I try turning it on and it hangs there with no Beeps, Flashing or changing lights, no POST...

When the client gave us the PC i was able to turn it on and it worked fine...i did not see this problem...i even ran a full Hardware test using a tool that i have...but this tool tested everything and it came back fine...but it does not test the Power supply...i am thinking its the power supply but i want to be 100% sure before ordering one seeing how this warranty is no more and i have to buy Dell for support...Anyone got anything? How can i test the power supply??? I DON'T have an extra one laying around or the same pc...

Do you have another power supply you can try for a moment?  If one of the legs in the power supply has failed, then you might receive symptoms similar to this.

Well here i just found out something new "I went to turn the system on and it turns on for 2 Sec shutdown and flashed yellow really quick...then it turns on its self after about 5 secs of doing this...?

That makes it sounds like a power supply, but with the previous steps you've taken I wouldn't rule out a bad motherboard yet either. As Delphineous suggested do you have a known good power supply to test with? This system does use a standard atx power supply.

I have tried a different power supply and still nothing...