Computer won't turn on

[bas]

A friend gave me a DELL DIMENSION 4500. Worked fine until he added RAM. Now when you power on I get 3 beeps, fans come on but No video output, Can't get into BIOS. I changed video card to a Connect3D Radeon 7000 / 64MB DDR / AGP / 4X. and put PC2700 256MB RAM. Same Problem. Can you tell me where to get detailed info on motherboard or what problem might be?

Dell Dimension 4500  
Processor                Intel Pentium 4 2 GHz
Installed Memory      256 MB (DDR SDRAM)
Operating System      Microsoft Windows XP Home Edition      
Motherboard ?
Bus Speed      ?
GF3 Ti200 128 MB Video Card
Video Output Interface      AGP 4x
Hard Drive                  Maxtor
Hard Drive Interface      DMA/ATA-100 (Ultra)  
The power supply is 250 watts.  
 
Thanks  
wilkes-bs

[Calum]

Can a moderator please move this?
Thanks.

Take out the RAM he added - does it work without the extra RAM?

[bas]

He left the RAM out. (computer had no RAM in it when I got it) I put the PC2700 256 MB RAM in. I think? it's the right RAM, and the RAM worked when I took it out of another computer.

wilkes-bs

[patio]

To find out the correct RAM enter that MBoard info at crucial.com or barring that read the owners manual...

All RAM is not equal.

[GX1_Man]

Just because it fits in the slot is NOT enough.  

This will make it easier:

http://www.crucial.com/store/listparts.aspx?model=Dimension+4500+Series

[computer engineer]

[size=12][/size]
 I think that SDRAM is not match your processor
thus , replace it with DDRAM  :-/

[patio]

[size=12][/size]
 I think that SDRAM is not match your processor
thus , replace it with DDRAM  :-/

HuH ? ? ?

[NREOH]

I have a similar problem at the moment.
My Dell Inspiron 6000 started to freeze. I turned it off manually and then when i tried turning it back on the noise came on, the green lights went on but no visual display and within 5 seconds everything is gone. After about 15 or so attempts it comes back on but usually freezes again within a few minutes. I haven't added any new hardware and rebooted the cpu but the problem is still persisting. Any help would be very much appreciated

[patio]

HQ_Q it's probably best to start a new thread even though you're problem may be similar so it can recieve the proper attention...

And Welcome Aboard !