Computer problem, help please!

Okay I'm not too good with computers so please help me out.

My Dell Inspiron 530 turns on and shows power, but displays nothing on my monitor. When I try to turn it on the power lights are yellow instead of green, the fan runs, the monitor is perfectly fine but it remains blank with a black background. I have switched the videocard and monitor from my broken computer to my older working computer and it worked fine. I checked all of the plugs to make sure none were loose, but the problem persists. Could the problem be my motherboard or power supply?

Here are my computer specs:

Desktop PC: Dell Inspiron 530

Processor
Processor class Pentium Dual-Core E2160
Processor speed 1800 GHz

Memory
Installed memory 2048 MB

Storage
Total Hard-drive capacity 250 GB
RAID Type none
Number of storage drives included 1

Multimedia
Audio Adapter Model Integrated Realtek AC'97 Audio
Audio Channels 7.1 surround
Graphics Board RAM Type DDR2
Video chipset Nvidia GeForce 8600 gt
Installed video memory 512 MB
Video bus PCI Express

Software
Operating system Microsoft Windows Vista Home Premium (32 bit)
Included Software Roxio Creator DE
McAfee


Optical Drives
Optical Drive Speed 8
Optical Drive Type DVD±R DL/DVD±RW

Expansion Slots
Open PCI Express X16 Slots 0
Number of PCI slots 2
Open PCI Express X1 Slots 1
PCI Express Slots 2
Slots 2

Display
Included monitor No
Monitor model number Dell SE198WFP
Display type LCD
Display size 19 inches

Modem / Networking
Included network card Ethernet (10/100 Mbps)

Case
Chassis style Tower (Midsize)
External Drive Bays 3
Internal Drive Bays 2
Open External Drive Bays 1
Open Internal Drive Bays 1

Other Features
Energy Star compliant No
Green No

Interface Connection
Interface connection USB - Universal Serial Bus (rear) (x4)
USB - Universal Serial Bus (front) (x4)

 

Is there any beeps?

It sounds like the motherboard is toast to me. Try pulling all the ram out and then turn it on and see if you get beeps.

http://www.ehow.com/how_895_install-ram.html

 

Nope, no beeps at all. Only sound is from the fan running, but no response from anything except the power button.

 

On a Dell this can be a bad stick of RAM. It may have 2 sticks in it. Try running it with just one and see what happens.

 

Not sure why nobody has mentioned this yet, but the Dell Inspiron 530 has Diagnostic Light Codes.

Since c_Lark_21's light is steady amber, odds are high that the power supply has failed.