Hi all,

Here are my specs beforehand:

• ECS P4VXASD2+ (V5.0) motherboard FSB 533MHz
• Intel Pentium 4 2.40A GHz Prescott Socket 478
• 2x 256MB PC2100 DDR RAM, 2x 256MB PC133 SDRAM
• CoolMax 350W PSU
• DVD-ROM - will edit with brand & model
• 128MB ATi Radeon 9800 Pro AGP
• No hard drive

So, I just put those parts together today and I tried to power it up, with the monitor connected to the Radeon 9800 in the AGP slot (mobo does not have VGA port). After turning it on, the CPU fan, graphics fan and system fan go on. However, the monitor remains in standby mode, despite being plugged in. Also, after pushing the button on the DVD-ROM drive, it does not open. I've used the DVD-ROM drive before with absolutely no issues. The graphics card was slightly buggy when I put it on another machine, which was left outside in winter weather for 3 months. (Still that computer's integrated graphics worked fine.)

CMOS battery was replaced and jumpers are all set correctly. Now, I'm wondering whether the motherboard, CPU, PSU or GPU is the problem.

What can I do to test which part is the problem?

Just to clarify, I don't have a hard drive, so I usually boot Ubuntu from the disc drive. Anyways, thanks in advance!