Inspiron 530/530a/530c
Processor
Processor type Intel® Core™ 2 Quad processor
Intel® Core™ 2 Duo processor
Intel® Pentium® Dual-Core processor
Intel® Celeron® processor
Level 2 (L2) cache At least 512 KB pipelined-burst, eight-way set
associative, writeback SRAM
Memory
Type DDR2 SDRAM(667/800-MHz)
Memory connectors four
Memory capacities 512 MB, 1 GB or 2 GB
Minimum memory 512 MB
Maximum memory 4 GB (Inspiron 530 only ) 8 GB(Inspiron 530a/530c)
Computer Information
Chipset G33/ICH9
I think your Dell is the first 530. I think I see an IDE connector in the picture you posted. It seems the first 530 is the only one supporting the IDE port.
I would try to enable video in the bios and then make sure you install the latest drivers for the onboard video. It seems the chipset is Intel so if you get the latest chipset and video drivers from the dell site it may work. Sometimes the intel chipset drivers include the onboard video drivers.
It may not work right away. You might have to enable the other monitors in the display properties. Right klik on the desktop, not an icon. klik properties, then settings tab, advanced button then monitors tab. I guess you know this already since you have 2 screens on it already, but I will explain it for everyone else who may not know. WinXP only, Vista and 7 are different. 2000 and NT may be similar to XP.