Dell Inspiron 530 - Screen has blue plaid lines and keyboard freezes

I recently restored my brother's Dell Inspiron that had been sitting unused for about 5 months. When I first started it up, it would only beep 4 times. Then it did launch into Windows Vista but stopped. Tried to start in safe mode; wouldn't work. Then it started having blue plaid lines all over at the Dell start-up screen. I brought it home and was able to change the BIOS to boot from the recovery CD and reinstalled everything to factory. Now a few weeks later, it is again having the same problem. After a little research, I am wondering if it has to do with the graphics card? Can anyone help?

Dell Inspiron 530
Windows Vista x64
Intel® Core™2 Duo processor E7300 (3MB L2, 2.66GHz, 1066 FSB)
Genuine Windows Vista® Home Premium Edition SP1, 64-Bit
Dell S1709W 17" Widescreen Flat Panel Monitor
3GB Dual Channel DDR2 SDRAM at 800MHz - 4 DIMMs
500GB Serial ATA Hard Drive (7200RPM) w/DataBurst Cache™
Integrated Intel Graphics Media Accelerator 3100
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More about dell inspiron screen blue plaid lines keyboard freezes
  1. If you are getting blue plaid lines, your integrated video is going bad. Possibly the motherboard might need replacement. For now you can try adding a budget video card and disabling onboard video.
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