Hi, I bought a SXGA+ 15" FOR MY d520 but I'm having problems with it ie it's coming on as it should!

If goes from black to misty colour then sometimes it goes for a few seconds then nothing.

Any help would be greatly appreciated.

This is my spec

Manufacturer Dell Inc.
Model 0NF743 (Microprocessor)
Chipset Vendor Intel
Chipset Model i945GM
Chipset Revision 03
Southbridge Vendor Intel
Southbridge Model 82801GHM (ICH7-M/U)
Southbridge Revision A1
System Temperature 52 °C
BIOS
Brand Dell Inc.
Version A08
Date 06/01/2009

Graphics
Monitor
Name Generic PnP Monitor on Mobile Intel 945 Express Chipset Family
Current Resolution 1024x768 pixels
Work Resolution 1024x738 pixels
State Enabled, Primary
Monitor Width 1024
Monitor Height 768
Monitor BPP 32 bits per pixel
Monitor Frequency 60 Hz
Device \\.\DISPLAY1\Monitor0
Intel Mobile Intel 945 Express Chipset Family
Manufacturer Intel
Model Mobile Intel 945 Express Chipset Family
Device ID 8086-27A2
Revision 4
Subvendor Dell (1028)
Current Performance Level Level 0
Driver version 8.15.10.1930
Count of performance levels : 1
Level 1 - "Perf Level 0"
Intel Mobile Intel 945 Express Chipset Family
Manufacturer Intel
Model Mobile Intel 945 Express Chipset Family
Device ID 8086-27A6
Revision 4
Subvendor Dell (1028)
Current Performance Level Level 0
Driver version 8.15.10.1930
Count of performance levels : 1
Level 1 - "Perf Level 0"

Windows 7 Ultimate 64-bit SP1
CPU
Intel Mobile Core 2 Duo T7200 @ 2.00GHz 56 °C
Merom 65nm Technology
RAM
4.00GB Dual-Channel DDR2 @ 332MHz (5-5-5-15)
Motherboard
Dell Inc. 0NF743 (Microprocessor) 57 °C
Graphics
Generic PnP Monitor (1024x768@60Hz)
Intel Mobile Intel 945 Express Chipset Family (Dell)
Intel Mobile Intel 945 Express Chipset Family (Dell)
Storage
465GB Western Digital WDC WD5000BPVT-16HXZT3 ATA Device (SATA) 43 °C
149GB Western Digital WDC WD1600BEVT-22A23T0 ATA Device (SATA) 36 °C
14GB SanDisk Cruzer Edge USB Device (USB)
Optical Drives
No optical disk drives detected
Audio
High Definition Audio Device