Lenovo G470 - Blank Screen/Dark Screen when i restart;

Hello Everyone,
Please help me with this weird issue;
i brought a Lenovo G470 laptop, and installed it with WINDOWS XP Service Pack 2,
but i did not get any sound, it asked me to Upgrade, when i Upgraded to Windows Service Pack 3, i got the sound but when i restart it, the screen goes dark and when i press Function key and the Key with respect to Brightness, i get the screen ..Why is this happening...
Please help....

do you see lenovo logo at start-up?

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Hello there!
I just bought myself a new gaming computer for the summer, Iwe spent about 10.000KR, thats about 1,500Usdollars, but I cant get the damned thing to work, so Im posting here hoping you experts could give me some suggestion about what to do. And by the way, Iwe build a couple of computers during my time, but lost the hang of it, and do not posess too much knowledge about the newest of hardware =)
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Should I buy a new (and more appropriate) PSU?
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Mainboard:
975X Platinum PowerUp Edition - http://global.msi.com.tw/index.php?func=proddesc&prod_no=267&maincat_no=1
PSU:
Hiper Powersupply ATX 480W Black, 14dB Type-R,120mm Fan,2xSATA,20/24pin - http://www.hipergroup.com/English/products/hpu-4m480.html
CPU:
Intel Core 2 Duo, 2.4GhZ - http://www.intel.com/products/processor/core2duo/index.htm
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Yes, I can see that now..
Iwe plugged the 4-pinned square plug into the JPW and also unplugged the CD-rom and HD just in case.
But I just tried it, and I still get a loud beeping sound that wont stop (until I turn it off) and a blank screen..
All Iwe got connected now is the JPW(4-pin square), JPWR(normal 4-pin) and ATX1(24-pin)
Thanks for the tip, sadly it wasnt enough :P..

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Hello mheskin,
Thank you for using Apple Support Communities.
For more information, take a look at:
Mac OS X: Gray screen appears during startup
http://support.apple.com/kb/ts2570
If you can't eject a CD or DVD or open the drive tray
http://support.apple.com/kb/ts2097
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Have a nice day,
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Lenovo G470 - Blank Screen/Dark Screen when i restart;

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