No signal on visiontek hd4870 fan works

I built my computer about a year ago and it worked flawlessly until last week my hd3870 crapped on me so I got the hd 4870 today and now I have no signal to my monitor. I have everything connected the right the cpu fan, the cpu 4 pin, the atx mobo plug, the ram properly seated, cdrom drive pwoered, and hd powered and conected via sata, and the 2 6pin connectors in my hd 4870.When I turn on my computer the three red lights flash on the hd4870 for a second then turn off and the graphics card appears to be working, but I just don't have a signal. Thanks in advance for your help!

Here's my build



Intel Pentium E2160 Allendale 1.8GHz LGA 775 65W Dual-Core Processor Model BX80557E2160 - Retail
Item #: N82E16819116036

Crucial Ballistix 4GB (4 x 1GB) 240-Pin DDR2 SDRAM DDR2 800 (PC2 6400) Dual Channel Kit Desktop Memory Model BL2KIT12864AA804 - Retail
Item #: N82E16820146565

GIGABYTE GA-P35-DS3L LGA 775 Intel P35 ATX All Solid Capacitor Intel Motherboard - Retail
Item #: N82E16813128059

Antec NeoPower 550 550W ATX12V SLI Certified CrossFire Ready Active PFC Power Supply - Retail
Item #: N82E16817103941

visiontek hd 4870 512 mb gc

SAMSUNG 20X DVD±R DVD Burner with LightScribe Black SATA Model SH-S203N - OEM

Western Digital Caviar SE16 WD3200KSRTL 320GB 7200 RPM SATA 3.0Gb/s Hard Drive - Retail

i found some good news:

http://forums.amd.com/game/message [...] erthread=y

it appears that the red lights flashing are normal but my video card fan speed continues to go at %100 speed and still "no signal". the lights that light up for a sec are: D1602 D1601 and D1603 ( written on your video card) D601 does not light up and I read that if it does light up it means your video card is dead but good thing it didn't.