PC wont boot to BIOS, just a "no input" screen

[jebritt3099]

AMD Phenom 9850 Black
4gb PC6400 ddr 800
ATI Visiontek 3870 512mb
500gb western digital HD
700w OCZ Game X StreM PSU
Windows Vista Home Premium 64

I started witha a barebones system and built it up from there. I worked perfectly for 3 weeks. I was playing WoW and I kept getting so memory errors and had to restart the game. Other than that the system worked perfectly untill a few days later, it simply wont boot. All of the fans are working except the one on the video card. The optical drive is lite up but it will not open. I dont not get any beeps. Here is what I tried thus far.

First I reset the CMOS by jumpers and battery removal.
2. I replaced the motherboard (still did not work)
3. Replaced the old 600w psu with the one mentioned above (still did not work
4. Replaced the video card (still did not work)
5. Replaced the memory (still did not work)

I have re- set the cpu with some OCZ thermal paste (still did not work)

I have tried to work forwards and backwards from barebones to complete and still nothing.

I do not have an onboard video option.

I had spent a decent amount of money on this system and just to have it diagnosed will cost $100 so I hope someone can help me out.

 

[D3CRYPTM4ST3R]

I had something like "no input" , the last time i short-circuited my Mobo. Are you sure your mobo supports the rams ( You should check for the compatibility of your board on the net, because as far as i know not all rams are supported by a particular board. if you can get us what kind of mobo you are operating maybe we could be of help.

 

[jebritt3099]

Motherboards

Here is the list of boards I have attempted.

ECS A780GM-A Motherboard
Asus M3A78 Motherboard
Biostar TA770 A2+ SE Motherboard

The first board worked for the first 2 weeks but all have failed to work since.