New MSI 790GX-G65 not entering startup

[Moonbeam]

I purchase an MSI 790GX-G65 and a AMD 720 BE X3 with appropriate OCZ ram.

I got it to post one time and enter the setup. Took the garbage out to the street and came back to a black screen and have never been able to get back into the setup. Tried reset switch and clear bios many times. Nothing. I can't try different Ram as I have only the two sticks of DDR3 and only the one A3 CPU. I looked on approved equipment for that board on MSI web site and the CPU HDZ720WFGIBOX and it isn't actually one that is listed, but think is should work anyway, no?

Anyway, I took the board out of the case and laid it on a safe surface and tested it there with just the power supply, the ram, a keyboard and monitor and nothing. Fans work, some 5 LEDs light power light goes on, but will produce nothing on the monitor when it's turned on.

Do I return the MB for a replacement or is there more things I can try? It could be the ram I guess or the CPU.

 

[chucky2]

Had this happen with my first Super7 build back in the day. Turned out the Enlight power supplies (both the new original, and the new "revised model") I was using were built out of spec, and nuked the board.

Could be a power supply problem.

Have you tried an add-in video card? What about re-seating the CPU and RAM?

Chuck

 

[Moonbeam]

I got a BFG Tech LS Series LS-550 550W as per Anandtech recommendations and which also in not on MSI list of approved power supplies but which I can't imagine would not be OK, not that what I couldn't imagine means much technically.

The memory is:

OCZ Intel Extreme Edition 4GB (2 x 2GB) 240-Pin DDR3 SDRAM DDR3 1600 (PC3 12800) Dual Channel Kit Desktop Memory Model OCZ3X16004GK - Retail

I paid attention to how the CPU and ram were inserted but I guess I could try re-seating them.

What gets me is that I got only the initial post which I delete keyed into the bios which disappeared sometime while I was away for a few minutes taking out the garbage.

I don't know why the screen when black or what may have happened as it did but it seems to me that something must have blown some how. ???

 

[chucky2]

Could be something just blew.

Try unplugging it and leaving the battery for the BIOS out for a while, then before putting it back in, hitting the power buttong a couple of times. Put the BIOS battery and then power supply back in, and see if it boots. If you're lucky and it does, make sure you get into the BIOS right away and set up the proper voltage to the RAM...could be that too (I guess some Intel chipsets had this problem where they wouldn't work out of the box with RAM that wasn't set to run at 1.8v JEDEC spec...maybe you have the same thing happening here).

If that doesn't work, try another power supply.

If you've got another video card, try that.

If none of that works....dead board it sounds like.

Chuck

 

[tomatom]

* any beep codes ?

maybe the bios does not recognize your CPU

any other PS avaailable to try ?

try Google ? ...

 

[Moonbeam]

No beep codes,,,,,don't see a speaker in the case. May try installing in one that does