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new cpu and no signal

post #1 of 11
Thread Starter 
Hi, i recently bought this new cpu (amd phenom x4 3.4 ghz). I installed it and put in the stock fan that had come with the cpu. Everything installed correctly and it was all working, but the fan was very loud even though the temp was low as well as the fan speed. So i had a cpu cooling fan which i installed but when i finished, and plugged everything back in there was no signal on my monitor. Everything is working and now i have no clue what to do.

Mobo: gigabyte ma785gm-us2h
cpu: amd phenom x4 3.4 ghz
psu: ocz 600w
vid card: ati hd 4870

Things i have tryed:
-replugging various things in
-plugging monitor into mobo (still no signal)
-trying different monitor
-putting old cpu in (phenom x2, but still no signal thats why i was not able to update bios
-retryed stock fan

If anything comes to mind please post, Thank you
post #2 of 11
which plug did you plug the vga/dvi/hdmi into? the motherboard or the video card? If videocard, reseat the gpu
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post #3 of 11
Thread Starter 
Quote:
Originally Posted by Ubernoobie View Post
which plug did you plug the vga/dvi/hdmi into? the motherboard or the video card? If videocard, reseat the gpu
i tryed plugging the monitor into both the mobo and gpu, and i have no other gpu seats
post #4 of 11
BIOS cleared?

It is not a display issue. The mobo is failing to POST. If you have a POST reader, it would tell you want is wrong.
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post #5 of 11
Thread Starter 
Quote:
Originally Posted by DuckieHo View Post
BIOS cleared?

It is not a display issue. The mobo is failing to POST. If you have a POST reader, it would tell you want is wrong.
ya but my old cpu would have worked
post #6 of 11
Quote:
Originally Posted by Hamsbaby View Post
ya but my old cpu would have worked
I have the same problem with my 1090T, I just sent it back for replacement.

I can post on other chips but not my 1090T.

In fact once I power on with the 1090T I can't power off using the power switch, I need to flip the psu. The board doesn't even know there is a cpu in, I tested this by turning it on with no chip in and I get the same blinking LED with the 1090T and am unable to turn off the power via the power button.
    
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post #7 of 11
Did you upgrade your bios? If the board does not read the CPUID in the bios it will not boot. Everything will power on, but you will get a black sccreen.

Put the old CPU back in, flash the bios to the latest version and then put the new CPU in.
post #8 of 11
Thread Starter 
Quote:
Originally Posted by JF-AMD View Post
Did you upgrade your bios? If the board does not read the CPUID in the bios it will not boot. Everything will power on, but you will get a black sccreen.

Put the old CPU back in, flash the bios to the latest version and then put the new CPU in.
but with my old cpu the monitor doesnt display either
post #9 of 11
did you go from a 4 wire to 3 wire cpu fan ?
(nvm i see you retried the stock fan)
make sure your ram is still seated firmly.
Edited by pc-illiterate - 12/30/10 at 11:47pm
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post #10 of 11
I have the same issue, only I had installed the Corsair H50 today, same Proc (AMD Phenom II 955) and no post. I get no post whether I use the stock HS, or none at all (yes I tried it). When I did the no HS at all it shut itself off, assuming due to heat as it should, and everything is still seated firmly and plugged in properly.

AMD is POS...I'll be going back to Intel if I need to replace the proc and mobo...
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