No PC post (boot), no signal on screen, new GPU problem - Need Help!

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EmileS

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Hi guys,

Basic problem: My PC doesn't pass the post during start-up with my new GPU (PowerColor HD7870 Myst).

Detailed explanation of my problem:
I got the PowerColor HD7870 Myst about 2 weeks ago. First I tested it on my PC and it didn't work, figured it could be my bad PSU. So, I sent the card back to get tested (since I couldn't), the card was working fine on their systems, and I got myself a new PSU (Antec Neo Eco 620C, 80+ Bronze). During the 2 week period and now I'm running of my iGPU from my Intel G850. That leads me to think that my components, such as CPU, RAM, and HDDs are working fine. Previously I had a MSI GTS450 running in my PC, with no problems. I sold that card already.

Running from my iGPU my system posts (1 beep) and I can go into Windows. Running from a (very old) Forsa GeForce 8500GT the system also runs fine. Running from the PowerColor HD7870 Myst, no post, no beep, PC turns on, fans spinning, HDDs spinning, GPU fan spinning, no signal on screen.

I read a lot of forum discussion on the net, a lot of people have the same problem, some get solved, some don't. I tried all the solutions given.

PC specs:
- Intel G850
- MSI PH61A-P35 (B3)
- 2x2GB 1333mhz Patriot Performance RAM
- (New) Antec Neo Eco 620C, 80+ Bronze certified, 48A on 12V rail, also has 2x 6+2 PCIe connectors
- 2x Seagate (500GB + 2TB) HDDs
- GPU: PowerColor HD7870 Tahiti LE Myst Edition (requires 2 PCIe 6pin connectors, which the new PSU have)

Why the low specs for my Mobo and CPU? Let's just say Joburg took it.... I'm keeping the budget components until Haswell release. PC should work fine with these specs.

What I did so far:
1) Tested the different display outputs (HDMI and DVI) on my TV, current screen and another screen, still no signal.
2) Tested with other GPU in my Mobo, worked fine.
3) Tried different RAM sticks, still same problem with new GPU installed
4) Tried a PCIe 6 pin split to 2x Molex connector, with a PCIe 6 pin connector from PSU
5) Updated the BIOS
6) Reset the BIOS (Battery out for more than 10 min. no power connected; also with jumper on the Mobo)
7) Reseated everything
8) Updated BIOS again
9) Uninstalled all old Nvidea drivers from PC (don't think this will have anything to do with it, since the PC doesn't even post).
10) Checked the BIOS, it's set to auto-detect GPU (PEG if I remember correctly)
11) Didn't try a hammer.... yet

I use MSI Live Update for the BIOS update. What I did realize is that not all BIOS updates reset, like my VGA drivers. How do I completely reset the BIOS, bearing in mind I already did all the physical jumper and battery reset?

All power to CPU, Mobo, and GPU are connected. GPU does work on supplier PCs; CPU fine; RAM fine; Other GPU works. The only thing I think it could be, is my Mobo not compatible with the GPU, however, all the specs indicates it should.

On another note: I'll probably need to get another Mobo. Found the MSI H77MA-G43 at Purple Fly for R830, are they reliable (Purple Fly)? Any other suggestions on budget Mobo?

All help and suggestions will be much appreciated!
 
Does it show any kind of information after starting the pc or does it just freeze up after doing the hardware checks?

Also it wont be VGA drivers as those are only loaded during windows startup.
 
Last edited:
ChrisGeo said:
Does it show any kind of information after starting the pc or does it just freeze up after doing the hardware checks?

Also it wont be VGA drivers as those are only loaded during windows startup.
Click to expand...

It doesn't show anything. The screen stays dark, with no signal. TV also displays no signal after startup. Everything in the case startsup (Fans, HDDs, GPU fan, PSu, etc.)

I also figured it won't be the drivers... Just had to try.
 
Maverick Jester said:
Does the GPU work in another machine? Could be that yours is a dud.
Click to expand...

I sent the GPU back to get it tested. It worked fine on their PCs. They also did stress test on it without failure. Got it back today, with my new PSU, although, it still doesn't work.
 
EmileS said:
I sent the GPU back to get it tested. It worked fine on their PCs. They also did stress test on it without failure. Got it back today, with my new PSU, although, it still doesn't work.
Click to expand...

So what are their possible causes for it not working with your PC?
 
Def somehow related to the GFX.

I'd attempt to get 3rd party confirmation of the GFX being good. They say they tested it. Fck that. I've had companies tell me they tested something and then it turns out to be a straight out lie.

Assuming the GFX clears in say a friends PC, then I'd focus on the mobo, PSU and bios settings in that order. The fact that it is not beeping suggests that it is really not posting...ie its not just a question of the output going to mobo gfx vs dedi gfx port.

You say new psu...how new...did it work with the previous gfx?
 
Maverick Jester said:
So what are their possible causes for it not working with your PC?
Click to expand...
If I knew that, I wouldn't even ask :P

At first, I thought it was my crappy old PSU, so I got a new one. Now, I can only think that it is the compatibility with my mobo, however, all the specs of the mobo indicate that it should work fine.
 
Last edited:
HavocXphere said:
Def somehow related to the GFX.

I'd attempt to get 3rd party confirmation of the GFX being good. They say they tested it. Fck that. I've had companies tell me they tested something and then it turns out to be a straight out lie.

Assuming the GFX clears in say a friends PC, then I'd focus on the mobo, PSU and bios settings in that order. The fact that it is not beeping suggests that it is really not posting...ie its not just a question of the output going to mobo gfx vs dedi gfx port.

You say new psu...how new...did it work with the previous gfx?
Click to expand...

I'm also starting to wonder about the testing... However, the suppliers are reliable.

The PSU is like today new :P Bought it this week from the supplier. It's the latest version of the Antec Neo Eco 620C. It works fine if I plug in my old 8500GT
 
EmileS said:
On another note: I'll probably need to get another Mobo. Found the MSI H77MA-G43 at Purple Fly for R830, are they reliable (Purple Fly)? Any other suggestions on budget Mobo?
Click to expand...
Any comments on this?
 
This is a real head-scratcher. If you had access to another test mobo, I would try it. Quite a pain though.

Are there any LED indications on the vga card to indicate that everything is ok with regard to power etc?

Any LEDs on the motherboard to indicate correct seating of the card? Maybe the mounting onto the case is affecting a contact somewhere.

Perhaps the iGPU isn't disabling itself when you add the vga card? Might be a bios setting?

Those are the only ideas I have mate...
 
EmileS said:
I'm also starting to wonder about the testing... However, the suppliers are reliable.

The PSU is like today new :P Bought it this week from the supplier. It's the latest version of the Antec Neo Eco 620C. It works fine if I plug in my old 8500GT
Click to expand...
I see. Well then forget about testing the gfx...rather test the rig with a different psu.
 
bromster said:
This is a real head-scratcher. If you had access to another test mobo, I would try it. Quite a pain though.

Are there any LED indications on the vga card to indicate that everything is ok with regard to power etc?

Any LEDs on the motherboard to indicate correct seating of the card? Maybe the mounting onto the case is affecting a contact somewhere.

Perhaps the iGPU isn't disabling itself when you add the vga card? Might be a bios setting?

Those are the only ideas I have mate...
Click to expand...
I promise you, it's a big pain! Having this great card for more than 2 weeks, but can't play all the awesome games I have... Waiting to be played on high specs!

Haven't checked for any LED indication, will check that, thanks.

I checked BIOS setting, it's on PEG. Also, if I add my old card in there, it works. Even updated the BIOS. Don't know if I should load older drivers for BIOS?

Thanks for the posts guys!
 
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