I'm running windows 7 x64 and whenever I turn my computer off, I get a black screen. When I leave it for a few hours the computer then boots normally without any problems. When I do get the black screen, the operating system still runs since I can hear the windows logon sound when I type in my password and press enter, I get information on my keyboard's screen when it logs in as it usually would and I can turn my computer off again with my keyboard. I am running crossfire AMD 7850s which I thought would be the problem, so I changed my video output to the integrated motherboard graphics, yet still the same problem, so I am guessing the fault isn't with my graphics cards. I've tried using a different monitor, used one video card at a time by disconnecting the other from the power and removing CF bridge, I have even disconnected my SSD (operating system drive) and tried to boot with just my hard drive and still nothing. The only other things are the RAM, CPU and motherboard, so what do I do?
What is making my computer blackscreen?
- Thread starter Ed Hunter
- Start date
- Apr 6, 2009
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Please list all of your system's components (make/model) so that we know what we are working with (if anything other than in your sig block). Also, is Windows and all of your drivers up to date? Are you overclocking anything (CPU, GPU, memory)?
Last, is this a new problem or one you have had for a while?
Last, is this a new problem or one you have had for a while?
Rig is, Intel i5 3570k, Msi 7850 + Sapphire 7850, Gigabyte Z77 D3H, 120GB Kingston V200+, 500GB WD Blue HDD, Phantom 410 Black with White Trim Case, Be Quiet! 630w Modular psu, 8gb 1600mhz Corsair LP Ram, Hyper 212 Evo cooler . There are a few windows updates which I am going to try to install on my next reboot, and all my other drivers are up to date - I will need to check the AMD graphics driver though. My graphics cards are overclocked, CPU is slightly overclocked to 3.8GHz. RAM at stock. Had this proboblem for a few months, diddn't bother me much as I just don't turn my PC off as much, since I have to wait an hour for it to boot without the black screen.
- Apr 6, 2009
- 54,220
- 3,423
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That wouldn't hurt. How old is the PSU and do you have access to another to swap in for troubleshooting?
Try everything at stock speeds first. You'll have to reset the GPUs in Catalyst (resetting the mobo CMOS won't adjust the GPUs).
Try everything at stock speeds first. You'll have to reset the GPUs in Catalyst (resetting the mobo CMOS won't adjust the GPUs).
One thing I just realized, I was messing around with my graphics cards earlier, and when I unplug both GPUs from the PSU and use the onboard video in the computer, the computer boots normally. When the cards are plugged in to the PSU and I am using onboard video, the screen is still black. I have tried only connecting one GPU at a time, taking out the crossfire bridge, using different connecting cables, but when any power is going to either of my 7850s, black screen. I have also discovered that whenever video output from the 7850s stops, this is what causes the black screen. eg; when I change settings for my GPUs, the screen adjusts and goes black, but stays that way, as it does when I try and turn it on and it blackscreens. Also if I take out the video cable at the back and plug it back in, I will get black screen again.
IamTimTech
Admirable
- Oct 13, 2014
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IamTimTech
Admirable
- Oct 13, 2014
- 1,685
- 0
- 6,160
Use that Power Supply and different graphics card in another PC, borrow a confirmed working power supply. I can say with a good deal of confidence that it is your power supply. You should contact Be Quiet! about an RMA
IamTimTech
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- Oct 13, 2014
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You see, though it worked for some time 630 watts isn't enough to run dual GPU's. Without overclock The 7850 pulls down about 250 watts at full load. The 3570k runs at 77 at load by itself. That's at least 577watts just at stock. You had your processor overclocked and both GPU's putting your total draw power well above 630watts. I'm honestly surprised that it worked as long as it did. You've over stressed your power supply and done damage. That's why it needs time to cool before it can work again, it no longer runs at full capacity.
If this tells me anything it tells me that Be Quiet! makes excellent power supplies.
Thing is though, the voltages are still all at stock. And I don't think it's due to needing to cool, as if I turn it on for 5 seconds and then turn it off again, it probably wouldn't turn on for an hour. Even sometimes, it takes many hours for it to turn on.
However I do think that my power supply has been under lots of stress as I've had it awhile, so I'm planning on getting a 750w modular one. Which one would be good? Thanks
- Oct 22, 2013
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Where do you get that from? The hd 7850 is a gpu that uses one pcie power connector making it a <150watt card.This just to be clear.
The psu seems to be a real contender to be the culprit here.Strange thing is that with one gpu it should still be alright,but it isn't.Looked at the statement that with the gpu's out of the system and working of the igp it works,but when even just one gpu is added the black screen happens.
I assume that with one hd 7850 in the system and the screen connected through that one it still gives the black screen? Tested with each one?
Tried to get rid of the current drivers with DDU and install the latest for your gpu?
Get rid of them first,after that install one of the hd 7850's and see what that does.
With the older gpu's you could try older drivers too,
http://support.amd.com/en-us/download/desktop/previous?os=Windows%207%20-%2064
thinking about 13.9 or 13.12 here.
Yep I've tried both cards separately and still the same. I even tried using the other PCI port with just one card but still nothing. I then tried using molex to PCI converters to power a graphics card, instead of the direct PCI cable from the power supply and no change.
I will try uninstalling all the graphics drivers as said. I'll then try installing old driver if that does not work.
I've cleared my CMOS now but I'm guessing my graphics cards are still overclocked, how do I reset the overclock without the cards plugged in, as I cannot use overclocking programs such as MSI afterburner with no cards plugged in.
UPDATE - I uninstalled current graphics drivers using DUU and diddn't change anything. I'm about to try installing latest and some older drivers to see if that helps - also how do I update drivers with the graphics cards unplugged, as AMD instillation detects the GPU and then installs.
However, for some reason my computer will now never show display from the graphics card, even if left for a while, unlike before, when I left it for an hour and it worked again. Also, sometimes when I boot, the computer will stop and the fans will go off after about three seconds since boot and then start again - usually does this once but it has restarted twice on one occasion.
However, for some reason my computer will now never show display from the graphics card, even if left for a while, unlike before, when I left it for an hour and it worked again. Also, sometimes when I boot, the computer will stop and the fans will go off after about three seconds since boot and then start again - usually does this once but it has restarted twice on one occasion.
Yeh with both cards in crossfire it all works again with HDMI. Had a laod of driver issues and blue screens to solve but it worked in the end.
And jsut a few weird resolution issues, screen wasn't filling the monitor, bad quality etc.. All fixed now so its all good, cheers for your help!
IamTimTech
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- Oct 13, 2014
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Glad it all worked out, I'm going to have to order a be quiet PSU and try them out myself. And to whoever asked me about where I got 250watt TDP; I got it from a few different benchmarks from a quick google search. PCpartpicker has it at 130 watts so I was clearly mistaken.
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