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Started by sunnyimran | | 3 answers
RADEON HD6850 screen blanks momentarily
Hi there,I have Sapphire Radeon HD 6850, on HDMI cable. Monitor SAMSUNG S24A350H 24' LED.

System: ASUS P5QL PRO on Quadcore 2.66 GHz intel.

For approx 3 three years system has been working fineRecently, a month ago I am getting this intermittent problem that sometimes, all of a sudden screen goes blank. Monitor light is on but no screen (Monitor is not in standby state, it is in working state) for a few seconds then comes back.

I observed my GPU temp varies between 60C and 82C, fan speed upto 85%. I made it full speed manually undr catalyst. But blank screen still appears when temp is around 60C.

When screen goes blank, for testing purpose, I shifted it to DVI-To-VGA converter and connected it to VGA of monitor, there it keeps working as usual. I shifted on hdmi and screen blanking occurs.


I have clean re-installed catalyst 14.4

I have cleaned the copper contacts on my gaphics card thoroughly.

This all is no avail.

I have noticed screen sometimes going blank even at booting screen, that is outside of windows. so I think it is not windows problem.


Can updaing/refreshing Graphic Card BIOS a solution? how much risky?

GRAPHIC CARD PROPERTIES IN Catalyst Control Center
Graphics Card Manufacturer Powered by AMD
Graphics Chipset AMD Radeon HD 6800 Series
Device ID 6739
Vendor ID 1002
Subsystem ID 174B
Subsystem Vendor ID 174B
Graphics Bus Capability PCI Express 2.0
Maximum Bus Setting PCI Express 2.0 x16
BIOS Version 013.012.000.019
BIOS Part Number 113-3E174120-S4R
BIOS Date 2011/06/20
Memory Size 1024 MB
Memory Type GDDR5
Core Clock in MHz 775 MHz
Memory Clock in MHz 1000 MHz
Total Memory Bandwidth in GByte/s 128.0 GByte/s


So in short my observations are:HDMI port output goes blank momentarily. at that time VGA and DVI ports output still works.

Supposedly it in not loose contacts or corrosion on contacts, I cleaned thoroughly.Please help me. This card has given good service for long and I am not in a position to discard it.


Please suggest a solution soon
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September 17, 2014 4:37:53 AM

Hi,

The hdmi only works once the drivers are installed so check if you have the option to change a setting. If you wish to use dvi to hdmi converter and are worried about quality don`t as the main differance between the 2 are that hdmi is able to carry sound but the basic picture signal is the same so a dvi to dvi lead would be just as good if you have speaker separate from your monitor then you really don`t need a hdmi led.
September 16, 2014 12:16:38 PM

HDMI cable I managed to change with another for test. I found it is not due to cable. both cables are OK.

Then just for clearing doubts, I refreshed/cleaned the copper strips of my RAM sticks, 6GB in 4 sticks. Corsair. Also swapped their location. Problem exists. even with just one stick. So it is not due to any RAM malfunction.

Then I found CPU clock ratio in my BIOS was on AUTO, I changed to manual and to max value. thinking that CPU freq shifts might be the cause but it is not.

Then I changed a value in BIOS PCIe spread spectrum, it was on AUTO, I made it disabled. It also has to do with the PCIe clock freq. but still problem exists.

Then I observed same problem in another Operating System on same rig with completely different breed of driver than windows driver. no catalyst control center there. All default values. Problem is still there. So it is not related with Windows/driver/catalyst.

So I think problem with the card itself and most probably in HDMI circuitary. because when blank, it does work with Graphic Card->DVI->Dsub->Monitor. My Monitor SAMSUNG 24' LED has HDMI and DSub ports only. I have no other HDMI out device to confirm monitor. But HDMI cable is OK.

This is a nice Graphics setup and I don't want to discard this gr. card just due to this problem.

Please suggest if I forcefully burn the BIOS with same version of this graphic card, any possiblity?

secondly, how well the two compares, HDMI and DVI. I got best results on my screen with HDMI setup. I may have to buy a DVI->HDMI converter ( does it comes? ) so I can utilize the graphic card out DVI and monitor in HDMI provided no compromise in quality

any ideas?
September 14, 2014 7:39:13 AM

Hi,

I have a similar problem when connecting through dvi to flatscreen tv,It goes blank and when it comes back the gamma is out. I fixed this by going into the catalyst and in one of the tabs there is an option that allows you to choice another mode that your monitor will work with,I chose I think it was true RGB and since then it has been fine. see if that option is there for you.

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