Overclock.net › Forums › Components › Monitors and Displays › Problem with CRT Monitor
New Posts  All Forums:Forum Nav:

Problem with CRT Monitor

post #1 of 6
Thread Starter 
Hi All,

I recently brought a new system with Sapphire HD5750, but retained my old Samsung SyncMaster 793MB CRT monitor. The contrast is very irritating when I connect the new system. There is a gray tint. I tried all the settings, updated the drivers from AMD, tried different operating systems (Windows XP, 7, Ubuntu), but the problem persists Even the games dont look that good.

When I connect my old system the display looks great. When I contacted my local dealer, he says the card does not support CRT monitors and that I should upgrade to a LCD monitor. Is that true? Is an upgrade necessary, because I was very comfortable with my old monitor.

I have tried all the available refresh rates (till 85 Hertz, the maximum available). Tried with adjusting the contrast etc. The same monitor with the same settings works perfectly well with my old system (nvidia geforce 6600gt).


System Specs

Intel i7-930

6GB Corsair RAM

Sapphire HD5750 Graphics Card
i7
(13 items)
 
  
CPUMotherboardGraphicsRAM
i7-930 X58 PRO-E HD5750 3X2 6GB Corsair Dominator Series 
Hard DriveOptical DriveOSMonitor
Western Digital 500GB Sony Windows 7 64 Bit Samsung 793MB CRT 
Power
CoolMaster 550W 
  hide details  
Reply
i7
(13 items)
 
  
CPUMotherboardGraphicsRAM
i7-930 X58 PRO-E HD5750 3X2 6GB Corsair Dominator Series 
Hard DriveOptical DriveOSMonitor
Western Digital 500GB Sony Windows 7 64 Bit Samsung 793MB CRT 
Power
CoolMaster 550W 
  hide details  
Reply
post #2 of 6
Go here and add your system to your profile. It'll make your life, and ours easier.

As for the problem, have you tried a different DVI to VGA converter? Those can be bad and cause problems like discoloration.
Test Bed
(24 items)
 
TTTbox
(15 items)
 
 
CPUMotherboardGraphicsRAM
Core i5 3570K  Biostar TZ774XE Power Color AX5770 1GB 4x4GB 1866Mhz 9-10-9-27-2T 
Hard DriveHard DriveHard DriveHard Drive
Samsung Spinpoint F3 1TB Samsung Spinpoint F3 1TB Western Digital Green 2TB Samsung Spinpoint M4 500GB 
Hard DriveOptical DriveCoolingOS
Intel X-25M G2 80GB Lite-On BluRay Drive Arctic Cooling Freezer 13 Pro Windows 7 Ultimate 
MonitorKeyboardPowerCase
Dell U2212HM Deck Legend Frost Tactile Silverstone Strider Plus 750w Custom Acrylic Test Bed 
MouseMouse PadAudioAudio
Logitech G500 Cooler Master Storm Tactics FPS Beyer Dynamics DT-990 600ohm Samson MediaOne 3A 
AudioAudioOtherOther
FiiO E09k QOGIR FiiO E17 ALPEN Microsoft Lifecam Studio Blue Yeti Pro Microphone 
CPUMotherboardGraphicsRAM
AMD A10-A5800K ASRock FM2A85X-ITX Radeon HD7770 1GB 2x8GB 1866mhz C9 
Hard DriveHard DriveOptical DriveCooling
SanDisk Ultra Plus 128GB 2TB 5400 RPM  24x DVD Drive Noctua L9A 
OSMonitorKeyboardPower
Windows 7 Home Premium 32" IPS TV Logitech K400 Seasonic G360 
CaseMouseAudio
Cooler Master Elite 120 Advanced Logitech K400 Trackpad Custom 2.1 Home Theater Setup 
  hide details  
Reply
Test Bed
(24 items)
 
TTTbox
(15 items)
 
 
CPUMotherboardGraphicsRAM
Core i5 3570K  Biostar TZ774XE Power Color AX5770 1GB 4x4GB 1866Mhz 9-10-9-27-2T 
Hard DriveHard DriveHard DriveHard Drive
Samsung Spinpoint F3 1TB Samsung Spinpoint F3 1TB Western Digital Green 2TB Samsung Spinpoint M4 500GB 
Hard DriveOptical DriveCoolingOS
Intel X-25M G2 80GB Lite-On BluRay Drive Arctic Cooling Freezer 13 Pro Windows 7 Ultimate 
MonitorKeyboardPowerCase
Dell U2212HM Deck Legend Frost Tactile Silverstone Strider Plus 750w Custom Acrylic Test Bed 
MouseMouse PadAudioAudio
Logitech G500 Cooler Master Storm Tactics FPS Beyer Dynamics DT-990 600ohm Samson MediaOne 3A 
AudioAudioOtherOther
FiiO E09k QOGIR FiiO E17 ALPEN Microsoft Lifecam Studio Blue Yeti Pro Microphone 
CPUMotherboardGraphicsRAM
AMD A10-A5800K ASRock FM2A85X-ITX Radeon HD7770 1GB 2x8GB 1866mhz C9 
Hard DriveHard DriveOptical DriveCooling
SanDisk Ultra Plus 128GB 2TB 5400 RPM  24x DVD Drive Noctua L9A 
OSMonitorKeyboardPower
Windows 7 Home Premium 32" IPS TV Logitech K400 Seasonic G360 
CaseMouseAudio
Cooler Master Elite 120 Advanced Logitech K400 Trackpad Custom 2.1 Home Theater Setup 
  hide details  
Reply
post #3 of 6
There's an art to CRT calibration.

Most are misaligned.

There are differences in the signal coming from various cards..."black level" or total signal amplitude is the problem..it's an analog thing.

There is only one good solution, aside, of course, from changing video cards.

Calibrate the monitor - but not ONLY with the available controls.

Since you're asking, I assume you're not entirely equipped to do this yourself, but if you know something about electronics, and the fact that there are "taser gun" levels of voltage inside such a monitor, or if you can find someone who can help, here's what you do.....

Open up the monitor, turn it on and let it reach operating temperature (perhaps 10 minutes or more).

Look around and locate where in that design the various gain controls are. While the monitor may have digital controls, they are ultimately digital interfaces to analog adjustments.

There are potentiometers in the monitor (volume controls), often adjusted using a small screwdriver (preferably a nylon or plastic one intended for old fashioned TV service).

Each design is slightly different.

Usually there is a gain and a bias, often for each of the primary colors.

It takes some practice to get this right.

Some of the controls may be convergence controls....avoid them unless you're attempting to adjust convergence.

There is also a control (sometimes two) on the flyback transformer...a device with a cable attached to the CRT itself, which looks like a spark plug wire (this is very close to the truth of what it is).

The controls on the flyback transformer are focus controls. Avoid them if your focus is fine.....sometimes these drift, and a monitor that's fuzzy can sometimes be made crystal clear by adjusting these.

The objective is to figure out where the controls which affect bias and gain, either for the whole image or each color, and adjust them to a more appropriate black level.

You'd need to adjust the monitor using the user controls so it's black level overshoot is a little exaggerated, so you have some room left after your adjustments for fine tuning when you're done.

Do be careful if you attempt this. This is not a safe practice if you're not sure of what you're doing. Even a monitor unplugged has static charges in the CRT that can stun or kill.

Most modern tubes drain those voltages out of the CRT after about 2 minutes of being turned off ..... if they remain grounded!

With those caveats, anyone familiar with this older tech can do it fairly easily.

It is possible to adjust a monitor with these controls to bring it to near perfection.
post #4 of 6
Thread Starter 
@Tator
I have updated the specs.
As far as the DVI to VGA converter is concerned, I am using the same one with my old system (Nvidia Geforce 6600GT) and it works like a charm. So I don't think I have a problem with it.

@Jvene
Thanks for your input.
I will try it out. But have a few questions.
So is it that the card is at fault? So will the problem persist if I change to a different monitor?
i7
(13 items)
 
  
CPUMotherboardGraphicsRAM
i7-930 X58 PRO-E HD5750 3X2 6GB Corsair Dominator Series 
Hard DriveOptical DriveOSMonitor
Western Digital 500GB Sony Windows 7 64 Bit Samsung 793MB CRT 
Power
CoolMaster 550W 
  hide details  
Reply
i7
(13 items)
 
  
CPUMotherboardGraphicsRAM
i7-930 X58 PRO-E HD5750 3X2 6GB Corsair Dominator Series 
Hard DriveOptical DriveOSMonitor
Western Digital 500GB Sony Windows 7 64 Bit Samsung 793MB CRT 
Power
CoolMaster 550W 
  hide details  
Reply
post #5 of 6
hmmm.....is the card a fault...well, one might say so.

There ought to be standardized levels for the amplitude of an analog signal. It's not correct to say that a card which generates an analog signal isn't intended to drive an analog monitor...I can't accept that.

On the other hand, there are variations for any analog circuit, so indeed various cards will have different levels of output, and the adjustments on any monitor should have sufficient range to account for reasonable variations.

Indeed, you may find that a different CRT monitor doesn't have the problem. I have 5 Dell rebadged Sony's (21 inch).....all of them are very different...as in ridiculously different.

Over the years I've see the problem you describe for a particular CRT for every computer I connect to, others that have it with about half the computers I connect to.

Adjusting the margin to account for these margins makes the CRT adaptable, and it's the only really good point of attack because you might not be able to adjust the card...because it's sending out signal at full black that's too high.

If the card is wildly out of spec, you might easily see the same result on an LCD when fed an analog signal, but then you may have a wider range of control on the LCD to accommodate that.

From here I can't declare your card at fault, but it's entirely possible that it is and yet you can adjust to account for it.

Only test gear could evaluate.
post #6 of 6
Thread Starter 
Thank you Jvene.
That explains most of my doubts. Have been breaking my head over it from days.
I am planning to buy a Dell 2209WA Monitor for a richer experience and see how it goes. Hope the card is not at fault, because convincing the dealer is a big headache, you can see the difference only if you look at the monitor for more than ten or twenty minutes, but once you observe it, it gets irritating. I guess you get the picture.
i7
(13 items)
 
  
CPUMotherboardGraphicsRAM
i7-930 X58 PRO-E HD5750 3X2 6GB Corsair Dominator Series 
Hard DriveOptical DriveOSMonitor
Western Digital 500GB Sony Windows 7 64 Bit Samsung 793MB CRT 
Power
CoolMaster 550W 
  hide details  
Reply
i7
(13 items)
 
  
CPUMotherboardGraphicsRAM
i7-930 X58 PRO-E HD5750 3X2 6GB Corsair Dominator Series 
Hard DriveOptical DriveOSMonitor
Western Digital 500GB Sony Windows 7 64 Bit Samsung 793MB CRT 
Power
CoolMaster 550W 
  hide details  
Reply
New Posts  All Forums:Forum Nav:
  Return Home
  Back to Forum: Monitors and Displays
Overclock.net › Forums › Components › Monitors and Displays › Problem with CRT Monitor