Member Avatar for ajelliott

I have a KDS monitor, about 4 years old. Works well except it sometimes changes color tone. A white page may look a little yellow and changes back to looking whiter. I checked all the cables, for cuts and tightness.

Any suggestions would be helpful.

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Intermittent yellowing of whites on an older KDS most often points to an intermittent blue channel (red+green = yellow). Causes range from an intermittent VGA/analog cable or connector to failures in the monitor’s blue video amplifier, cold solder joints on the CRT neck board, or aging electrolytic capacitors that shift voltages as the set warms. ’s cable suggestion is a sensible, low-cost starting point, and ’s nudge toward replacement is reasonable if the fault proves internal and recurring.

A practical diagnostic sequence: swap the monitor cable for a known-good cable and check connector pins for corrosion; connect the KDS to a different PC and observe whether the tint appears during POST or immediately on power-up (if it’s present before drivers load, the monitor is at fault); connect a different monitor to the same PC to rule out the video card; use the monitor OSD to reset color settings and run degauss; note whether the problem appears only after the set warms up. Temporary fixes (wriggling the cable or taping it in place) can confirm a contact problem but only mask the underlying fault.

If the defect is inside the monitor, the usual culprits are the blue-channel drive, neck-board solder joints, or failing caps. Those can often be repaired (re-soldering joints or replacing caps) at low parts cost, but CRT service involves high voltages—internal work should be left to an experienced technician. For an older consumer KDS, replacement is frequently the safest and most cost-effective option, though a repair shop estimate will confirm that.

Given ’s plan to change cables first, that is the recommended next step; if swapping cables and cross-testing with another PC still shows the tint, arrange professional service or consider replacement depending on repair cost and the monitor’s value.

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Member Avatar for MAD_DOG

It's the cable gone bad seriously time for a new monitor cable and/or a monitor. Juggle the cable till it turns white tape it into that position.

Member Avatar for i686-linux

I was given an old KDS monitor some time ago and it seems that they aren't the most reliable pieces of equipment. Unfortunately, you may want to get a new/newer monitor. I tried the tape thing, and it just doesn't seem to work well enough.

Member Avatar for ajelliott

:o I am planning to change out the monitor cables. If that doesn't work I will be planning my purchase of a new monitor, in the near future.

Thank you all for the suggestions and the endless work done for others at this site.

Please close out this thread.

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