Failing monitor?

My PC has a very old - at least 14 years - Samsung SyncMaster 2043BWX LCD monitor. For the past couple weeks whenever the PC powers up or wakes from sleep the display has a strong red hue, most pronounced in the lower right quadrant. The color gradually improves, and by 30-45 seconds it's back to normal. Is this a typical failure mode for an ancient LCD monitor? I haven't tried powering off the monitor while the PC is asleep. That would certainly save power and (if I had been doing it for years) probably extend the life of the monitor, but at this point I worry it would do more harm than good.

That's the panel's backlight lamp failing, or a bad power supply/circuit. If you've had it for 14 years, it's time to put it out to pasture.

If Copilot is to be believed, the SAMSUNG 2043 BWX uses a cold cathode fluorescent backlight. At a guess, the backlight is failing, as "Garlin" suggests.

More recent LCD monitors use LED backlights. The worst ones are edge lit, better ones use 2D arrays.

You can get better monitors (full HD, 1920 X 1080) for less than 100USD, new. You may have to switch to using the motherboard's HDMI video port, though. DVI and D-Sub are pretty much of the past.