Post by maury
My monitor has a reddish tinge on the lower screen when I boot. It
only appears on boot while showing the advertising for the
motherboard. It does not show when the boot is finished and Windows is
showing. In the last few weeks the reddish color has advanced upwards
towards the center.
Has anyone experienced this with their monitor? (It is an old
By "old" do you mean it is a CRT (cathode ray tube) type? Or is it an
old LED monitor? Pretty easy to tell by depth and weight if it's a CRT.
CRTs don't last forever. They begin to lose their intensity (not enough
electrons coming off the heater), so users up the brightness but also
lowers the contrast. A shop can overheat the heater to burn off the
crud but that risks burning out the heater. Timings will drift over
time with CRTs.
Do you have only one video output from your computer? If not, like you
have a video card and onboard video on the motherboard, you could try
switching the monitor to the other video output. First check the BIOS
to see if you need to switch which video output to use: some will
auto-switch but some don't so you need to change the BIOS setting.
Could be a video card or onboard controller going bad rather than the
That the red tinge disappears after the POST screen disappears could be
the defect only occurs at the lower video resolution during bootup.
With CRTs, you had to adjust positioning and other controls at the
different resolutions. Resolution at boot depends on what you BIOS
uses. "Old" doesn't say how old is your computer. I thought VGA
(640x480) was used at boot-time to display the POST and BIOS screens.
After you load Windows, the video resolution changes to whatever you
selected which is likely higher than VGA mode, so the tinging goes away.
Either you can halt the boot at the POST screen and play with the
monitor's controls to adjust timings at that time or you can go into
Windows and change the video resolution down to 640x480 to see if the
red tinging reappears.
"Old" gives no clue WHAT you have. Give the brand and model of monitor,
and computer (or the mobo if you built the PC), and video card is you're
not using onboard video.