CRT Monitor Problem

More than 2 years ago I purchased a 17-inch CRT monitor
from a computer store that was replacing CRTs with LCDs
at a big discount from the usual price.

Last July 26 I started using this monitor. Everything was
fine until August 1. There were messages that kept
appearing: "OSD Lock", then "OSD Unlock", followed
by the appearance of the menu for adjusting the image
(Brightness/Contrast, etc.). The messages flash at a few
minutes interval.

Is there anyone here who has experienced this problem?
What needs to be done to get back to normal operation?

TIA to anyone who provides an answer.

Hi what's the make and model of the monitor? have you gone into the settings on the monitor itself?

omar7 said:

More than 2 years ago I purchased a 17-inch CRT monitor
from a computer store ...
Last July 26 I started using this monitor....

I would get a can of air and hose it down real good. Dust can make electronics behave strange. Verify all wire connections are in good order. You also might want to connect your power supply to a scope and see what's up.

1. Brand: ViewSonic CRT Monitor

Model: E70fB

2. "Have you gone into the settings on the monitor itself?"
Yes! When it was new I use the Menu to adjust the
Brightness/Contrast. But now with the "OSD Locked"
I can't access the Menu.

Thanks for the tip.

oscer1 said:

Hi what's the make and model of the monitor? have you gone into the settings on the monitor itself?

MourningStar said:

I would get a can of air and hose it down real good. Dust can make electronics behave strange. Verify all wire connections are in good order. You also might want to connect your power supply to a scope and see what's up.

Thanks for the tip.

The Menu button on the monitor my be stuck so it keeps alternating from locking and after unlocking.
What does osd mean?

MourningStar said:

I would get a can of air and hose it down real good. Dust can make electronics behave strange. Verify all wire connections are in good order. You also might want to connect your power supply to a scope and see what's up.

Very dangerous advice. A CRT monitor has several thousand volts inside the case, and the capacitors can retain this voltage for days - even when switched off.

Probing around the PSU could prove fatal !

BTW - who has an oscilloscope at home ? Most folk reading this thread wouldn't even know what a 'scope is.

Megahertz07 said:

The Menu button on the monitor my be stuck so it keeps alternating from locking and after unlocking.
What does osd mean?

Thanks, I will apply what's suggested in the link!

Thanks for the advice.
You are correct: I got no oscilloscope at home.

badcrc said:

Very dangerous advice. A CRT monitor has several thousand volts inside the case, and the capacitors can retain this voltage for days - even when switched off.

Probing around the PSU could prove fatal !

BTW - who has an oscilloscope at home ? Most folk reading this thread wouldn't even know what a 'scope is.