Is it possible for a CRT monitor to damage a computer motherboard?

[mshan]

Is it possible for a CRT monitor to damage a computer?

I recently bought an used Dell P991 CRT monitor off of Ebay. It seems to function correctly except that vertical red lines bleed to the right, producing all kinds of strange colors such as small black text appearing brown, blue text appearing purple, and yellow colors having a funny red hue to them. I have degaussed the computer screen and used Nokia Monitor Test to properly converge the screen.

This screen discoloration has occaisionially disappeared, but seemed to be fluctuating a little more often recently, in addition to a new greenish discolored screen.

I would like to completely rule out that a slightly defective / uncalibrated (?) CRT monitor can damage a computer?

True?

 

[daveybrat]

I have never heard of a monitor damaging a computer before. It's more likely that the monitor itself has some issues, but no, it cannot harm your pc.

 

[biostud]

Only if you throw the monitor at the computer

Can't you just try another monitor, if it has no problems then it's probably a bad monitor.

 

[mshan]

I've connected this monitor to multiple computers and the same problem persists on all.

The monitor is useable; I just want to make sure I don't damage anything I connect the monitor to.

 

[Matthias99]

Originally posted by: mshan
I've connected this monitor to multiple computers and the same problem persists on all.

The monitor is useable; I just want to make sure I don't damage anything I connect the monitor to.

No, it will not. In theory, a high-voltage spike back down the VGA cable could damage your video card if it was not protected against that sort of thing (I don't know if modern video cards are). But this is extremely, extremely unlikely to occur even if the monitor "blows up" completely.

 

[imverygifted]

sounds more like a monitor problem

 

[Lonyo]

Have you got any speakers next to the monitor?
They can mess up the screen (magnetic interference). Had it happen with a P990, not a P991 though.

 

[mshan]

I think it's a problem intrinsic to the monitor. I have purchased some cable ferrites and they didn't make a difference.

I can live with the monitor; it isn't worth having it repaired.

I just don't want to damage anything else.

 

[JMag]

Originally posted by: biostud
Only if you throw the monitor at the computer

Can't you just try another monitor, if it has no problems then it's probably a bad monitor.

HAH! I saw this topic and wanted to come in to post EXACTLY what you said damnit!!!! (well minus the actual helpful part)

 

[Peter]

Originally posted by: mshan
Is it possible for a CRT monitor to damage a computer?

I recently bought an used Dell P991 CRT monitor off of Ebay. It seems to function correctly except that vertical red lines bleed to the right, producing all kinds of strange colors such as small black text appearing brown, blue text appearing purple, and yellow colors having a funny red hue to them. I have degaussed the computer screen and used Nokia Monitor Test to properly converge the screen.

This screen discoloration has occaisionially disappeared, but seemed to be fluctuating a little more often recently, in addition to a new greenish discolored screen.

I would like to completely rule out that a slightly defective / uncalibrated (?) CRT monitor can damage a computer?

True?

The ill-aligned Red is an adjustment problem called "convergence". Better monitors let you adjust that through their OSD menu, older ones need a trained technician to adjust it internally.

Greenish discoloration is usually missing or weak Blue.