Re: CRT Monitor loses Green
William Sommerwerck
something as simple as that.
If you have access to another monitor+cable, use them to confirm that the
problem really is with the monitor, and not somewhere else.
PeterD
>My CRT monitor loses the green from time to time. Then the screen is
>all pink in the background and I can only see red and blue. Just
>about the time I'm going to toss it, the green comes back and it has
>the excellent color it's had for years. I really hate to toss it out.
>I know a fair amount about electronics and have done some tv repair.
>This is a 15" computer monitor so it's basically a tv without a tuner.
>Besides that, it seems that the only way to get a CRT monitor these
>days is a used one on ebay or a garage sale. I really do not want a
>LCD monitor, they're too hard to see if they are at a slight angle,
>and because I edit graphics, the low priced LCD screens are just too
>low in resolution and I can not afford a high end one.
>
>Any idea what might be causing this?
Bad cable or connector likely.
> The green may be gone for a few
>hours or as much as 2 days. Then suddenly it pops right back. The
>screen is not only ugly right now (no green at the moment), but hard
>to see because it's brightness is reduced without the green. I'll
>probably his some garage sales this weekend, but I'd still like to see
>if i can fix this one. Appreciate any help.
>
>Thanks
>
>James
>
>
Grant
>My CRT monitor loses the green from time to time. Then the screen is
>all pink in the background and I can only see red and blue. Just
>about the time I'm going to toss it, the green comes back and it has
>the excellent color it's had for years. I really hate to toss it out.
>I know a fair amount about electronics and have done some tv repair.
>This is a 15" computer monitor so it's basically a tv without a tuner.
>Besides that, it seems that the only way to get a CRT monitor these
>days is a used one on ebay or a garage sale. I really do not want a
>LCD monitor, they're too hard to see if they are at a slight angle,
>and because I edit graphics, the low priced LCD screens are just too
>low in resolution and I can not afford a high end one.
>
>Any idea what might be causing this? The green may be gone for a few
>hours or as much as 2 days. Then suddenly it pops right back. The
>screen is not only ugly right now (no green at the moment), but hard
>to see because it's brightness is reduced without the green. I'll
>probably his some garage sales this weekend, but I'd still like to see
>if i can fix this one. Appreciate any help.
Start tapping (bashing) the thing with a hammer (well, I used the plastic
handle of a large screwdriver :) See if you can locate where the
intermittent connection is.
A while back I had a monitor that dropped a colour like yours and even
after opening the thing up and remounting every connector I could see,
right through to the CRT socket, I never found the fault.
By the time I retired the monitor the case plastic was quite marked in
places from the fairly hard bashing I gave it to get the colours back.
Grant.
--
http://bugs.id.au/
Winston
(...)
> Start tapping (bashing) the thing with a hammer (well, I used the plastic
> handle of a large screwdriver :) See if you can locate where the
> intermittent connection is.
Suggest gently wiggle the video connector on the back.
--Winston
Allodoxaphobia
> My CRT monitor loses the green from time to time. Then the screen is
> all pink in the background and I can only see red and blue. Just
> about the time I'm going to toss it, the green comes back and it has
> the excellent color it's had for years. I really hate to toss it out.
> I know a fair amount about electronics and have done some tv repair.
> This is a 15" computer monitor so it's basically a tv without a tuner.
> Besides that, it seems that the only way to get a CRT monitor these
> days is a used one on ebay or a garage sale. I really do not want a
> LCD monitor, they're too hard to see if they are at a slight angle,
> and because I edit graphics, the low priced LCD screens are just too
> low in resolution and I can not afford a high end one.
>
> Any idea what might be causing this?
Is it on a KVM? I had one go bad that-a-way.
Jonesy
Michael A. Terrell
Jim Yanik wrote:
>
> "William Sommerwerck" <grizzle...@comcast.net> wrote in
> news:hsjp9j$u2i$1...@news.eternal-september.org:
> board.
Or a bad CRT socket.
--
Anyone wanting to run for any political office in the US should have to
have a DD214, and a honorable discharge.
Arfa Daily
<jam...@eatitall.com> wrote in message
news:m2oqu5lis1d7p2ghr...@4ax.com...
> My CRT monitor loses the green from time to time. Then the screen is
> all pink in the background and I can only see red and blue. Just
> about the time I'm going to toss it, the green comes back and it has
> the excellent color it's had for years. I really hate to toss it out.
> I know a fair amount about electronics and have done some tv repair.
> This is a 15" computer monitor so it's basically a tv without a tuner.
> Besides that, it seems that the only way to get a CRT monitor these
> days is a used one on ebay or a garage sale. I really do not want a
> LCD monitor, they're too hard to see if they are at a slight angle,
> and because I edit graphics, the low priced LCD screens are just too
> low in resolution and I can not afford a high end one.
>
> hours or as much as 2 days. Then suddenly it pops right back. The
> screen is not only ugly right now (no green at the moment), but hard
> to see because it's brightness is reduced without the green. I'll
> probably his some garage sales this weekend, but I'd still like to see
> if i can fix this one. Appreciate any help.
>
>
> James
>
Assuming that the problem is within the monitor, and not as others have
suggested, an external cable problem, then probably 75% of intermittent gun
problems are down to bad joints on the CRT base PCB, where the drive
amplifiers are usually located. Often, the drys are on output transistor
legs.
Arfa
William Sommerwerck
I didn't suggest that the cable was the problem, but rather that that was
where the OP should begin troubleshooting. Has he?
Arfa Daily
"William Sommerwerck" <grizzle...@comcast.net> wrote in message
news:hsnlm6$hu8$1...@news.eternal-september.org...
Ah, but you weren't the only one who suggested the possibility of a cable
problem William, which is why I said "others" ... :-)
Arfa
mike
> My CRT monitor loses the green from time to time. Then the screen is
> all pink in the background and I can only see red and blue. Just
> about the time I'm going to toss it, the green comes back and it has
> the excellent color it's had for years. I really hate to toss it out.
> I know a fair amount about electronics and have done some tv repair.
> This is a 15" computer monitor so it's basically a tv without a tuner.
> Besides that, it seems that the only way to get a CRT monitor these
> days is a used one on ebay or a garage sale. I really do not want a
> LCD monitor, they're too hard to see if they are at a slight angle,
> and because I edit graphics, the low priced LCD screens are just too
> low in resolution and I can not afford a high end one.
>
> Any idea what might be causing this? The green may be gone for a few
> hours or as much as 2 days. Then suddenly it pops right back. The
> screen is not only ugly right now (no green at the moment), but hard
> to see because it's brightness is reduced without the green. I'll
> probably his some garage sales this weekend, but I'd still like to see
> if i can fix this one. Appreciate any help.
>
> Thanks
>
> James
>
>
>
signal path. Put a scope on the CRT so you can look for signal when it
goes out.
If it turns out to be the CRT, and you've exhausted all other options,
you might try hitting it with a stun gun.
I've fixed shorted CRT elements that way.
Be careful to get all the electronic stuff VERY FAR AWAY so you don't blow
up good semiconductors in the process.
Winston
(...)
> It's not worth spending a lot of money or time on it, but I'll see if
> I can bring it back to full color.
Have you spritz'ed the video connector with contact cleaner?
If you can locate a loose connector to mate with the monitor
cable, you can run a continuity test. Merely 'buzzing' the
'green' pin to the inside of the monitor won't necessarily
tell you the complete story.
--Winston