Green dot when I shut my monitor off

P

Peter

Guest
I have a ViewSonic G810 that I had fixed because the H.V. was turning on and
off. I just resoldered everything connected to a heat sink along with the
flyback and any big leaded components.

Anyway, now when I shut the power off on the monitor I get not really a dot,
but a splash of green in the center of the screen. I would think this is the
spot kill circuit (??? If I remember my monitor repair days correctly) but I
have no idea where this circuit is located because I don't have any
schematics and I probably woudln't know anyway even if I had them.

Could this be the spot kill circuit or the flyback on it's way to go? The
CRT is pretty clear and not fuzzy for it's age. I just want to avoid burning
a dot on the CRT.

Can anyone help me?


Thanks in advance!
 
"Peter" wrote ...
Anyway, now when I shut the power off on the monitor I get not really a
dot,
but a splash of green in the center of the screen. I would think this is
the
spot kill circuit (??? If I remember my monitor repair days correctly) but
I
have no idea where this circuit is located because I don't have any
schematics and I probably woudln't know anyway even if I had them.

Could this be the spot kill circuit or the flyback on it's way to go? The
CRT is pretty clear and not fuzzy for it's age. I just want to avoid
burning
a dot on the CRT.
Click to expand...
If you are getting "not really a dot, but a splash" then why are
you worried about "burning a dot"? How long does it last?
 
I'm worried because it may turn into a dot and burn the screen in the near
future and if I can fix it and maybe only have to replace a 10 cent cap, it
will save me from burning out a 21 inch monitor.

the "splash" lasts about 3 seconds or so.

"Richard Crowley" <rcrowley7@xprt.net> wrote in message
news:1015g2tl9u9mkdc@corp.supernews.com...
"Peter" wrote ...
Anyway, now when I shut the power off on the monitor I get not really a
dot,
but a splash of green in the center of the screen. I would think this is
the
spot kill circuit (??? If I remember my monitor repair days correctly)
but
I
have no idea where this circuit is located because I don't have any
schematics and I probably woudln't know anyway even if I had them.

Could this be the spot kill circuit or the flyback on it's way to go?
The
CRT is pretty clear and not fuzzy for it's age. I just want to avoid
burning
a dot on the CRT.

If you are getting "not really a dot, but a splash" then why are
you worried about "burning a dot"? How long does it last?
Click to expand...
 
its the bleeder resistor in the flyback.

The flyback is responsible for draining out the HV through a bleeder
resistor when it is shut off, and the HV will bleed off before the
deflection collapses, and cause it to go away.

the bleeder resistor is prolly open. they i believe, correct me if im wrong,
molded inside the flyback.






"Peter" <bpeter97@aol.com> wrote in message
news:5CAQb.13097$U%5.80000@attbi_s03...
I'm worried because it may turn into a dot and burn the screen in the near
future and if I can fix it and maybe only have to replace a 10 cent cap,
it
will save me from burning out a 21 inch monitor.

the "splash" lasts about 3 seconds or so.

"Richard Crowley" <rcrowley7@xprt.net> wrote in message
news:1015g2tl9u9mkdc@corp.supernews.com...
"Peter" wrote ...
Anyway, now when I shut the power off on the monitor I get not really
a
dot,
but a splash of green in the center of the screen. I would think this
is
the
spot kill circuit (??? If I remember my monitor repair days correctly)
but
I
have no idea where this circuit is located because I don't have any
schematics and I probably woudln't know anyway even if I had them.

Could this be the spot kill circuit or the flyback on it's way to go?
The
CRT is pretty clear and not fuzzy for it's age. I just want to avoid
burning
a dot on the CRT.

If you are getting "not really a dot, but a splash" then why are
you worried about "burning a dot"? How long does it last?
Click to expand...
 
It seems like it's getting worse. When the computer is booting up and goes
through checking the BIOS and all, the screen isn't black, it's black but
with very high contrast, then at times I'll see a vertical green line very
fant but present while it boots up. Regular windows screens is fine I
believe.

Think it's the flyback on it's way out????? How can we know for sure if the
bleeder resistor is inside the flyback or not?

Thanks for your help!!!




"Mike" <temp@temp.com> wrote in message
news:9lFQb.28245$DE.21948@fe2.columbus.rr.com...
its the bleeder resistor in the flyback.

The flyback is responsible for draining out the HV through a bleeder
resistor when it is shut off, and the HV will bleed off before the
deflection collapses, and cause it to go away.

the bleeder resistor is prolly open. they i believe, correct me if im
wrong,
molded inside the flyback.






"Peter" <bpeter97@aol.com> wrote in message
news:5CAQb.13097$U%5.80000@attbi_s03...
I'm worried because it may turn into a dot and burn the screen in the
near
future and if I can fix it and maybe only have to replace a 10 cent cap,
it
will save me from burning out a 21 inch monitor.

the "splash" lasts about 3 seconds or so.

"Richard Crowley" <rcrowley7@xprt.net> wrote in message
news:1015g2tl9u9mkdc@corp.supernews.com...
"Peter" wrote ...
Anyway, now when I shut the power off on the monitor I get not
really
a
dot,
but a splash of green in the center of the screen. I would think
this
is
the
spot kill circuit (??? If I remember my monitor repair days
correctly)
but
I
have no idea where this circuit is located because I don't have any
schematics and I probably woudln't know anyway even if I had them.

Could this be the spot kill circuit or the flyback on it's way to
go?
The
CRT is pretty clear and not fuzzy for it's age. I just want to avoid
burning
a dot on the CRT.

If you are getting "not really a dot, but a splash" then why are
you worried about "burning a dot"? How long does it last?
Click to expand...
 
On Sat, 24 Jan 2004 17:27:18 GMT, "Peter" <bpeter97@aol.com> put
finger to keyboard and composed:

I have a ViewSonic G810 that I had fixed because the H.V. was turning on and
off. I just resoldered everything connected to a heat sink along with the
flyback and any big leaded components.

Anyway, now when I shut the power off on the monitor I get not really a dot,
but a splash of green in the center of the screen. I would think this is the
spot kill circuit (??? If I remember my monitor repair days correctly) but I
have no idea where this circuit is located because I don't have any
schematics and I probably woudln't know anyway even if I had them.

Could this be the spot kill circuit or the flyback on it's way to go? The
CRT is pretty clear and not fuzzy for it's age. I just want to avoid burning
a dot on the CRT.
Click to expand...
IIRC, such faults can be attributed to the filter cap on the video amp
supply, usually of the order of 10uF 250V.


- Franc Zabkar
--
Please remove one 's' from my address when replying by email.
 
Franc Zabkar <fzabkar@optussnet.com.au> wrote in message news:<v25810djbfec8r0s3j8tltp4m6i5oeduup@4ax.com>...
On Sat, 24 Jan 2004 17:27:18 GMT, "Peter" <bpeter97@aol.com> put
finger to keyboard and composed:

I have a ViewSonic G810 that I had fixed because the H.V. was turning on and
off. I just resoldered everything connected to a heat sink along with the
flyback and any big leaded components.

Anyway, now when I shut the power off on the monitor I get not really a dot,
but a splash of green in the center of the screen. I would think this is the
spot kill circuit (??? If I remember my monitor repair days correctly) but I
have no idea where this circuit is located because I don't have any
schematics and I probably woudln't know anyway even if I had them.

Could this be the spot kill circuit or the flyback on it's way to go? The
CRT is pretty clear and not fuzzy for it's age. I just want to avoid burning
a dot on the CRT.

IIRC, such faults can be attributed to the filter cap on the video amp
supply, usually of the order of 10uF 250V.


- Franc Zabkar
Click to expand...

I would replace that monitor if I were you. CRT type color monitors
are very inexpensive these days (dirt cheap, in fact, if you can find
one whose price is reduced by a store rebate), as they are being
phased out in favor of flat-panel devices. (When my computer's monitor
went dead last year, I replaced it with an HP Pavilion MX-70
flat-screen unit that cost me only about $80 [after a rebate] at the
local Best Buy.)

My point is that monitors are so cheap now, it is not worth having
them repaired (or even trying to repair them yourself, if you are
qualified to do so) when they go belly up. The repairs will almost
certainly cost as much as or even more than you would pay for a brand
new unit, same as when today's TVs go bad after the warranty expires.


Kind regards,

Jeff Strieble, WB8NHV (mailto: jeffhs@ameritech.net)
Fairport Harbor, Ohio
 
Hmmm...

Well, maybe he doesn't have $80 to spend on a CRT. This is the
'repair' forum after all....

I'm not sure how $3.00 in caps = a brand new monitor......and besides,
some people just like the challenge of fixing things.


I would replace that monitor if I were you. CRT type color monitors
are very inexpensive these days (dirt cheap, in fact, if you can find
one whose price is reduced by a store rebate), as they are being
phased out in favor of flat-panel devices. (When my computer's monitor
went dead last year, I replaced it with an HP Pavilion MX-70
flat-screen unit that cost me only about $80 [after a rebate] at the
local Best Buy.)

My point is that monitors are so cheap now, it is not worth having
them repaired (or even trying to repair them yourself, if you are
qualified to do so) when they go belly up. The repairs will almost
certainly cost as much as or even more than you would pay for a brand
new unit, same as when today's TVs go bad after the warranty expires.


Kind regards,

Jeff Strieble, WB8NHV (mailto: jeffhs@ameritech.net)
Fairport Harbor, Ohio
Click to expand...
 
"Insomniac" <insomniac_cam@yahoo.com> wrote in message
news:cb8abd4c.0401261857.31a48125@posting.google.com...
Hmmm...

Well, maybe he doesn't have $80 to spend on a CRT. This is the
'repair' forum after all....

I'm not sure how $3.00 in caps = a brand new monitor......and besides,
some people just like the challenge of fixing things.
Click to expand...
I definitly agree, I hate to throw something away, even if I can't make any
profit on it I often fix something and find a home for it. Saves it from the
landfill and someone gets some use.
 
On Tue, 27 Jan 2004 06:29:33 GMT, "James Sweet"
<jamessweet@hotmail.com> wrote:

"Insomniac" <insomniac_cam@yahoo.com> wrote in message
news:cb8abd4c.0401261857.31a48125@posting.google.com...
Hmmm...

Well, maybe he doesn't have $80 to spend on a CRT. This is the
'repair' forum after all....

I'm not sure how $3.00 in caps = a brand new monitor......and besides,
some people just like the challenge of fixing things.



I definitly agree, I hate to throw something away, even if I can't make any
profit on it I often fix something and find a home for it. Saves it from the
landfill and someone gets some use.
Click to expand...
Absolutely. Repairing electronics is a pastime for me. Why add to the
landfill if you can give something a new lease on life and find a home
for it?

Wayne
 
Thanks everyone for agreeing with me. I thought I was crazy when I read that
message at first for wanting to fix this monitor.

Getting back to my problem though... how do I know if it's a cap or the
flyback ready to die out on me?

I have no idea what signals to look for an even worse, the time as well. I
use to fix monitors, so I know enough about safety, I would be hesitant
though after talking with people about powering it on without an isolation
transformer, plus this monitor is too bulky to work on with power. If it's
the flyback, then I'll most likely buy a new flyback, if it's a cap, ohhh
that would be even better. If anyone has any schematics for this monitor as
well, that would help, but definetly some knowledge from someone that has
seen this problem would be great because with this problem, I may eventually
burn a dot in the CRT if it gets worse.

Thanks everyone!



"Wayne" <whmrs@mrbc.ca> wrote in message news:4016706b.1089797@shawnews...
On Tue, 27 Jan 2004 06:29:33 GMT, "James Sweet"
jamessweet@hotmail.com> wrote:


"Insomniac" <insomniac_cam@yahoo.com> wrote in message
news:cb8abd4c.0401261857.31a48125@posting.google.com...
Hmmm...

Well, maybe he doesn't have $80 to spend on a CRT. This is the
'repair' forum after all....

I'm not sure how $3.00 in caps = a brand new monitor......and besides,
some people just like the challenge of fixing things.



I definitly agree, I hate to throw something away, even if I can't make
any
profit on it I often fix something and find a home for it. Saves it from
the
landfill and someone gets some use.

Absolutely. Repairing electronics is a pastime for me. Why add to the
landfill if you can give something a new lease on life and find a home
for it?

Wayne
Click to expand...
 
You must log in or register to reply here.

Welcome to EDABoard.com

Sponsor

Back
Top