I leave my Acer 77e on all the time. Ocassionally when the PC wakes up in
the morning, the screen remains dark and fuzzy for 15 minutes or so and then
gradually becomes perfect.
This may happen once a month or less.
Usually all is OK afterwards but yesterday the dark/fuzzy condition wuld
recur after any hibernation.
Its OK this morning.
I expect I'll have an impossible task in trying to find the weak/failing
component [capacitor?] since the condition is intermittent.
I've read Goldwasser's FAQ's
I have a schematic.
Any better clues for this model?
Thank you.

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The most common cause for what you are describing is that the picture
tube (CRT) is getting weak. The best you can do, is to measure the bias
volts at the CRT socket, and use an HV probe to verify that the anode
voltage is correct. You will need a DVM with a high voltage probe to do
this test. You will also need the service manual to have the voltage
information.

Take care, that there are serious safety issues when working in
monitors. If you are not experienced at TV and monitor service, you
would be best off taking the monitor for a proper estimate, and having
it professionaly serviced.

As for the type of monitor you have, in advance, I would say that the
best feasiblity would be to retire it, and get a new one.


Jerry G.
======



John Keiser wrote:
I leave my Acer 77e on all the time. Ocassionally when the PC wakes up in
the morning, the screen remains dark and fuzzy for 15 minutes or so and then
gradually becomes perfect.
This may happen once a month or less.
Usually all is OK afterwards but yesterday the dark/fuzzy condition wuld
recur after any hibernation.
Its OK this morning.
I expect I'll have an impossible task in trying to find the weak/failing
component [capacitor?] since the condition is intermittent.
I've read Goldwasser's FAQ's
I have a schematic.
Any better clues for this model?
Thank you.

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Jerry is correct. Also the reason why the CRT is now showing premature age /
warmup is because you leave it on all the time. The CRT is kept 'warm' all
this time with voltage on the heating element so that you dont have to
experience the gradual lighting of the screen as if you applied power
normally.

"John Keiser" wrote in message
...
I leave my Acer 77e on all the time. Ocassionally when the PC wakes up in
the morning, the screen remains dark and fuzzy for 15 minutes or so and
then gradually becomes perfect.
This may happen once a month or less.
Usually all is OK afterwards but yesterday the dark/fuzzy condition wuld
recur after any hibernation.
Its OK this morning.
I expect I'll have an impossible task in trying to find the weak/failing
component [capacitor?] since the condition is intermittent.
I've read Goldwasser's FAQ's
I have a schematic.
Any better clues for this model?
Thank you.

--
Remove -NOSPAM- to contact me.

"John Keiser" wrote in message
...
I leave my Acer 77e on all the time. Ocassionally when the PC wakes up in
the morning, the screen remains dark and fuzzy for 15 minutes or so and
then gradually becomes perfect.
This may happen once a month or less.
Usually all is OK afterwards but yesterday the dark/fuzzy condition wuld
recur after any hibernation.
Its OK this morning.
I expect I'll have an impossible task in trying to find the weak/failing
component [capacitor?] since the condition is intermittent.
I've read Goldwasser's FAQ's
I have a schematic.
Any better clues for this model?
Thank you.

I had the same problem with a 17" PC monitor, the fix was to remove the crt
socket and clean the socket and crt pins. Seems like there was a darkish
oxide on the pins/socket causing the heater voltage to drop enough to give a
soft, fuzzy pix. I guess enough current thru the pins eventually cleared up
the problem, because when the picture was normal, it was perfect. An aging
crt never looks really good - so I would try this first. Be sure to be
careful because the focus voltage also goes thru this connector and it will
knock you on your ass - don't ask me how I know g!
regards,
Tom

The monitor is 6 years old so I've gotten good use from it. But the picture
is brilliant [usually] and I get no joy in just tossing stuff. [Andy Cuffe,
a contributor here, once helped me find and repair a fried HV ceramic cap in
a broken 21 inch Sony monitor. A good experience in patience.]

I'm in Hawaii and you remind me that the excessive humidity can attack the
CRT sockets. Had the same issue a few years ago on a different device. I
had forgotten. Very rainy/humid recently. I cleaned the socket [might
have been a bit dirty] and will see what happens. For now, seems fine.

Thank you all for your advice.

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