Sony Monitor GDMFW-900 Noise / Screen Dropout
 

Hi All:

I have recently resurrected a Sony 24" GDMFW-900 computer monitor from the
trash. It was in bad shape with regards to being full of dirt & debris ( &
spilled beer ). It has been working fine for the most part over the last
month or so. It has one anomalie that concerns me. Every once in a while,
I will hear a light 'crack' noise. At that same instant, the picture
collapses for just a brief second. It comes right back on and continues
working as if nothing has happened. I've only wittnessed this about 6 times
since I got the monitor running. But it happened twice in one day recently.
As such, I'm sure that whatever is happening is going to get worse. One
time only I noticed that there were a few errant single pixel high
horizontal lines that dashed around the screen immediately before it cracked
/ collapsed. Again, it was fine afterwards.

Any thoughts on what's going on? Anything preventive that can be done to
save the set before it blows up a bunch 'o parts? If I took this into a
shop, it might have to run continuously for a week before the problem would
show. And then it might only happen once for another week or two. I'd like
to nip this in the bud if possible. Thanks for any thoughts & suggestions.

Bob
bobkos at earthlink dot net

Sony Monitor GDMFW-900 Noise / Screen Dropout
 

On Sat, 18 Mar 2006 20:52:14 GMT, "Bob Kos"
wrote:

Hi All:

I have recently resurrected a Sony 24" GDMFW-900 computer monitor from the
trash. It was in bad shape with regards to being full of dirt & debris ( &
spilled beer ). It has been working fine for the most part over the last
month or so. It has one anomalie that concerns me. Every once in a while,
I will hear a light 'crack' noise. At that same instant, the picture
collapses for just a brief second. It comes right back on and continues
working as if nothing has happened. I've only wittnessed this about 6 times
since I got the monitor running. But it happened twice in one day recently.
As such, I'm sure that whatever is happening is going to get worse. One
time only I noticed that there were a few errant single pixel high
horizontal lines that dashed around the screen immediately before it cracked
/ collapsed. Again, it was fine afterwards.

Any thoughts on what's going on? Anything preventive that can be done to
save the set before it blows up a bunch 'o parts? If I took this into a
shop, it might have to run continuously for a week before the problem would
show. And then it might only happen once for another week or two. I'd like
to nip this in the bud if possible. Thanks for any thoughts & suggestions.

Bob
bobkos at earthlink dot net



It sounds like the CRT is arcing. It could be inside the CRT, or it
could be from the anode connector, or CRT socket. Since there was a
lot of dirt in it, this is particularly likely. Did you disconnect
the anode connector from the CRT? Any dirt under this can cause
arcing. Make sure the CRT socket is clean and clean under the anode
connector and the CRT near the anode connection with alcohol.

Andy Cuffe

Sony Monitor GDMFW-900 Noise / Screen Dropout
 

Hi Andy:

Thanks for the reply. I did have the anode connection off when I went
through this monitor. I don't recall the tube socket or anode connection
being particularly dirty. I also don't specifically recall having cleaned
anything up in that area. I will take it apart and have a look-see. Thank
you for your input. It is greatly appreciated.


"Andy Cuffe" wrote in message
...

It sounds like the CRT is arcing. It could be inside the CRT, or it
could be from the anode connector, or CRT socket. Since there was a
lot of dirt in it, this is particularly likely. Did you disconnect
the anode connector from the CRT? Any dirt under this can cause
arcing. Make sure the CRT socket is clean and clean under the anode
connector and the CRT near the anode connection with alcohol.

Andy Cuffe