"Lightning streaks" on Acer monitor

[Doc]

Archived from groups: comp.sys.ibm.pc.hardware.video,sci.electronics.repair (More info?)

I have an Acer AcerView 34T uvga monitor I got maybe 5 years ago at Best
Buy. It's worked fine until the last week or so. It's developed what look
like "lightning" streaks vertically down on portion of the screen, as well
as a slight fluttering of the image. A light rap on the case seems to clear
it up temporarily.

Anyone knows what causes this and if it's even going to be worth trying to
fix?

Thanks!

 

[Guest]

Archived from groups: comp.sys.ibm.pc.hardware.video,sci.electronics.repair (More info?)

"Doc" <docsavage20@REMOVEhotmail.com> wrote in message news:<RwIuc.32087$zO3.3577@newsread2.news.atl.earthlink.net>...
> I have an Acer AcerView 34T uvga monitor I got maybe 5 years ago at Best
> Buy. It's worked fine until the last week or so. It's developed what look
> like "lightning" streaks vertically down on portion of the screen, as well
> as a slight fluttering of the image. A light rap on the case seems to clear
> it up temporarily.
>
> Anyone knows what causes this and if it's even going to be worth trying to
> fix?
>
> Thanks!

A small hammer on a long string to where you sit to view is one
solution.

Seriously, you need to isolate where a "hit" has the most effect, on
the pwb, on the cables, on the CRT itself, etc. You'll need to take
the back off the monitor. Be sure to identify the High-voltage lead
to the CRT and do not touch that, The insulation should be ok, but
you dont't want to run thru every 4-letter word in your vocabulary
when you find out there is some leakeage.

H. R. (Bob) Hofmann

 

[Guest]

Archived from groups: comp.sys.ibm.pc.hardware.video,sci.electronics.repair (More info?)

>
> Seriously, you need to isolate where a "hit" has the most effect, on
> the pwb, on the cables, on the CRT itself, etc. You'll need to take
> the back off the monitor. Be sure to identify the High-voltage lead
> to the CRT and do not touch that, The insulation should be ok, but
> you dont't want to run thru every 4-letter word in your vocabulary
> when you find out there is some leakeage.

One of the most useful tools in my computer monitor troubleshooting
kit is a long thin wooden dowel, about 12 inches long. It is a safe
way of pushing, probing, and prodding intermittant connections, and
helping to isolate where they are. Start with gentle pushes around
things like connectors, and PCB-mounted items that look "heavy", such
as transformers and big capacitors.

 

[b]

Archived from groups: comp.sys.ibm.pc.hardware.video,sci.electronics.repair (More info?)

Not familiar with this model but have seen and fixed similar faults on
TVs.
You need to check the solder connections to the yoke, (if you aren't
familiar with this sort of thing that's where the coils of copper wire
around the tube are.)
Resolder the cables where they meet the windings and also check the
pcb solder connections underneacth where the connector is.
DONT keep using the monitor in that condition, as the intermittent
contact will stress the output stage!! very costly to put right.-
Ben

"Doc" <wrote in message > I have an Acer AcerView 34T uvga monitor (...)It's developed what look
> like "lightning" streaks vertically down on portion of the screen, as well
> as a slight fluttering of the image. A light rap on the case seems to clear
> it up temporarily.
>