problem in sun GDM 20E20 Monitor

i hv two Sun GDM 20E20 . some time it got the problem when it was
running. suddenly red color got off. now the only red and green color
comes in screen . in second monitor there is only red color .plz
help me wht may be the problem??


i hv checked for cold solder but i hvn' found any cold solder .
i gave my monitor for repairing in my city but he couldn't found exact
problem in it .
he told me there is problem in color processing IC. but i don't know
which IC processes the color.

I think tube is ok bcoz i hv changed the board which connected to back
of tube.
when i interchange the board the problem is also interchanged.

Can any buddy tell me which IC may be faulty

thanx in advance every buddy

 

[JANA]

It may not be the chip. You should use a scope and follow the video process
path to determine where the failure actually is.

In most of the Sony monitors, there is a main driver IC on the video board
that is on the CRT socket. There are also other devices that can cause this
type of fault.

--

JANA
_____


<ankurjasani@gmail.com> wrote in message
news:1193341713.826996.247880@k35g2000prh.googlegroups.com...
i hv two Sun GDM 20E20 . some time it got the problem when it was
running. suddenly red color got off. now the only red and green color
comes in screen . in second monitor there is only red color .plz
help me wht may be the problem??


i hv checked for cold solder but i hvn' found any cold solder .
i gave my monitor for repairing in my city but he couldn't found exact
problem in it .
he told me there is problem in color processing IC. but i don't know
which IC processes the color.

I think tube is ok bcoz i hv changed the board which connected to back
of tube.
when i interchange the board the problem is also interchanged.

Can any buddy tell me which IC may be faulty

thanx in advance every buddy