Sony PVM-2030 video monitor won't switch to RGB

[Jax184]

I've got a matched pair of Sony PVM-2030s here, and for the life of me I
can't get either of them to display an RGB signal.

A little background:
On the back of these things is a 25 pin connector labeled COMPUTER which
will accept an RGB signal. The manual has pinouts and lots of people make
adapters to hook their game consoles up. I'm currently trying to use an old
Sega Dreamcast with just such an adapter. The adapter and the dreamcast came
with the monitors and I saw it working when I bought them, but when I got it
home I found that was no longer the case. The guy said the RGB port was dead
on one and fine on the other, so I guess whatever went in the first one
decided to go in the second while it was being transported.

So I've opened them up and poked around and found nothing visibly wrong.
Nothing disconnected, no cracked solder joints, etc. I suspect something has
gone wrong in the circuit which switches between the inputs, but I'm in a
little over my head when it comes to tracking it down.

Could anyone suggest how I might figure this one out? Does anyone have a
service manual for this beast?

 

[bob urz]

I've got a matched pair of Sony PVM-2030s here, and for the life of me I
can't get either of them to display an RGB signal.

A little background:
On the back of these things is a 25 pin connector labeled COMPUTER which
will accept an RGB signal. The manual has pinouts and lots of people make
adapters to hook their game consoles up. I'm currently trying to use an old
Sega Dreamcast with just such an adapter. The adapter and the dreamcast came
with the monitors and I saw it working when I bought them, but when I got it
home I found that was no longer the case. The guy said the RGB port was dead
on one and fine on the other, so I guess whatever went in the first one
decided to go in the second while it was being transported.

So I've opened them up and poked around and found nothing visibly wrong.
Nothing disconnected, no cracked solder joints, etc. I suspect something has
gone wrong in the circuit which switches between the inputs, but I'm in a
little over my head when it comes to tracking it down.

Could anyone suggest how I might figure this one out? Does anyone have a
service manual for this beast?

http://www.docs.sony.com/release/PVM2030.pdf

bob

 

[Jax184]

That's just the users manual, which I already have.
I made another cable based on the pinout in it just in case there was
something wrong with the other one, and it's still doing the same thing.