Re: Problem Using a Commodore 1084s Monitor on a IIgs

[Polymorph <polymorph69@hotmail.com>]

On Feb 20, 4:01 am, ferd...@gmx.de wrote:
> If the things you tried didn't help at all, then it doesn't seem to be
> bad luck...
> You could try replacing C222 or just bridging with your 150µF/400V
> cap. At least in theory there cold be a fault elsewhere but this would
> be VERY difficult to find, even with an oscilloscope. Using could
> spray to cool the parts related to the horizontal output stage one at
> a time can help to locate the fault.

I'll give your suggestions a try. I've used up all of my cooling
spray, so I'll need to get some more prior to trying this.

> BTW does the problem disappear if the power is turned off for a short
> time (i.e. 1 minute or so)?

I believe it does go away when turned off for a minute or two, but
returns quicker than if the unit was cold. It does appear to be heat
related.

> Well I'd be interested in fixing these monitors because they have
> interesting defects, but this is not an option.

I'm interested in fixing *this* monitor as I bought it for my
daughter, but in future I would prefer to have a working monitor
straight away. With 2 young kids and 200+ driving per day, I don't
have much spare time up my sleeve to be worrying about these things.
Mind you, it has been educational and I am sure I have benefited from
the experience imparted from you (Ferdinand) and MJM.

Cheers,
Mike