[Coco] F board video issues

[Josh Harper]

im using a tv Samsung 32" flat panel it work fine for other cocos ive tried  
the ok prompt only  even when first turned on sonetimes
thanks 
       From: Arthur Flexser <flexser at fiu.edu>
 To: CoCoList for Color Computer Enthusiasts <coco at maltedmedia.com> 
 Sent: Monday, April 20, 2015 2:11 AM
 Subject: Re: [Coco] F board video issues
   
I have never heard of the problem of parts of letters being missing.  The
fact that this same weird problem occurs with 2 different CoCos of yours,
plus the fact that the 3rd CoCo also doesn't display properly, suggests
that maybe there is something funny with the monitor or TV you are using.
Do you have another display device you can try?  If it is a TV, does the TV
picture look okay?

(Booting to an OK prompt only just means you didn't leave it off long
enough for memory contents--in particular, the byte that is checked to
determine whether a warm or cold start is called for--to fade away from the
previous power on.  Some CoCos may require 30 seconds or so occasionally.)

Art



On Mon, Apr 20, 2015 at 2:55 AM, Josh Harper via Coco <coco at maltedmedia.com>
wrote:

>  I have 3 coco 1 F boards with video issues
> 2 of them show up with the normal boot screen  but the writing  is missing
> parts of the letters almost looks faded  example there is part of  a Y  or
> half a O and so on
> the 3rd coco 1 will boot to a normal boot screen except  instead of green
> its redish
> and some times it will just boot to a ok prompt only,,with the same redish
> screen
> also I have a hjl keyboard that when u press ? it gives you a = ? instead
> theres a few other keys that do this,its all so using a keyboard adapter,,
> I tried a different keyboard and it worked fine
> does anyone how I might fix these problems
> thanks for ur help
>
>
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