[Coco] FREE Services For Members Of The CoCoList at Malted Media

[Gene Heskett]

On Tuesday 17 April 2007, Jim Hickle wrote:
>I have a Performance Peripheral RAM board but I'm not sure if there
>is something wrong with it or the coco3.  The screen is filled with random
> characters. I pulled the 512k board and plugged in two 64k chips and the
> computer works, but there is a dark horizontal line that rolls vertically. 
> But I don't know if it would need the capacitors that were clipped for the
> memory upgrade would need replaced or maybe the power supply is bad.  If
> nobody offers a good 512k board, I can try testing this one in my working
> Coco3.  I' ve not put much effort into reviving it since I have a working
> 512k machine and it would be easier to buy a new board from Cloud-9.
>
That description would seem to match a bad power supply filter, probably that 
really big electrolytic not too far from the power transistor and heat sink 
off the left edge of the board.

-- 
Cheers, Gene
"There are four boxes to be used in defense of liberty:
 soap, ballot, jury, and ammo. Please use in that order."
-Ed Howdershelt (Author)
When the ax entered the forest, the trees said, "The handle is one of us!"
		-- Turkish proverb