Chupperson
-
Content Count
6 -
Joined
-
Last visited
Posts posted by Chupperson
-
-
I'm trying to bring back a dead Atari 400. Right now when you turn it on it just sends a signal that lacks sync and looks like one white line scrolling across the screen. It has the Tiny Tek 48K expansion.
It also has some really bizarre solder splatter on the underside of the CPU board, under the logic chips on the edge of the board. I can't imagine this came out of the factory this way, but I'm at a loss as to how it could have gotten there. Something overheating and causing that large solder path to leak out somehow is my best guess.
I'm going to clean it up and continue cleaning the boards, but is there anything in particular to look for while trying to get it to work?
-
I had that thought too, and I cleaned the switch with Deoxit. I just tested the switch with my multimeter to make sure everything was in order.
When I hook both drives up, having the non-detected one powered on causes it to skip trying to read from either drive. Doesn't matter if it's set to drive 1 or 2.
The non-detected drive will pass signals through the daisy chain if it's powered off however.
-
It spins up and the head moves towards the center and then back to into the photosensor.
One of the drive mechs actually has a broken photosensor, but the one in the non-detected drive works.
The computer displays "READY" more quickly when the drive is on.
Here's a video:
-
I have two 1050 drives, one of them boots when I turn on my 800XL, but one of them doesn't. Typing DOS with the non-detected drive just takes me to the test menu. The drive select switches are both set left on each drive (I'm trying each separately). When I swap the drive mech from the non-detected one to the detected one, it reads the disk, so I know it's a board problem. The drive spins up and everything when I turn it on but that's as far as it goes.
What should I be looking for? The SIO connectors don't seem to have cold solder joints.
Has one of the chips on the board gone bad? Any help would be appreciated.
-
I have a ColecoVision with some scrambled but recognizable graphics. I've done the +5V RAM mod; I've cleaned the power switch; I've tested with a known working power supply (and the one I was using for it tests good anyway).
When a game starts up, the sprites have the right colors and everything but they're missing pieces or they pull up the wrong part of the sprite.
What other problems could be causing these results?
Like us on Facebook
Follow us on Twitter
AtariAge on Instagram
Watch us on YouTube
Chat on Discord
Atari 1050 disk drive not detected?
in Atari 8-Bit Computers
Posted
Thanks to 1050, my disk drive is now working! I got some replacement 3086 chips and installed one in the bad drive and it booted a disk on the first try!
Now I need to figure out the problem with my other drive. It had had one or more leaky capacitors which have damaged the board. I replaced them all but some of the solder holes are corroded and may not be conducting properly.
I also had a problem with a decomposing(?) disk that stuck to the drive head and actually stopped the drive from spinning. It's looking like I may need to replace the diodes on the board as well since the bad caps may have blown something in an attempt to keep the drive turning, I'm guessing. Anything to look out for? Thanks!