[Atari 520 STFM C070523-001 Rev-D board bad video ghosting]

I have an Atari 520 STFM with a c070523 Rev D board that has video ghosting when using RGB video through a SCART cable and converter to HDMI video. The video is so bad that it is hard to read file names using the desktop.  The video is OK when using RF.   I have already re-caped the power supply and the caps on the main board test good using an ESR meter (with the caps in place on the board).   Has anyone run into this before?  Should I re-cap the main board even though the caps test ok? 

 

The video converter work fine with other computers.

 

 

[Atari 800 Computer no Sound]

6 hours ago, Beeblebrox said:

Do you get key clicks from the internal speaker? Assume not. Also what a/v cable are you using to connect to your display? 

 

Are the sockets for pokey checking out in terms of continuity? 

 

Audio pin on the din connector OK? 

 

Generally have you tried gently raising socketed chips out of sockets a fraction and reseting them given the decades they have been sitting in them? 

 

Pcb looking OK in terms of checks for cold solder points and bad traces /vias? 

 

I am wondering too if this is a passive component issue. 

 

 

I using the RF to the TV and I know it works fine because I have used that same power board with another main board and have sound.   I also tried a composite cable and same problem no sound.

 

Tried to trace connectivity from both the Pokey end and the power board connector end and things seem to be ok so far.  Looking at the schematic I see that the CA3086 Transistor array is part of the circuit between the Pokey and the power board connector.   I think I will try to replace that next.   The connective between the Pokey and CA3086 seems ok.  

[Atari 800 Computer no Sound]

I'm trying to get an Atari 800 working and can't get any sound out of it.  Here is what I have tried so far with parts from another working 800:

 

1.  Swapped the Power board which has the RF on it,  No sound

2.  Swapped the Pokey chip, still  No sound

3.  Swapped the CPU board, still  No sound

3.  Swapped the 10k ROM board, still  No sound

 

Does anyone have any suggestions for what I might try next?

[Atari 2600 Shifted video Problem]

Don't think it is a TV problem as another 2600 and my Commodore 64 work fine on that same TV

[Atari 2600 Shifted video Problem]

I have an Atari 2600 4 switch that has stumped me.   The picture for Combat and Pacman is shifted to the left and down (sometimes part way off the screen).   For Breakout sometimes the pictures is black and white and sometimeS color but always slowly rolls down the screen, but is more centered.    So far I have replaced the electrolytic caps, replaced the Q200 and Q201 transistors, replaced the voltage regulator, replaced the .22k caps (Green chicklets) and after that didn't work did a composite mod.   I now have a better quality composite picture but still shifted.   

 

Also have removed and cleaned all of the socketed chip contacts and even tried swapping the RIOT and CPU.   

 

Any suggestions for something else I should try.   Thanks