ranger81

Hello, Sorry for the long delay. As recommended I created a DIN->USB adapter cable and use a USB phone charger as a new power supply in the meantime. Since a few weeks, the issue is gone. I did nothing else to the Atari, cant tell what was wrong but now the cold boot does work as expected. If the issues reoccurs I'll update the thread accordingly. So far, thanks for your suggestions.

Hello everyone, I have an Atari 800XL and an original power supply. If the Atari was switched off for a longer time (more than about 20 sec.) the Atari has the problem that it doesn't boot to the Basic "READY" but only a blue screen and the cursor in the upper left corner. The usual "mumbling" at startup is faster and louder than usual. In the end, the system seems to hang up. If I press the reset button or switch it off and on again quickly (probably do a warm start), it initializes correctly (mumbling sounds normal) and then games and the self-test run without errors. I made a short video about this, so you can watch it yourself: My first assumption as a newbie would be to look at the power supply and/or capacitors, which I should maybe look at or change. Would you agree with that or do you know the error pattern in other contexts? Thanks a lot and greetings, Tobi

Hi Voxel, I did read the mentioned topic, however the Jr. does not have the mentioned caps, voltage regulator was already changed by me without any effect. Also the 500k color adjustment pot was replaced with a new one. My picture looks way more "snowy" than the picture of the other thread. I have 95% only static and 5% static that is different if I turn off the Atari. I would be probably happy with the "light snow" on the other thread

Hi all, I got a used Atari 2600 Jr. and it is having serious issues with the video output. I have tuned my television to the proper channel (checked with another Atari 2600 Jr), but I can only see „snow“. The „snow“ slightly changes, when I adjust the color adjustment potentiometer and also if I switch the „Channel“ switch. Therefore I assume some kind of output is produced. Temporarily I installed a Composite mod and I got a video signal (colors were off even though I tried to adjust the potentiometer, but at least I got a signal). Also tried to adjust the two variable inductors on the RF modulator. The „snow“ changes when turning them, but never get a real video output. Why not just keep the Composite you may ask? Well, I would like to use the Atari with an old television with only RF input, therefore I need to fix the RF signal circuit. I have access to some electrical tools (oscilloscope, soldering stuff, multimeter, …) but I would need some advice, where to start analysing the issue. Are similar issues known or do you have advice what to check and how to proceed? Thank you very much!