Like the title says. Acquired an Atari 800. After cleaning it up, I plugged it into an old monitor - and all I get it s a blue screen. No Memo Pad. If I press the keys, nothing appears on the screen. The System Reset key (top right) seems to work as the screen flashes when I press it.
I have a few game cartridges (no BASIC) and when I turn on the 800 with one plugged in, it works fine (and the Options and Start keys work fine).
I also have an Atari 400 - and that seems to boot up to Memo Pad just fine.
Any ideas what's wrong with the 800? I'm not too familar with these Ataris.
thanks!
Chris