i'm sorry to hear that, it's the first time something like this happened
can you try removing rapidus from your 130xe to see whether it's the atari or rapidus?
what power supply are you using?
Update: I tried for about an hours and the 130 seemed dead. I unplugged the power, tried different power supplies. Nothing worked. I set the 130 aside for about an hour and tired it again and it booted just fine. Strange. Everything worked (no AVG cart installed). The 130 worked perfectly. I tried various carts ect. No issues.
So I thought I’d try an experiment. What could go wrong?
I plugged the AVG Cart back (label up) into the 130 and the same thing happened. Brown screen etc even after removing the cart and cold booting. I waited for 5 min and the 130 booted again. I tired switching the CPU mode on the Rapidus with different combinations of the Ultimate. Nothing worked.
The cart works great on my 800XL with an Ultimate installed.
Good news, my Atari 130 lives and the Cart is awesome!
Bad news, the AVG Cart seems to be incompatible with the Rapidus and/or Ultimate combination.