I could use some help troubleshooting this. When I power the CV on without the cart, half of the time I get error message telling me to turn off the system before inserting a cart or expansion module. Other half of the time I get solid black screen. When I power on with the SD cart, usually I get the menu but sometimes I can't get to SGM test ROM as it either leads to black screen or "No SGM detected". I noticed the red power LED were flickering or dim when I get solid black screen.
Once I got something different:
I can't tell if this can be caused by bad expansion slot or something else. I don't have any working 2600 module to test with.
PS instruction book mentions 90 days from date of purchase like old time but considering I bought this back in March and just got it a few days ago, I'd assume it meant 90 days from date of shipment in this recently completed SGM wave.