ComputerBooter
New member
Whats up guys, just purchased this road blasters cab and it basically turns on with garbage all over the screen.
When I have the game PCB plugged in, the scrambled mess is even worse. At this point all I am trying to do is actually get the Atari System 1 board to power on properly. Without the game cartridge in, just garbage shows up on the screen.
I have tested 5v power and that seems good.
I have an oscilloscope (just got it so not to versed on how to use it properly, but am a quick learner!)
The bottom LED on the mainboard lights up, but the top LED does not do anything. I have grounded WDIS after poweron and that changes nothing.
Where in the heck do I go next?!
I have connected the scope to pin 15 of CPU and I see activity, but cannot verify that it is correct since I dont know how to use the scope properly. I have tried to view the reset line (pin 18) but get the same result as pin 15.
Here are a few pics
The second picture is strange because the 2 leads were cut behind the PCB and then fixed like this (but they are actually reversed) (when I swapped them it made the garbage on the screen scroll up continuously so I put it back to how I found it and the scrolling stopped)
Thanks in advance for any help, would love to get this bad boy up and running to share with our customers (we are a local repair/retro shop!)
When I have the game PCB plugged in, the scrambled mess is even worse. At this point all I am trying to do is actually get the Atari System 1 board to power on properly. Without the game cartridge in, just garbage shows up on the screen.
I have tested 5v power and that seems good.
I have an oscilloscope (just got it so not to versed on how to use it properly, but am a quick learner!)
The bottom LED on the mainboard lights up, but the top LED does not do anything. I have grounded WDIS after poweron and that changes nothing.
Where in the heck do I go next?!
I have connected the scope to pin 15 of CPU and I see activity, but cannot verify that it is correct since I dont know how to use the scope properly. I have tried to view the reset line (pin 18) but get the same result as pin 15.
Here are a few pics
The second picture is strange because the 2 leads were cut behind the PCB and then fixed like this (but they are actually reversed) (when I swapped them it made the garbage on the screen scroll up continuously so I put it back to how I found it and the scrolling stopped)
Thanks in advance for any help, would love to get this bad boy up and running to share with our customers (we are a local repair/retro shop!)