My mv1a board only boots to a grid test screen

[Mordheim]

I have cleaned it and changed the battery. It will only boot to the grid screen. Waht could the problem be? I also tried different carts.

 

[lithy]

Dirty Cart
Dirty Slot
Broken address line on cart slot
Broken data line on cart slot

 

[St4rgalaqtic]

Did this resolve your issues? I am asking as I have the same on one of my 1 slot boards and was advised to replace the onboard ram.

 

[Mordheim]

Did this resolve your issues? I am asking as I have the same on one of my 1 slot boards and was advised to replace the onboard ram.

In my case it was dirty board and contacts. I cleaned everything and it works.