A visitor from Sweden!

[ChickenMan]

Getting the solid block top left corner is what you get when there is no floppy attached. So that indicates the unit is working and trying to boot a disk. If you hold down the M key and then use the Reset key it should jump into the inbuilt Monitor. Type in E e000 and that will Examine at address E000h which is where the boot rom resides. All that interference I doubt is coming from the bee.