Hello all, This is my first post, so bear with me.

I got a Model #: M0001 Mac 128k from my grandparent's basement. When I turn it on, It displays the "Sad Mac" icon and code 048010 there is a patterned dotted line under the code that appears to be changing patterns every half second or so.

I have no clue on the status of the battery, it's there though. I have not opened the unit.

So what's the diagnosis, is there any hope?