Concept 2 PM2 Console Repair - Give Up

Sometime in the past the batteries leaked in the PM2 display console
https://thomsoneu.blogspot.com/2016/08/concept2-pm2-console-repair.html
I do not recall whether they were my batteries or whether this had happened pre purchase.

Anyway, now the unit is dead.

It's been sitting unused at work for a couple of years with no batteries in it.

With the Covid-19 isolation going on, I figured I would get it out and take it home.  Did that and put some batteries in and no display. 

Initially pulled it apart and cleaned up the battery terminals and the display came on but buttons did not work.  To get them to work, I had to clean both sides of the board with isopropyl alcohol.  There was a think coating of something all over the gold fingers.  I can only assume battery acid fumes.

That seemed to get it working.

Took it home and put it on the machine but got illogical results.  Some display segments never came on.

Back to work.  Pulled it apart again.
Buzzed out tracks and inspected under the microscope.
Lots of tracks eaten away and lots of open circuit vias.  This would need a through wire in every via and thats going to be time consuming.  What if there is via under a chip.  So decided to pension it off.