Patches and discussion for Ensoniq VFX family

Hi !
I have a VFX-SD that havent been used for 3 years. Now it always works 
well for 7-10 minutes - then some keys doesnt work at all whereas 
other play "doublenotes"(=two notes at a time", after a few more 
minutes it freezes completly  - reinitialising or restarting doesnt 
work, the battery though old is tested and seems to work properly. 
I'll have two wait for two hours before I can turn it on for 10 more 
minutes - hefty limitations on a mans creativity...  

So I guess it is the connection of the two boards within the keyboard 
itself (that I've read about on this group and internet sites)that 
isnt working. I have removed all the keys (cleaned and dusted 
everything) but I havent dismantled the two boards from the keyboard  
- Now, How should the connection between the two boards within the 
keyboard be made. (I'm a technical imbecile so please forgive me if 
I'm being really stupid...) Since I havent removed the boards from the 
keyboard I just see the back of them and as a lay man my description 
of how they are connected on the back goes as follows: "Currently 
there are 12 small "elevations" on the side of the boards. they are 
connected by 8 thin cupper-threads of approx 1cm length, four 
"elevations" thus have no connection." So what should I do:

1) clean these 8 connections and hope for the best ?
2) add some wires (to some of the remaining 4 elevations, what type of 
wire should I use) ?
3) remove the boards and clean their front side (I do not believe I'm 
capable of that..)
4) do something else with the VFX-SD
5) step out of nostalgia and buy myself newer gear (I'd hate that 
since I love my VFX-SD though our relationsship currently is going 
through a rather difficult phase....

PS Can I test the synth without all the keys or do I have to put them 
all back to place before I turn it on  

Kindest regards
/svenburen