Posts: 126
Threads: 12
Joined: Jun 2007
Not easy to fix, guess you are going to have to assign ON to a key and eat batteries and always remember to turn it off.
Best
Posts: 1,841
Threads: 54
Joined: Jul 2005
May also be a hardware defect.
If it's _not_ a halfnut CX, you could test the unit with another CPU board,
to see if the problem comes from the CPU board, the display chip,
or maybe even the connection strips...
The test unit doesn't necessarily have to be a CX. A C or CV pcb will also work.
I had some units with similar symptoms, where the problem were either the zebra stripes and/or the battery contact block.
One unit also had a 'cold' solder pin between the display pcb and the keyboard backplane.
In any case, if ou decide to open your CX, do it very carefully to not crack the screw posts,
and always make sure beeing grounded to avoid ESD.
HTH
Raymond