Strange watches behavior on PB180c

[Aektann]

My PowerBook 180c works perfectl, except system clocks. Today it started to increase fast by each tick. It looks like the system timer increases randomly.
What should I check first?

 

[Aektann]

Update: I disassembled the book, carefully removed and cleaned all daughter boards. After this procedure system clock were reset to zeroes. Assembling my PowerBook back I powered it and finally clock are running normally again.

 

[AndyO]

I had something possibly similar with my 180 after I had removed a faulty RAM card, and replaced it with a good one. The system clock began skipping both date and time, almost every time a key was pressed. I disassembled the laptop again, removed the new card and refitted it. The problem didn't go away until the next day, when for no reason at all that I could tell, it just stopped happening.