My Lw3 was working fine until a couple of days ago. Over night it looses it memory? I changed the battery holder as a matter of course...no difference. I have sited it at my local so any high scores are being lost. I see there are a couple of diodes ( D25 & D23) in the firing line. I will be going past a electronic part shop before i Get the the machine and would like to get hold of a few . Cannot find a parts list anywhere . If some one could offer assistance , diode value,parts list or any other clues I would be really grateful. Cheers