Fliptronics and WPC-95 Games:
When activated, doesn't hold up (the flipper "flutters"). This means the hold TIP102 transistor for that flipper is bad, or the hold winding on the coil itself is broken. The hold winding on the coil is the thin wire. If it is broken, usually the wire has broken away from one of the solder lugs (one outside lug should have both the thick and thin wire attached to it). Test the coil first (see above) before replacing the transistor. Check the Fliptronics hold circuit fuse. If flipper is still fluttering, swap the right and left flipper opto boards and see if the problem changes (indicating a bad cabinet switch flipper opto).

Edit: lite svenska

Kolla först om en kabel lossnat från spolen, därefter om en lindningstråd lossnat från kontaktytan för kablarna eller om nån dragit en skruv för EOS-switchen rakt in i spolen. Spolen har två lindningar där den yttre är hold-deler.