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POWER UP - ALL GOOD , ADD BALL TO OUTHOLE GROUND ROW SHORT ROW 5 . MOVE BALL TO TROUGH , GROUND ROW SHORT ROW 6 . 2 BALLS IN TROUGH , GROUND ROW SHORT ROW 6 &7 . BALLS IN TROUGH , GROUND ROW SHORT 6 & 7 & 8 ??????????????? SO IT APPEARS TO BE IN THAT AREA . HOW DO I FIGURE OUT WHERE? DIODE OR SWITCH? ANY HELP MUCH APPRECIATED excuse capitals . too much to write all again, im not yelling (nearly crying , but not yelling) 
Quoted from Atari_Daze:Have you physically examined the switches associated with these?
Do you have a manual?
Do you have and know how to use a DMM?
https://www.ipdb.org/files/861/Williams_1992_Fish_Tales_English_Manual.pdf</blockquo they look ok, got a manual , got a multimeter , don't really know how to test things , although the diodes test flowing one way, so they appear ok . do I have to disconnect them to test . I didn't . all switches on those rows look ok-not earthed
Quoted from Atari_Daze:http://www.pinwiki.com/wiki/index.php?title=Beginner%27s_Notes
http://www.pinwiki.com/wiki/index.php?title=Williams_System_3_-_7
http://www.pinrepair.com/begin/index.htm
These resources should help you get started along with your topic here.
nothing there means anything to me how do you check switches
Quoted from LTG:For a start. Tests - Switch Edge, hit a switch. See if it works and the correct switch reports on the DMD.
LTG : )
thanks everyone . turned out someone had put earth strap under 1/2 of the tilt switch . explains why they had green wire to tilt switch disconnected . I put it back on , didn't know better about earth strap. looked at my cftbl and hello no earth strap to tilt . removed earth STRAP , ALL GOOD ON SWITCH FRONT . NOW THE LAMPS . single lamp test more than 1 light lights . any help with it would be nice
IMG_0868 (resized).JPGQuoted from RCA1:Are the lights that should not be lit in the same row or column in the lamp matrix as the one that should?
5 hrs later-solved . they had changed the order of wires into big light board under p/f . I had to follow traces to pins , from lights . this told me what wires went where . sorted that all is good on lamp front , now to change 2 x lane guide switches and everything is a1.glad I don't have to pay myself . i'd be broke working at my speed switches and color led dmd morrow
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Raleigh