I have 2 dash lights that wont illuminate. Took dash pad off to replace burned out bulbs ( had about 6 of em not burning). Replaced 1 turn signal bulb (now works), replaced 5 dash bulbs -- 3 worked, 2 didnt!! took the 2 that didnt work back out and bench-tested the bulbs - they work fine. Installed again - still dont work. put bulbs in different sockets and tried again! Still dont work. Could I have breaks in the printed circuit? I guess i should tell you that one that dont work is on the left side of the speedo and the other is on the far right side! How do i test to tell if printed circuit is interrupted? and if so, can it be repaired? or is my only salvation to purchase a whole new circuit board?? anyone able to help?

Make sure the bulb sockets (and where they contact the board) are clean. You can look at the printed circuit and tell if it is open anywhere. Perhaps it needs to be cleaned at those contact points as well. I don't know how you can fix a printed circuit. If it can be done, someone on here will know!

I've repaired a few small problems using the material for a rear window defogger repair. After doing it a few times I found it more practical and safer to buy a new PCB.

If you have cracked traces, you can carefully scrape the traces with a knife to remove all coatings and get to bare copper. Then solder small jumper wires to the traces using a lower wattage soldering iron. Put too much heat into it and the traces can lift off of the board.

This technique is used frequently in the business to correct errors on prototype PC boards with the addition that the traces are not cracked, they are cut.

Thanks to all for tips -
its really hard to see if traces are interrupted with the dash still in the car, but i will try a little cleaning -- i thought changing to different sockets would do the trick, but obviously it didnt.
Thanks

Another thing to check is the screws that provide ground for several printed circuit traces. Look around the perimeter of the printed circuit and you should see several screws the make contact with the printed circuit and go through the metal housing. Make sure they are clean and tight, don't overtighten as they can strip out.