28W 2D fluorescent tube starter, bulb or ballast problem

s before starting, a few weeks (maybe months) ago. It finally stopped worki ng altogether the other day.

the assumption that it was shot. I ordered a new one, fitted it, but the la mp was still dead. I then swapped the starter (will any universal one withi n the right Wattage range suffice?), but still no joy. I then checked all w iring connections for continuity- all fine.

how to check it. It looks to be in good shape (no leaks or burnt/melted bit s). I checked the resistance across the two terminals and found it to be ar ound 65 Ohms- does this tell us anything other than that there is electrica l continuity between the terminals? Is there a definitive test to ascertain whether the ballast is good or broken?

Most likely a bad starter. Otherwise you'll need to troubleshoot it properl y.

NT

If it's an iron ballast, then it's just a choke - so end to end low resistance (65 ohms seems in the right sort of magnitude) and high (infinite) resistance between case and coil.

If it's electronic, then no easy way to be sure.

ods before starting, a few weeks (maybe months) ago. It finally stopped wor king altogether the other day.

e the assumption that it was shot. I ordered a new one, fitted it, but the lamp was still dead. I then swapped the starter (will any universal one wit hin the right Wattage range suffice?), but still no joy. I then checked all wiring connections for continuity- all fine.

e how to check it. It looks to be in good shape (no leaks or burnt/melted b its).. I checked the resistance across the two terminals and found it to be around 65 Ohms- does this tell us anything other than that there is electr ical continuity between the terminals? Is there a definitive test to ascert ain whether the ballast is good or broken?

other than connect a known good tube. But with a starter it will be an iron lump.

NT