K7400 - K7401 Issues - Clicking Fly

ZEN

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Hey all, I have a 25K7401 WG here, worked great when I got it, I actually got it from another KLOV'r, Troxel, I serached back and he had similar problems, on powerup the flyback does it clicking, not humming, it is in protection mode. Troxel noted he just pulled the board and put it back in it worked for months, I bought it, worked great for me for months of intermittant use. Now clicking again.

I replaced the HOT, but it was not the issue, old HOT tested ok. I replaced the Flyback just in case, same issue. Per an old post here is the flowchart check:

HOT
D106 A,B,C
C718, C723, C724 shorted
Diode D707, D708 Shorted

Polystyrene CAPS 718, 723, 724 I could not find, anyone know where to get them, Mouser has none? Not sure how to OHM test a diode well, also I pulled the caps above, but they are non-polar, how do you check these and what would the results be? Anyone give a guy a lifeline here, I would appreciate it......
 
I dont think your problem is cap related. you have a loose connection somewere. Check for ring cracks on the horz drive transformer, the ticking sounds like your switch mode supply is in shutdown so also try soldering your regulator. good luck
 
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