You guys are missing the info!!

We are missing info that YOU must provide. If clock and data are clean,
what do you have at the collector of the horizonal DRIVER ?. Do you
have a flatline at B+, a normal waveform, or that =BC sine wave you get
when the secondary is open ?

You should be watching the scope as you try to turn it on, to determine
if it's going into immediate shutdown. This can happen silently, and
very fast.

This business is not succeeded in by remembering what it was last time.
You succeed in this business by figuring it out. Then of course you
remember it, but I simply can't be your eyes and ears, and hand to
guide the DVM or scope probe.

If you're not into scopes, the SDA and SCL lines on the EPROM should be
a few tenths under Vcc, and equal. If the discepancy is more then 0.3V
and unequal you most likely have a bad EPROM. If changed and the
symptom persists, one of the chips on the bus has a bad I2C interface.

You might just have a bad fly, the HOT waveform will tell you that.

You might also give second thought before the next time that you say
that "WE" have missed something. Last I checked now, four respodents to
your post are quite skilled (I guess that includes me in this case). I
don't really know Kip, but in this case he made a valid point, as far
as David, Dan and John go, they are definitely the kind of techs that
each successful shop needs at least one of to thrive. (or even survive)

FWIW, you need a scope and to know how to use it, then you wouldn't
have even asked the question. One positive thing, you only need about a
20Mhz scope for most TV work, they are cheap.

Don't sweat it, live and learn, learn and live.

JURB