DIYbanter - View Single Post - Fuse Blown After Transporting CRT Monitor

wrote:
It's quite possible this screw may have shorted something out within
the power supply but I think that it is unlikely. The power supply has
it's own metal cage and, when I disconnect all of the cables, can be
completely removed from the monitor. Also, its PC board is positioned
in a vertical orientation when mounted within the monitor while this is
normally standing. The screw wasn't likely touching inside there. The
scarier possibility is that it shorted out something near the flyback
transformer.

Now that I think about it, disconnecting the cables will isolate the
power supply from the rest of the monitor. This should allow me to see
if the power supply is still working properly by itself. Or at least
not blow another fuse.

What risk would I take for creating further damage to the monitor if I
were to play with this?

There are four connectors to the power supply. Five, if you include the
AC power cord. Two are for ribbon cables which are most likely for
low-voltage stuff such as logic chips. The other two are for heavier
guage wiring obviously for high-voltage stuff. Of these, one is a
two-pin connector while the other is a four-pin.

One of these have to be for the monitor on/off switch. Which of these
two? I'm not sure. My first guess would be the two-pin connector but
the on/off switch could be a double-pole switch used to completely
isolate the monitor electrically while turned off.

you need a load on the power supply . don't try to connect it without
one or it'll probably die !
replace any obviously shorted components, put it back in the set and
power up with the 60w light bulb in place of the fuse as per the FAQ.
Beyond this there's little you can do if you aren't expèrienced in
this work. May be easier to get another monitor as there are planty of
cheap used CRTS around these days for peanuts.
-B