midix ha escrito:

I have an old EIZO 14'' FLEXSCAN 9060S monitor and I need it to be
working at least for a month. At first it worked fine although was
second hand already. But then it started switching itself off after 10
minutes or so. I decided that I have nothing to lose and started
adjusting SUB H. SIZE inside of it (because I noticed that the iamge on
the screen has black sides, it is not wide enough). And after that it
worked fine for 2 months. Then I bought a new one and put my EIZO away
in a bit cool place (but not wet). After 2 years I need it again but
now it turns itself off after 4 seconds or so no matter if I connect
VGA to PC or no. With SUB H. SIZE I can only change the time to 3-5
seconds and nothing else. Other regulators do not help. What could have
gone wrong, any ideas?
It turns completely off, the screen goes black and power led turns off
and this little noise inside of it (you now, all CRTs have that noise)
turns off too. When I disconnect it from the power and count to at
least 5 then turn on, it works again for 4 seconds.
I have an experience with repairing radios and cassette recorders but I
am a bit afraid of monitors (because of a high voltage) although I could
replace any component if only I knew which one is faulty.
Thanks (at least for reading this nightmare).


--
midix

this sounds like a power supply problem or simply bad connections, say,
in the horizontal section. you have treated the symptoms not the cause
by adjusting that pot.
poor width often indicates low power supply lines, maybe bad main
filter cap, or something shorted on one of the flyback/LOPTX outputs.
start by resoldering anything even slightly suspicious then change ALL
the caps in the psu especially the big 400v one.
if the unit has been left unplugged for a day or two you should have
nothing to worry about., just dont touch the fat red wire to the tube.
post back after you've checked this , and soldering, and we'll take it
from there.
b.