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Old monitor turns itself off even when disconected - help!

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).

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midix
Reply to
midix
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midix ha escrito:

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.

Reply to
b

Probably has a cracked solder joint or bad electrolytic capacitor in the power supply, should be a fairly simple repair.

Reply to
James Sweet

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