Hi, I have this year old or so monitor and there is absolutely no picture. On connecting the monitor to computer and turning it on .. the status LED changes from green to yellow. I tried to measure the 5V, 6.3V and 12V power nodes to the heating element area and none of them seemed to have any voltage. I also tried looking for any bad capacitors or bad solders but couldn't find any. Any suggestions ?
Thanks, InduP
I assume this is a CRT monitor, since you mention heater voltages. It sounds like the power supply is shuting down because of an over-current situation. I would check for a short circuit in the secondary of the power supply (diodes). Also check the horizontal output transistor and all large diodes and transistors on the main board, especially in the flyback transformer area. Hope this helps... John
Make the "lamp" test, remove the HOT, then take two 60W lamps in series and connect one wire to collector pad and the other to the emitter pad, if the two lamps power on and the tension is correct, then it's a problem on the horizontal deflection.
I.
I think I made a mistake in my previous test .. the voltages do show up on
5V, 6.3V and 12V points although the voltages were a bit less that each specified value. One thing though the heater filament doesn't lok incadscent at all .. I mean isn't it supposed to glow a bit.Thanks
Okay I found a bad solder near the flyback transformer .. and now I hear a continuous click-click sound around a different transformer named "HIPOT" !!
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