Hi All,
I bought this monitor from a used site from someone who claimed this was broken with no power at all after a power outage.
When I got home it worked fine. I used it daily for a while. However after every power outage it would die again. No power at all until it is left unplugged overnight. Then it will work fine.
This was fine with me until I decided to label the breakers in my house and ended up flipping that breaker a few times with the monitor plugged in.
After that day I have been unable to get the display to come back on. Even after leaving it unplugged for more than 24hr.
Currently when the power cord is plugged in the light will be green for a few seconds before turning orange for a minute or so before switching back to green and staying there indefinitely. pushing the power button at any time does nothing to change this light sequence.
https://www.badcaps.net/forum/showthread.php?t=18189
I used the info and schematic on this thread to find that everything on the power supply seemed fine and that the mainboard wasn't providing a signal through pin 9 on CN701.
power supply readings:
IC701 VCC: 14.7V
C606: 15.78V
C605:156V
C611:14.7V
C622:26.1V
When testing PFC chip
IC651 VCC: 500mv and
0V pn 9
to troubleshoot I unplugged the cable from main and applied 3V to pin9 and IC651 VCC went to the proper range. 14V i think? C605 also was 400V.
Does anyone have a suggestion about what to test next?
Thanks in advance for your help
I bought this monitor from a used site from someone who claimed this was broken with no power at all after a power outage.
When I got home it worked fine. I used it daily for a while. However after every power outage it would die again. No power at all until it is left unplugged overnight. Then it will work fine.
This was fine with me until I decided to label the breakers in my house and ended up flipping that breaker a few times with the monitor plugged in.
After that day I have been unable to get the display to come back on. Even after leaving it unplugged for more than 24hr.
Currently when the power cord is plugged in the light will be green for a few seconds before turning orange for a minute or so before switching back to green and staying there indefinitely. pushing the power button at any time does nothing to change this light sequence.
https://www.badcaps.net/forum/showthread.php?t=18189
I used the info and schematic on this thread to find that everything on the power supply seemed fine and that the mainboard wasn't providing a signal through pin 9 on CN701.
power supply readings:
IC701 VCC: 14.7V
C606: 15.78V
C605:156V
C611:14.7V
C622:26.1V
When testing PFC chip
IC651 VCC: 500mv and
0V pn 9
to troubleshoot I unplugged the cable from main and applied 3V to pin9 and IC651 VCC went to the proper range. 14V i think? C605 also was 400V.
Does anyone have a suggestion about what to test next?
Thanks in advance for your help
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