Well I went from having not monitors to fix to having a bunch to fix.
As a part of this bunch there are 3 of these Acer AL1916W's
All monitors were either showing signs of 2 seconds to black or not lighting up at all.
When I took the first one apart I could see that there were a few badly bloated caps and there were burn marks around one of the Mosfets. I tested the burnt one and it had definitely blown. The Inverter transformer tested ok so I am going to order 2 Mosfets ( aop605 ) to replace them both and I am going to replace all of the caps. I have tested the screens CCFL's on another power supply and they appear to be ok.
I cracked open which was suffering from 2 seconds to black and everything appeared to be ok. Caps looked ok transformer tested ok and the mosfets were not burnt and they tested ok. I tested the voltage across the Mosfets and saw that when the monitor was turned on on the Inverters are given power that the voltage across the mosfets dropped right off. I thought looking at the caps in the first monitor that there is a good chance that some of these had gone but they were not showing it. I went ahead and swapped out the 2 1000 25v caps and then tested again. The monitor fired up and worked ok however it did look like it had a little flicker which went away after being on for some time. I will order all of the caps to do the whole board just incase.
I am still testing the third monitor as it doesn't seem to be showing a fault as of yet.
As a part of this bunch there are 3 of these Acer AL1916W's
All monitors were either showing signs of 2 seconds to black or not lighting up at all.
When I took the first one apart I could see that there were a few badly bloated caps and there were burn marks around one of the Mosfets. I tested the burnt one and it had definitely blown. The Inverter transformer tested ok so I am going to order 2 Mosfets ( aop605 ) to replace them both and I am going to replace all of the caps. I have tested the screens CCFL's on another power supply and they appear to be ok.
I cracked open which was suffering from 2 seconds to black and everything appeared to be ok. Caps looked ok transformer tested ok and the mosfets were not burnt and they tested ok. I tested the voltage across the Mosfets and saw that when the monitor was turned on on the Inverters are given power that the voltage across the mosfets dropped right off. I thought looking at the caps in the first monitor that there is a good chance that some of these had gone but they were not showing it. I went ahead and swapped out the 2 1000 25v caps and then tested again. The monitor fired up and worked ok however it did look like it had a little flicker which went away after being on for some time. I will order all of the caps to do the whole board just incase.
I am still testing the third monitor as it doesn't seem to be showing a fault as of yet.
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