Had 8 of these to fix with my most recent batch.
When I cracked open the first one for testing it was lighting up one CCFL and only half lighting up the other one. When I stripped it down and took out the power board I could see that the were some burn marks on the transformer.
On testing the transformer the burnt side was shorted. I then tried another monitor and this was also suffering from a blown transformer. As you can see there was a bit of a theme going on with them.
It turns out 4 of them had completely blow transformers and one of them is making a noise so it is definitely on its way out.
I managed to get the others working by swapping parts from the boards with the faulty transformers. 1 of them had a fine transformer but a blown mosfet. One had a faulty logic board and believe it or not one of of them someone had disconnected the front panel of buttons which meant it wouldn't turn on. Once reconnected it powered on and worked fine.
I have got a deal on 10 transformers for £27 from china so I am sure I can get the others up and running when the transformers arrive. Then I can work on the not so easy faults and see if I can get them all up and running.
I will add a few more pics of the burnt power supplies and mosfet later.
When I cracked open the first one for testing it was lighting up one CCFL and only half lighting up the other one. When I stripped it down and took out the power board I could see that the were some burn marks on the transformer.
On testing the transformer the burnt side was shorted. I then tried another monitor and this was also suffering from a blown transformer. As you can see there was a bit of a theme going on with them.
It turns out 4 of them had completely blow transformers and one of them is making a noise so it is definitely on its way out.
I managed to get the others working by swapping parts from the boards with the faulty transformers. 1 of them had a fine transformer but a blown mosfet. One had a faulty logic board and believe it or not one of of them someone had disconnected the front panel of buttons which meant it wouldn't turn on. Once reconnected it powered on and worked fine.
I have got a deal on 10 transformers for £27 from china so I am sure I can get the others up and running when the transformers arrive. Then I can work on the not so easy faults and see if I can get them all up and running.
I will add a few more pics of the burnt power supplies and mosfet later.
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