An LCD computer monitor easily repaired. Model: Mag 2000W
A customer brought this LCD computermonitor for repair. He explained that thismonitor does not power up. When I powered up the monitor, there was no indication of any life left in it. It was dead.
In my opinion, MAG screen are great and I love working on them.
This information found in the back of the LCD computer monitor.
With a flat screw driver, I started from the bottom, to open this LCD monitor. Once I get it started, I used my hands to finish the job. I have to be gentle when doing that. If I am not, I might break the frame. It is too fragile.
Sometimes there are screws holding the LCD panel and sometimes it just sitting there in the plastic casing. Be careful when pulling the panel out, usually there are the back lights and theLCD panel wiring there. It they were pulled too hard, you will end up fixing all these wires and some of them are hard to repair.
I got to the power board and the main board. Since the LCD computer monitor was dead, my focus was on the power board. Here is the power board.
It was nice and I could not see any plugged capacitors. I was expecting that but I was wrong. I powered up the LCD monitor and checked for voltages are the main capacitor but there was nothing there. It was really dead.
I traced it back words to see anything wrong with it but I could not see anything wrong till I got to the main fuse. The fuse was open.
I might just go and replace the fuse but that would not be right. If there is shorted component on the power board, the fuse would blow again causing more damage to the board.
The first suspect was the bridge rectifier but it checked ok. I checked the MOS N FET and it was also fine. I did a lot of checking on that board. Once I made sure it was fine, I replaced the fuse, look what happened.
It is alive again. Only an open fuse was the cause for this dead monitor. Yes, sometimes it is that easy but make sure everything checks fine before putting a new fuse back on the board. Mission accomplished.
This article was prepared for you by Waleed Rishmawi, one of our ‘Master Authors’ and currently working in the Bethlehem area of Palestine repairing electrical and electronic equipment.
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