A dead LCD computer screen was brought to my shop by a friend of mine. When I plugged the screen in the electrical outlet, could not see any picture on the screen not even a stand by light. It was a very easy fix. I hope you will enjoy the repair, as much as I did. So, let us begin.
Upon taking the cover off and took the PC board out, I immediately spotted two bad bulged capacitors. Before I replaced the two bulged capacitors, I checked the fuse and it checked out ok, otherwise I will have to check all kind of component if the fuse was open.
Now was the time to replace the two bulged capacitors. They were both located in the secondary area of the power supply. Both have the value of 1000uf/16 volts. I scanned the secondary area of the power supply for dry joints but there were none.
I closed the LCD screen cover and hooked it up to my computer and to my surprise, the stand by was on but the picture was not clear, it was not sharp, and the blue color dominated the screen. So, I thought it was a bad screen but when I re opened the screen and checked the LCD panel with my back light tester, all back lights checked ok.
Now, my thoughts shifted to different kind of problem. Yes, it was the data cable connected between my laptop and the LCD screen. I got a new cable and the picture was nice and colorful.
It was an easy fix and easy money; sometimes I get that in my shop and what a joy it was.