Laptop LCD Screen Repair
erco
Posts: 20,256
I got a parts/repair computer off Ebay for $20 to support my fleet of Toshiba CL45's. After a BIOS reset, I found that the computer worked except for the LCD panel's LED backlight. The screen was dark, but if you shined a flashlight at it you could tell the screen was working. Plus, it put out a working HDMI signal to a TV set. There is little to no info on repairing these, so I was about to start swapping LCD screens with another laptop to isolate the problem. Finally I found this Russian guy's video at 
which gave me just enough info to determine that my LCD panel had a tiny blown SMT fuse on the 19V side which powers the LED backlight array. A bit of multimeter probing, a tad of soldering and I'm back in business now. BTW, used replacement panels are available for most computers for $40-60. I wonder if many "bad" panels simply have a 2-cent blown fuse. If so, this problem is just as significant as the bad capacitor issue that makes people throw out TVs and monitors after 3 years. Never say die!
which gave me just enough info to determine that my LCD panel had a tiny blown SMT fuse on the 19V side which powers the LED backlight array. A bit of multimeter probing, a tad of soldering and I'm back in business now. BTW, used replacement panels are available for most computers for $40-60. I wonder if many "bad" panels simply have a 2-cent blown fuse. If so, this problem is just as significant as the bad capacitor issue that makes people throw out TVs and monitors after 3 years. Never say die! 
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https://www.youtube.com/user/rossmanngroup