The IBM L191P 19″ LCD monitor is an old monitor built around 2005. It has a Samsung LTM190E4 PVA panel giving some pretty nice viewing angles at a resolution of 1280×1024. It’s a fine monitor for business use, but we are noticing that they are beginning to fail in large numbers. Symptoms include: Constant power cycling when plugged into AC (pulsing green power LED), taking a while to turn on (needs the power button to be pressed repeatedly), or the backlight not turning on at all (graphics can be seen if you shine a flashlight on the LCD).
It has a very common IP-35135B Samsung PSU driving the CCFL backlights, and these are very prone to failure, long before the backlight even starts to dim. Let’s open it up to find out why!