Wednesday, 26 March 2014

LCD Monitor LED Backlight Conversion Update

I think I have finally managed to convert an LCD monitor with a faulty backlight to LED backlighting. As is very common the cold cathode lamps or the inverter had failed so instead of a clear white light I was getting a purple sort of hue and not a very bright one at that.

This is a tricky enough job and the first 2 I tried, an old TV and a monitor,  didn't survive the surgery, but this one seems to have. I need to finish the wiring, but early tests show a good image.

UPDATE - 1st April 2014

The inverter had failed and there was a tell-tale burn mark round one of the transformers on the PCB. I got the LEDs wired to a 14v feed from the power board in the monitor. A good hack I think, but a brightness control will need to be sorted out using a cheap PWM power control module.

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