Invertor or Screen

Unless the screen is actually damaged, it's not bad! Try the unit in a dark room, to see if the screen comes on momentarily! If it does, it could be a bad lamp, a couple of lamps, or the ballast, or even the SMPS (switch mode power supply)! You can't safely measure the power from the ballast to the lamps! You MAY see swollen capacitors in the SMPS. Without spare parts to try, it's hard to tell exactly which part is bad! Hope this helps, Dani.

Glenn Clark wrote:

I havent actually tried this but read it somewhere (possibly the FAQ) that if it was the backlight that was bad you could shine a bright light at the screen and see a picture (assuming it was powered up and connected to an input of some kind) this obviously rules out the lcd but you still have to find out if its a bad inverter or bad ccfl

cheers neil

It works, but you need a really bright light, sunlight works well.

the one and only test is to put a known good test bulb on it...anything from a scanner or other lcd ... be sure to note insulation where you make the connection since 1kv will arc if not good...and then oh oh

i am asking now...anyone...do the bulbs have polarity...i did just look at the electrodes from a dead one (crunched off the glass) and they were different...one was hollow ... the other looked solid and noticabely burned at the tip ... one of the several bulbs I have seen had a marking on one end ..C1 or it might have been C2

If the screen has lamps that can be changed, it is best to change both the lamps and inverter at the same time. After a number of years of use, the inverter can also fail.

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JANA _____

What's the best way to tell if the invertor is faulty or the lcd screen. I have a Dell laptop and have no display and need to order replacement parts

Many thanks

Glenn