Re: Power board schematic request: Dell P2412Hb



I replaced the LED strip in the second monitor, it's now up and running correctly.

Glad to hear that the new strips are slightly better than the old ones.. maybe they won't die as quickly?...

Re: Power board schematic request: Dell P2412Hb



I'm no where close to an expert. Or novice. However in my adventures tearing down the two monitors I have, it sounds like the LCD itself isn't working in your monitor. The only thing I can suggest doing is ensuring that all of the internal connections are firmly connected. I've heard of an instance where a connection was loose.

If it isn't a connection, I'm guessing it isn't fixable unless you are an electrical engineer....

Re: Power board schematic request: Dell P2412Hb



I got the new strip on Saturday, and it fixed it! I installed it in the monitor that only ever flashed (the second monitor from my above post), and once I got it reassembled, the monitor worked perfectly.

I ordered another one for my other monitor.

What i don't understand is why my backlight works for about a week on the first monitor before it stops, but if I unplug it for a while it works again for about a week.

Scott...

Re: Power board schematic request: Dell P2412Hb

Quick side note: On the second monitor, the one where the backlight only flashes, I actually tested every single LED (all 70 of them) with 3.3v, and every single one worked. So if it does end up being the LED's... I have no idea why.

Re: Power board schematic request: Dell P2412Hb



I now have two P2412Hb's that are having backlight problems. The first one acts like yours, sometimes the backlight works, sometimes it doesn't. The second one, the backlight will just flash when you turn it on, but it never stays on.

On the first one, I replaced every single capacitor on the power board, and half of them on the LCD driver board, to no avail.

It seems like the longer the monitor is powered up, the less likely the backlight is to come on.

On the second monitor,...