Electronic Circuits and Projects Forum

JNHARRINGTON's problem did turn out to be the inverter board. Flipping the board end for end as in one of my other posts made the darkness move from top to bottom and did verify the issue

to Anro Fosyd:
The inverter lights the bulbs and general screen brightness.
The controller board sends power to the actual screen pixels and lights the individual pixels.

Since you said it does get dim after it gets hot, try unplugging the DVI after the darkness on the screen shows up to get it into the lor test screens and to get a better idea if it is inverter related or the controller.
If after it gets hot and if the darkness does show up in the colored test screens then it may be inverter related (possibly power board related). If the colored test screen are even brightness right after unplugging the DVI then it is probably in the controller.

Since it favors the one side of the screen, and if it is in the controller board, then it is more than likely in the large main chip at the middle of the board.

Maybe I should start a new thread on this, but I am also having problems with my 3007WFP. I have been using it as an external monitor for my laptop for a few years and it suddenly stopped working. It is not the laptop (I have tried it with other monitors).

The monitor will no longer wake up from standby - it remains completely black and the LED power light remains an amber color. If I disconnect it from the computer however, it turns blue and the monitor will cycle through colors in its self-test mode.

Doing the following steps fixed the problem for a day, but it stopped working again and the steps no longer are effective: 1) disconnect from computer, 2) disconnect power cord), 3) hold power button for 10 seconds, 4) reinstall monitor

Is this a power board problem? I watched bammbammfran's videos (very excellent - thank you). Does it make sense to remove the power board and inspect the capacitors?

There is a 95% chance that your problem is in the lcd controller board Also called a t-con board.
They used several model screens and t-com boards in these, so you have to open t to see which you have since the different models are not all interchangeable.
The Capacitors on the power board are pretty well rated ones and these boards hardly ever fail.
The controllers fail from heat, adding a cooler to the board is what I usually do to help prevent the replacement board from failing again.
Fran

Thanks bammbammfran. do you think the logic/main board is a possibility also? I found one of those on ebay but haven't been able to locate a controller board yet. On another forum I found someone with the same symptoms said replacing the "logic board"solved their problem

The logic board on ebay is the DVI main logic board
That one is not your problem board.
What makes it confusing is that some people call the lcd controller or T-con board a logic board which is probably what the other poster on another forum meant ( I did not read the other post that you are mentioning, so I can not say for sure)
Most common lcd controller board is the LM300W01 STA2 F11 which lcd_repairs may have since they have the ST A2 screen listed, BUT, some 3007s have different versions depending on which screen dell decided to use in your monitor.
Did you check your board number ?

Thanks again. The other post was on a different site, and i thought he may have his terms confused, but he hasn't responded. I haven't opened the monitor yet to get the board number. I hope to tonight, or tomorrow night more likely.

that's my board - the LM300W01 STA2 F11. I'll check with lcd_repairs.