LED Displays on the E6400 Do Not use Inverters Correct?

Seconded. The space under the Dell logo on my LED system is empty. The only boards in the screen assembly are the webcam/mic board, and a small board in the lower left that contains the ambient light sensor and the LEDs that show on the outside of the display.

 

Is your display a WXGA+ by any chance ?

 

Yes, it is. I don't see how that would make any difference, but if you have an idea...

 

Well I'm grasping at straws. Emailed and called and most took the position of one4spl stating they need a constant current so a low voltage inverter is needed. Taken apart many laptops I will say this inverter is half of the size of the ones I'm use to seeing. This all would be easier of course if the Dell techs were more knowledgeable about their products. I might is disassemble my old one and put together what they sent and see how it looks Sunday, by the way whats up with the weird bezel setup is it a hassle to install and reinstall?

Thanks Dennis

 

Grrrr. If I wouldn't have accidentally wiped my desktop a few days ago, I would have been able to post photos of what mine looks like. I take pictures of everything when I take apart my computers...

Take yours apart and post some pics. I definitely rembember what mine looks like; we can compare. The bezel is a pain the first time, but then you get used to it. Just don't get frustrated, follow the exact sequence and method shown on the Dell site, and be patient.

One thing of note though, for the lower right corner, you may want to use a thin flat tool to pry the corner off. I used a lab spatula, but a very thin screwdriver or something similar should also be fine. I spent 30 minutes on this one tab until I did that so I hope I save you some time.

 

A very good practice. I just got of chat the agent stated I was sent the wrong parts and that the "parts people must of got confused"..........gives me a lot of faith, lol. Strange as like you found, the display itself the T661H, states it as a LED but it has a main display ribbon connector and a small one for the inverter on the bottom. Also on a website that sells the T661H it says its a LED display, inverter not included....hmmmmm. I wonder what they'll send next.


Dennis

 

not sure if this has any bearing on this conversation, but some e6400 laptops use a 1280x800 ccfl and some use an led. all the 1440x900 ones are led

 

LEDs use a low voltage. They are a diode which emits light when powered. The cheapest LED torches are just a battery, an LED and a switch.
Power to LEDs can be switched by transistors (think of all the LED indicator lights).

The LED backlighting for notebook displays is more complex than a single LED because they have to produce uniform white light, but the same principles apply.

The consensus of previous discussion in this forum is that the LED brightness is controlled by switching the LEDs on and off because some people see the display flickering at minimum brightness.

Yes, I think the transition of the 1280 x 800 displays from CCFL to LED is the cause of this thread. Dell don't seem to be very good in figuring out which notebooks have which backlight.

John

 

Well sure that is the problem with the 1280x800, Even the
replacement panel they sent was a ccfl, they finally sent the correct parts. Its been a PITA though. Many people just settle for what they get instead of jumping through the hoops. At least that's what I've been reading in other forums. They need to sort out that issue but.... if they did how many will choose ccfl over LED? I know for fact Dell is well aware of this problem.

Dennis