NO BRAND NO SERIAL NUMBER,BUT ITS A BLACK CAM WITH 3 LEDS ON BOTH SIDES AND HAVE A CLIP TYPE STAND WHICH CAN BE FISED TO SCREENS OF LAPTOPS

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Unfortunately Kris the answer I give isn't going to be one you want to hear. I've had the exact thing happen a handful of times on set's I had apart to replace the backlights, I'm not totally sure what happens but I believe your screen (panel) was damaged when it's removed and replaced, could have been from static when handling it, I don't know exactly what happens to it but when it's put back together it does exactly what your set is doing when unhooking one of the ribbon cables going from the timing to panel boards. On one occasion I had a set the same model and series and replaced every board, connector ect and in the set I had the panel out of I didn't get a picture, put everything back in the set I had repaired and it worked again, only thing I didn't change was the panel. One thing you can try is check all the smd capacitors on the panel boards for shorts, if you find one shorted remove it, I've had issues with them being bad on a few sets and make the picture black. Sorry I don't have better news for you

If you wish to get some details; visit the site linked here. Pull up older posts.
https://electronicshelponline.blogspot.com/ Search the site by type in the "BRAND NAME" of your device; (Exclude the model number), in the "Search box at the top right of the display window of the Homepage" to get gathered related posts

If you wish to get some details; visit the site linked here. Pull up older posts. http://electronicshelponline.blogspot.com/ Line faults & possible causes to LCD & Plasma screen are given with illustrations. You can get an idea about the fault to an extent. Faults to all LCD & Plasma screen are similar, irrespective of its brand and screen size.

The location of the serial number is the first step. They are located in 3 different places. Under the crank is the oldest numbers, the next is on the left rear dropout (the piece the rear axle is bolted to).Newest is on the right side of the headtube (where the fork is). If the headbadge is black and red, its china made and there is no catalog for them.

These blinks [flashes] are fault indication (Error Codes). From the number of blinks occur at one time switch ON, you can get an idea about the faulty circuit section inside it. This will make repair easy. These are called blinking codes. Make sure about the exact number of blinking of the standby/power LED, by switching On & OFF the set, for at least two times. Count it carefully. If you wish to get some details, check the site linked here. It has details about blinking codes, and fault locating procedure, to many popular brand TVs and other devices. Viewing it in "Mosaic" or "Magazine" will make surf easy.
http://electronicshelponline.blogspot.com/
Blinking codes details to many popular brand TVs are given. Surf the site with patience. Do a search by type in the brand name of the device to the search box.
Counting of number of blinks to Philips TVs is entirely different to that of other brand TVs. It is not a direct count procedure. The site have details about how to count the number of LED blinks [Fault Codes] to Philips brand TVs are given; along with details of the faulty circuit location.

Only a few brands of laptop put the serial number in bios. If you are able to get into Windows, there are a number of freeware programs that are able to get the serial numbers. Search Google for "Freeware serial number finder".

Hello,

I have had this same problem with a HP DV2000 and the problem is not the contrast light. What it is, is that the laptop thinks that the screen is been shut down that is why the light does not come on. The best way to solve this is to remove your keyboard first.

You can remove the keyboard by removing exactly 7 screws from your laptop back, there are 5 screws located under your battery and other two that are in the location of your RAM'S.

Just open them up and then you will notice that the key board pops out abit then just simply take it up and then just below the keyboard, on the same line where HP brand logo is on your machine there are two small clip types of pind, that you can remove and put back.
There is a clip that is hidden abit under the metal plate, so just try and remove that clip from its place using a needle or any long and thin object.

That will make the laptop not have the problem. But once you remove that the laptop constantly will think that the screen is open even if you close it. then after like a week or two you can put it back and all shall be fine if not then just remove it and keep it out.

You can then set your power options to shut down the screen light every 2 minutes or something like that so as to avoid the backlight being switched on all the time.

Hope this solves your problem.

Regarding RDL webcam, do you have any other specific info on the cam. model # or part #, anything at all?