Where is the Infrared sensor on the Toshiba SDK990 DVD player?

Check the remote control for its infra-red emission. Check it with fresh batteries. Check by pressing all the buttons on it; and see whether all of it generates infrared signal while pressing. If it is found OK, check and replace the infrared sensor inside the TV. If you wish to get some details; check the site linked here. It has details about how to check a remote control; by one among the post. Surf the site with patience. Pull up older posts. http://electronicshelponline.blogspot.com/ If the remote control is found OK; check and replace the infra-red sensor inside the TV. Contact any service technician.

Check the remote control for its infrared emission. Check it with fresh batteries. If you wish to know more about how to check and repair a remote control, check this link. Pull up older posts there. If remote is OK, check and replace the infrared sensor inside TV.

Hello
Check the remote control for its infrared emission. If it is found OK, and still your device does not respond to remote control, the infrared sensor inside your device is faulty and should be replaced. Just enter into the following link. You can understand how a remote control can be repaired or cleaned. Do this first.
The remote sensors can be located just behind the infrared sensor window of your device. You have to open your device to access it.

Hello
Check the remote contro for its infrared emission. You can check it with a cellphone with camera option. Put the cellphone to camera mode, and place the remotes' front end towards its lens, at about one feet away from it, and press each button on the remote control. If there is infrared emission from it, you can see its image on cellphone camera screen. If not check the remote control. Check the battery polarity. If it is alright, you have to open it to see whether there is any loose soldering points developed or not.
If ther is infrared emission from the remote, and still the TV doesn't respond to it, surely the infrared sensor inside the TV is faulty, and should be replaced with same type and number. OK.

the problem on your remote i think,, infrared is defective you can testing that by using digital camera place on the top view in the front of infrared of remote when you press any button on remote the infrared should lights on to the camera if not your infrared is defective you need to replace that thank you

wawaw

Hello
You just check your remote control handset for its infrared emission. There is an infrared light emitting diode [LED], in front of your remote control handset from which infrared light rays are send to your TVs infrared sensor, fitted inside it, behind the infrared window on its front panel. Infrared rays are invisible to human eye. We can check if it is there by using a cellphone with camera option.
Put the cellphone in camera mode, and place your remote control's LED side towards its lens, for about a feet away or so, and when you push its each button, you can see an image in the phones' screen. If it is there, and still your TV don't work with remote control, TVs infrared sensor inside is faulty, and needs replacement.
If there is no infrared image from your remote control, you have to buy one new remote control. OK.

Hello
In all remote controlled optioned TVs have an internal circut section and a remotes sensor inside the front panel boad of that TV. The remote control hanset produces infrared rays of differnt frequencies, as we push each of its buttons. The frequency will be entirely different to one an other.
Infrared invisible rays are generated by an LED[ Light Emitting Diode], which fitted on the front side or the remote control hanset, and is directed to the infrared sensor window at the front pannel of the Tv, and will fall onto the infrared sensor inside it, and that sensor will convert these signals to digital format and gives it to the system control Ic to process.
The infrared sensor is a 3 leged element, which can be located inside the front panel of your TV, just back to the infrared window. It may get damaged, or may not get proper volttage. It shuld be replaced, if damaged, or find out the reson for the voltage drop, or no voltage condition.
Normally infrared failure is common. It is not so costly as you think, here in India we can get for about Rs25/= comes about 1/2 US Dollar. Ok.

replace parts "infrared diode" from ur remote control..
check polarity of infrared diode "anode-kathode"

I had the same problem and it took an act of Congress to solve it. However, I can tell you that through much more hard work and time than it should have taken I discovered the infrared code for my "One-For-All" remote model URC-4021B00 is--0651. Not sure if it's the same for any other remote control models, but give it a shot.