I have a sceptre x42gv komodo 42 lcd tv for about three years, and lately the tv has had problems recieving the signal from the hdmi port to the DVR. it would show the picture in a very very dim light with no sound, or have sound and no picture. sometimes the HDCP warning on the tv would show, but I know there is no HDCP problems. now when I turn on the tv it doesnt show any picture and makes a buzzing noise. I want to know how to tell if this is a power supply issue

Check and replace the damaged component/s at its main board. Contact any service technician. If you wish to get some details; check the site linked here. Pull up older posts. Surf the site with patience. http://electronicshelponline.blogspot.com/

Fault with its main board. Short circuited component/s at it. Contact any service technician; or the authorized service center. If you wish to get some details; check the site linked here. Surf the site with patience. Pull up older posts. http://electronicshelponline.blogspot.com/ . In most cases, the main board might have to be replaced. If so, a software [firmware] update too might be necessary.

If you wish to buy its original remote control, you have to contact the authorized service center. If you wish to buy a universal remote control, you should know about, which brand remote control have setup code to your TV/device brand. You should first make sure about the number of digits in the codes to your device have. There are 3-digit, 4-digit, 5-digit and even 2-digit codes. You can get this detail by the code list attached to every universal remote control. The brand name of the remote control you select isn't a matter; but, its code list should have setup codes to your TV/device brand, otherwise you can't set it up with your device. Check this link and note which brand remote control have set-up codes to your device brand, and buy that brand remote control, according to availability. . If you wish to get more information, check these links. Setup procedure, and setup code list to many popular remote controls are given. Pull up older posts.
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The main tv Tuner signal board have problems and all those HDMI insert ports are shorted dead,those HDMI insert ports are put on by wave soldering machine and fused by iron core solders joints to the main tv Tuner board itself.These HDMI insert ports are not replaceable by hand soldering equipments or can buy those HDMI insert ports individually anyway.Tv still work wright?Yes? Why don't u just skips the used of those HDMI insert ports all together and tries used those RCA component cable connections like AV1 and AV2 on the tv.Or u must have some mechanicals skills and like take things aparts and putting back together again?Yes?Tries websites like Shopjimmy.com,Ebay.com to buy a whole refurbish tv main Tuner signal board for the replacement to able to used those HDMI insert ports again.I have the same problems with my Samasung 46" all my HDMI insert ports are dead too,but the tv still functions.That what i did used RCA cable components connections for my cable box and blu Ray player.

The first troubleshooting step would be to play around with the audio and audio output settings on the Comcast receiver. If you have it connected to your television with an hdmi cable the output should be changed to hdmi. If it is set on bitstream change it to pcm. If you have the choice of setting it on 48khz or 96khz then do so. It is in the Comcast receiver's settings if you are getting sound when connecting other devices to the television.

possible T-con problem but check LVDS cable first and don't forget checking capacitors from the power supply board

I have a sceptre tv x42 I lost my cord don't no where to buy another one

If your getting it to work on the regular RCA Jacks then it is your dvr box problem. I would contact your cable provider.

YOU PROBABLY HAVE DEFECTIVE LCD PANEL THERE IS A SLIGHT CHANCE IT IS THE MAIN BOARD OR THE LVDS CABLE

Hi there. The actual button option that you will need to use for this adjustment will be the aspect button and, unfortunately, this button is only on the remote and not on the TV itself. If there is a control panel located on one of the sides of this set, you may be able to push the menu button here and navigate your way threw the menus screen to the aspect option. I suspect you will need the remote.

please rate and God bless..