I have a GPX TV/DVD combo Model # TDE2280B. I have only used it a few times -- now will not play a DVD even with a external DVD player connected to it -- "no signal" is the only message I get.

Hey Buddy GREAT NEWS !! I found this page on the internet, & here is the link below at the bottom, below some of the text from the page that I also copied and pasted for you:

Get GPX DVD remote codes! If you have a GPX DVD player and want to control it with a universal remote control, we have the codes needed. A GPX DVD player can be controlled with any universal remote if you have the correct programming guide and the correct remote codes. If the codes below do not work with your GPX DVD player, please leave a comment below with the model number of your remote control and DVD player and we will find you the correct remote code.
http://codesforuniversalremotes.com/GPX-DVD-Player-Remote- Control-Codes-Codes-For-Universal-Remotes


AND AS A SPECIAL BONUS JUST FOR YOU !!! YES !! All the remote codes you are likely to need. These guys will even help you out if you still nee help
Program your universal remote control to a GPX DVD player. Use the following remote codes.
GPX DVD Player 4 Digit Remote Control Codes:
0936
0944
2114
2390

And if by chance this info just doesn't work, please just go to the " CODES FOR UNIVERSAL REMOTES " WEBSITE, as these guys seem to be real " FIRETRUCKIN' GOOD !! "
GOOD LUCK TO YOU !!
Geoff

Some inputs on tvs won't process the color signal. Try one of the other inputs. Mine does the same. If u have already used the working ones on something else, U will need a switch to select one or the other available at Radio Shack if u can find one.

If you need further help, reach me via phone at https://www.6ya.com/expert/gary_9c859f4aa7e5ab10

The error disc usually means a dirty or bad optical pickup in the unit--DVD are more complex than CD etc and blu ray even more so.

tweezers...

Dear Lesley!
It looks, like your DVD lens might get contaminated with dust and/or dirt, which is being picked up off DVDs. Let's try to load music CD, instead or DVD. If it loads well, I will suggest, that your DVD player is at fault and you must give up using it. External basic DVD players are quite inexpensive and easy to connect to your TV. But: if no CD, nor DVD load, the solution might be much simpler: use lens cleaner CD with brushes. good ones might even have a special fluid, which applied to brushes(alcohol based). Just load it into your TV's player and follow audible directions. After couple attempts, your lens should be clean enough to play DVDs. Please, don't try to use any "ear swabs", instead. The lengths is not long enough, plus it may damage load mechanism or get stuck inside. I've seen such a cases lately.
Good luck,
Thank you,
Alex.

The remote control code for the GPX TV/DVD combo player is: 20699 or 20769 (Direct TV) Also try: 0699 or 0769

http://www.gpx.com/owners_manuals/TD730B-IB.pdf

If the TV is working with an external signal like a DVD player then the set seems OK on the output but if the signal to the TV is bad then it can bring about the noise in the audio due to poor signal strength.
If the signal is strong then it can be a mistuned SIF- osun intermediate frequency section-. you might have to trim this up.

Best bet/least effort is to get a newer, slightly more robust DVD player. This unit sells for less than $30. It costs more to ship it over from China than it does to manufacture the player. No kidding! For an ultra-cheap DVD player I'd go with a ~$35 player from wally world. Best of luck.

hey, unfortuntly i don't think the problem is with your dvd player but with your tv. I just searched the net because i'm on my second trutech tv that lost color. No matter where i plug it into, either the front or back composite connections i still have no color. I've tried multiple dvd players and even bought a converter so i could plug a dvd player into the coax connection. still a no go. horrible product

The 120 VAC to 12 VDC transformers they supplied with the TV are VERY prone to failure