We have 3 Protron PLTV26 TV's Model LT26C1P1 I am

Since its a LCD take a flashlight and have the room as dark as possible and with the light look to see if a very very faint image of the picture can be seen or not---many of these sets use a "back light" for the brightness and if that's not on.......

Power supply module will be the first thing to check.
See the pictures of the boards here: http://www.shopjimmy.com/catalogsearch/result/?q=Protron+PLTV-26

If you are going to DIY and have proper tools, electronics knowledge, and know safety precaution then please read on:

Basic LCD monitor and TV troubleshooting guide:
http://www.fixya.com/support/r5093881-lcd_flat_panel_tv_troubleshooting_guide
http://www.fixya.com/support/r6150077-basic_lcd_monitors_troubleshooting
http://www.fixya.com/support/r7406380-tv_training_manuals
Failed TV and Monitors: http://s807.photobucket.com/albums/yy352/budm
Learn about bad caps: http://en.wikipedia.org/wiki/Capacitor_plague
Parts: www.shopjimmy.com
Capacitors kit: http://lcdalternatives.auctivacommerce.com/Default.aspx he can make you a set of caps.
Or www.digikey.com, just make sure to use caps with low ESR, 105c, high ripple current and long life rating such as PANASONIC FM or FC series.
Please post back what you find.
Please leave rating if it helps.

an output like ( HDMI ) would be on a dish reciever , and a hdmi input on a tv would plug into that output on the dish reciever
Is HDMI what you are trying to connect? then you would need an HDMI cable
HDTV = High Definition television , which means that you have a built in digital tuner that will pick up the digital and high definition broadcast channels with an antenna connected to the tv

If you have it connected to the 'antenna input' on your TV, change the channel up or down, and then back to 3/4 as appropriate. Sometimes the signal from the machine does not match exactly what the TV is looking for, but the TV will figure it out after you change the channel up or down. The AFC (automatic frequency control) will then try to re-tune the channel.
If you have it connected using the composite, and r/w audio, then you likely have a problem inside the DVR.
tom

Hi jnks2005, We need to check your backlight, while tv is on and you have sound, take a flashlight and shine it on the screen, look very close and see if you can see a dark video image, If so you have a bad backlight inverter. You can try to unplug your tv for a couple of hours and let it reset but it is most likely the inverter. Let me know what you see and I can help you locate parts and instruct the replacement. Please rate this solution. lone99star

Btw, I’m available to help over the phone in case u need at https://www.6ya.com/expert/jason_77a19afa8d604dee

You can try using an rf modulator to convert the coax signal into one that you connect to the tv using RCA jacks. I believe that model has one source on it for AV. Most stores carry these and they are relatively inexpensive.

If there is no digital tuner built into the tv or unless you subscribe to Cable TV or Satellite service you will still need a converter to view tv with rabbit ears (air broadcast).

Good luck!

I Can Fix It

how do you watch two channels on split TV on directTV

if you didn't damage it to bad you could take a wire and use it as a jumper to cross over the traces you drill thru.

I was told that in order to view 2 different channels at the same time u have to subscribe to SKYCable and use the digital input instead of the antenna input and the antenna input you will have to use the regular antenna since there is only one tuner in the TV