How do I get hd channels to show on sceptre 32 inch classic hdtv?

It could be that your PC is having video issues booting. Find another monitor and see if it displays correctly. If it does, your original monitor is defective. If it doesn't, your PC boot has video issues (bad drivers, recently installed software causing conflicts with video card, etc.)

Sounds like The main power supply regulator section circuit fault. Either it will be a separate board, or the part of main board. Check and replace damaged component/s at its main power regulator [SMPS] section circuit. Contact any service technician. If you wish to get some details; check the site linked here. Pull up older posts.
http://electronicshelponline.blogspot.com/
It will be best to replace the power supply regulator board as card basis rather than making "Surgery" to it; which usually will make loss for both money and time. Even though you can make it right, it will cost around an amount equal to the cost of a new board; including the cost of (spare parts + service charge) More to say, most of the spare parts to it will be difficult to get from open electronic spare part market. This is true to most of the flat panel TV power supply boards; irrespective of its brand and screen size.

Matthew

In order to recieve HD channels you need a Hd box, if you got one of those froma cable company like comcrap you might want to ask them to change it.

Its rare but it could also be your Digiboard, and or tuner. Let me know what type of situation you are in, Thanks

Btw, I’m available to help over the phone in case u need at https://www.6ya.com/expert/edwy_1a56970cf1ea4620

Your source has to be in HD like a local broadcast TV station currently broadcasting in HD which you get with a VHF/UHF antenna connected to the HDTV. Most primetime TV shows are in HD so using the antenna on the HDTV is all you need. Press MENU on your TV remote and make sure you have ANTENNA set instead of cable to get local TV stations.

You also could use your local cable TV provider. You would need digital cable service and a HD cable box with HDMI or component video cable hookup to the HDTV. HD channels are typically above 100. Call your cable TV provider for more details.

Read your user manual for the LG TV. Ask for help from family, friends, neighbors, local electronics shops.

If by regular cables you are talking about the standard red/yellow/white composite cables, then, yes, it will affect HD as composite cannot send an HD signal. Only HDMI and component (red/blue/green video only) cables.

Change to HDMI and let us know if it works for you.

No HD channels on a DCT700, you have to have a HD capable box from comcast. Usually $8.95 a month for box rental. Don't know a lot about DVD players. If you get a comcast HD box, and have an HD TV, you should use an HDMI cable for best picture. Second choice is component cables. Those are the red, white and yellow or red, white yellow, blue and green cables.

These units are not HD sets. So if you want HD sorry to say you will need a different TV. If you can live without the HD these TVs have a great picture thats as close to HD as a regular set gets.

The signal board is bad. Replace this board, its the one with the rca jacks and rf connectors. Warranty work will cover this repair. As we say in Nebraska.......Getter Done!!!!!

Have you tried an amplified antenna? It's basically a regular antenna but includes an amplifier to help bring in weak stations. An out door antenna may also help. I live about 3 miles from a TV station and can't pick them up due to the insanely old apartment I live in.