TV changes from input setting to channel 3 when turned on.

If you can get into the menu with the buttons do a channel search with whatever your source is turned on. Hopefully it will catch it. If not you will need to buy a cheap little remote ($5 or so)

Make sure that your tv tuner is set to the correct rf frequency of channel 3 or 4.

Bring up the menu for the tv with the remote and try to find something to the effect of resetting everything to factory default settings. If this does not rectify the problem, it probably is not worth taking in to get fixed as this can be very expensive and the tv is older anyway.

According to apex its not and does not have a digital tuner the only way this can be high def would be 720P meaning 720 lines progressive scan.

Your aspec Ratio is 4:3 this indeed is a standard TV without a digital tuner so you will need a digital setop box or a digital tuner.

High DEF is not considered digital its conidered how many lines are displayed on the TV. For example 720p, 1080p .

• Silver, 27-inch monaural television; 29.6 x 23.2 x 18.7 inches (W x H x D)
• Front-panel audio/video input accommodates a camcorder, VCR, or gaming console
• 3 rear AV inputs (including 1 S-video input), 1 RF antenna input
• Channel scan, channel recall, closed-caption display
• Offers V-Chip parental control, sleep timer, auto-off, and a full-function remote control

Technical Details

• Brand Name: Apex
• Model: AT2702
• Display Technology: CRT
• Display Size: 27 inches
• Image Aspect Ratio: 4:3
• Speakers Included: 2 speakers
• Height: 18.7 inches
• Width: 29.5 inches
• Depth: 23.2 inches
• Weight: 88.2 pounds

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If you are using the RF input are you sure the channel on the TV did not change? Make sure the TV is set on Channel 3 (or 4) or use the component (red-white-yellow) outputs if your TV has component inputs available.

Don't think it can be done,you'll have to change it manually or it should go to AV1 when you turn on the cable decoder.

The direct tv remote will control all of your electroincs set that one up for all of your needs ...codes for tvs in the direct tv book! make sure you change the selection on the remote!

if there's a channel and volume display but no picture,the problem of your tv is ABL..it is a resistor value from 10K ohms up

I believe you will have to have a tv tech. do this adj. , this is set in the factory service menu which he or she can access.

blue screen indicares that there is a problem in blue cathode circuit. please check 1 blue video output supply. 2 blue video ckt defective 3 signal from chroma ic to blue cathode missing. 4 loose connector 5 crt base loose. 6 chroma ic defective. I think sound will be ok .