Neither the remote or power on/off switch works to turn on

Your tv sounds fairly normal to me - there is a difference between a tv being switched off and being on standby. It is usual for a tv to need to be switched on manually and from there the remote would be able to switch it between on and standby.
Sometimes the "power" button of the remote only switches the set to standby and selecting a channel would switch it from standby...

DIRECTV - Support: Your Remote Control

www.directv.com/DTVAPP/equipment/demoInfo.jsp?assetId...

DIRECTVTrying to get your DIRECTV remote control to work with other devices? ... TV Power On & Off - If your receiver turns off while the TV turns on, press TV Power On ...

Program the remote for your TV - Fiber Help

support.google.com > ... > About the remote control

GoogleThe Google Fiber remote control is not designed to fully control external audio equipment. ... Press and hold the button on the original TV remote that you want to program on the Google Fiber remote. If the learning works, the TV power button on the Google Fiber remote blinks twice ...

You need to set up the cable box remote for your TV , now you are just turning off the cable box. Some cable boxes have a switched plug on the back that will turn on and off with the box. If yours has the switched receptacle you can use that to turn the TV on and off by plugging your TV into the switched receptacle. Make sure the TV power is on, the receptacle will kill the power so the clock on the TV wont work. Otherwise you need to set the code for your TVs remote and use the system power button.

The remote may or may not be the real problem, it is possible on most of these to gain access with back removed directly to the tiny button switch that is in back of the plastic power button on the set and press it with something not sharp (a micro switch is what the button activates) and if set comes on get the remote programmed.

Your best bet if the set will make it on that way is to get the original remote----if in North America with the model number of the set contact either Sharp or Andrews Electronics---usually the original is under 35 dollars and no headaches with programming.

If set does not turn on manually with the micro button you may now have a actual circuit problem in the set.

Check the remote with new batteries. If it do not work, remote control has the trouble. You can't switch the set ON by its front panel power switch, as it has been shut down by remote command.

10 Steps to Program Your Directv Remote

1. Turn on television.

2. Locate the switch at the top of your remote that allows you to toggle between receiver, auxilary, and TV modes. Slide switch over to"TV".

3. Hold down MUTE and SELECT until a small green light at the top of the switch blinks twice.

4. Enter code 9911.

5. Press and release the CHANNEL UP button repeatedly until television turns off.

6. When TV turns off, press SELECT.

7. Next, press the power button. This should turn the TV back on.

8. With television on, press and hold down MUTE and SELECT again until the small light blinks twice (same as in step 3).

9. Entercode 960.

10. Slide switch back over to "DTV". Your remote is now ready to use!

Could have a bad power switch or a bad ground on the switch itself. Will the original remote work to on and off the tv every time? If not you may a bad filter cap or two near the horizontal deflection.

If your DirecTV remote is in SAT mode and the power button isn't turning the receiver on and off, you will likely need a new remote. There isn't suppose to be any trick to getting the power button on a remote to work. However, only DirecTV tech support can confirm this. I would give them a call right away.

No, sorry, not from this distance. But if I were actually there, I would try to put the switch back where it belonged, IF it was not broken!

Will the tv power up with the power button on the TV control panel? If so its your remote sensor inside the TV. Let me know your model number.