Problems with 676 and HP TV

Can you turn TV on and off with Harmony in device mode?
Did you try to learn some TV's commands, like on/off?
I guess it's a good idea to try different model.

Is it all commands for that TV or just the power toggle?

Have you tried adjusting the repeat counts and delays via the troubleshooting section for that Device?

If that still doesn't work, call Harmony tech support and they will fix it for you, even to the extent of going in and editing the commands if necessary. If they need you to re-"learn" any commands they will walk you through that.

I suggest you start with the power toggle command as a sample. Whatever works to fix that will likely work for the others as well. If you need to re-"learn" it, do it with a new name such as "PowerToggleRAW" so that the original database command is still in there for comparison.

The database entries are only as good as the information they are given, the care taken in entering them, and the feedback they get from owners like you. It is quite possible the database entries for your TV are simply wrong for one reason or another, in which case they will correct them. But it could also be something simpler like having to raise the repeat count in the Harmony for that Device before the TV will recognize that a command is being sent to it.
--Bob

Take heart and be patient. The Level I support guys just do the basic stuff, but the Level II guys will indeed work with you as long as it takes until the problem is resolved. If necessary, they will call on their group of experts in the command language itself who will actually go in and edit the commands in the configuration file for your TV until things work right.

In the meantime, if you want to try repeat counts they are easy.

Some devices won't accept a command unless they see it multiple times. This is one way they reject commands that are actually intended for some other device.

In the setup program for the Harmony, go to Devices, and the particular device for your new TV. Now select Troubleshooting. It will offer a list of possible problems. Select the one for "show me more problems". It will offer a new page with an item about commands not responding properly. Select that one. It will offer a new page with different ways the commands are not responding properly. Select either the one that says commands happen too many times when you press a button or happen only occassionally when you press a button. It will offer a new page where you can select the repeat count for that device.

The default repeat count is usually 3 for most devices, which is usually more than enough. A repeat of 1 is really all that's needed for most devices, and a repeat of 0 works for many. Lower repeat counts make things faster (more responsive to multiple button presses). Higher repeat counts make things more reliable, but may cause the device to act on the command more than once, which could be a problem with things like Volume Up or Down.

Whatever the current repeat count happens to be, try boosting it up 5 (the highest you can set), reprogram the remote, and see if your TV will now recognize commands issued from its Devices panel on the remote. If so, you can lower repeat count and try again.

Repeat count changes affect just one device, but they affect ALL commands (Device or Activity) aimed at that device. If you find that a high repeat count makes Power work but screws up other things like Volume Up/Down, Harmony support can adjust things in your configuration more finely than you can do yourself.
--Bob

I meant different TV model. Did you try that?

You can see what delays the Harmony is set to use for your TV.

Go to the Devices setup for your TV and one of the options will be to see and adjust the delays.

There are 4 delays intended to give your device time to do what it needs to do after specific types of commands.

1) Delay after a power on command sent to this device.
2) Delay after each command (inter-key delay) sent to this device.
3) Delay after a command which selects a new input on this device.
4) Delay after any command sent to some other device before any command to this device gets sent. This gives your device time to realize the prior command to the other device is done so that it stops rejecting any command input under the mistaken belief that it is still part of commands for the other device.

Typically these are set quite high by default. See the first post in the Harmony performance sticky thread at the top of this forum.

It is also, apparently possible for commands in the database, or even commands you learn, to be misidentified according to which delay applies. Harmony support can fix this if that's the case.
--Bob

More likely someone asked HP how much delay the TV needed for power up, and HP said 20 seconds or so (i.e., assuming the TV wasn't in "instant on" stand-by), and Harmony bumped that up a bit for safety.

Garbage in, garbage out.
--Bob

Recheck how your Activities are set up -- i.e., that you have actually specified the TV needs to change inputs when you change Activities. Recheck how the Inputs are setup for your TV -- i.e., that the correct command is being sent to select each Input. Just start from Troubleshooting and run through the setup again for the Activity -- it won't alter your other button setups.

Next increase your inter-device and inter-key delays for the TV. You may also have to increase the repeat count for your TV. All of this will increase the chance that the TV will see the input change command during the series of commands issued when the Activity starts.

If the Activity is also turning on the TV, then you may need to increase the power on delay for the TV as well. Not up to 26 seconds of course, but something reasonable to give the TV time to get set to process the input change command.

If the command is working from Devices then it can be made to work in the Activity.

Once you've got it working when you enter the Activity you can lower delays until you find the sweet spot that works fast enough to satisfy you but still works reliably.

Again there's some guidance on this stuff in the Harmony performance sticky thread at the top of this forum.
--Bob

You might need to introduce delays between commands sent by remote:
rerun setup (set inputs, devices on/off), but when it asks if this all you want, say"Yes, but I want to add more control of options and devices for this Activity", it will rerun setup again, but don't worry, after a few "next" and "save" it will allow you to add additional actions, like for TV delay after it sent On.

I'm glad you sorted it out finally.