Help with a way to power on monitor without remote

[bsweet0us]

So, I'm in the process of building my first cab as a Christmas gift for my mom.  Simple one-player wth 4/8 way swappable stick and 3 buttons as she's primarily interested in the classic 4-way games.  I've got the panels all cut and am slowly assembling them into something resembling a cabinet but I'm having a devil of a time figuring out how to make the start-up a one-button exercise.  I've got a smart power strip that will power up the speakers, marquee lighting, etc. when the PC is powered on but my monitor (!9" LCD TV....don't flame me) does not have a way of setting up any sort of power on after power restored or CEC power on configuration.

I've found posts from back in the day concerning using EventGhost and a USB IR transmitter (USB-UIRT cable, for example) to send the remote power on command but I'm not sure if any of those devices exist anymore or if there is now a more efficient way of doing this.  It's not the end of the world if I can't get it to work, but it would certainly take away from the experience if one has to power on the TV separately every time it gets fired up.

I know the knowledge base is much greater here than anywhere on the subject of cabs and I'm certain a solution will present itself sooner rather than later.  That being said, I'm not in the market for purchasing a different monitor and decasing and hotwiring is probably the absolute last thing I'd want to attempt.

Thanks in advance!

[Osirus23]

How locked are you to using the 19" TV? A 19" PC monitor instead would do what you need it to.

[bsweet0us]

I guess pretty much locked in.  I purchased it exclusively for this project. 

[lilshawn]

unplug the set and press and hold down the power button and see if it powers on when you plug it in.

if it does, great, just throw a blob of solder on the power button and call it good. if not... and alternatively if it does weird stuff when the power button is held down, solder a 100uf/10v cap across the power button leads... be sure to measure which is positive with respect to the circuit and place the capacitor accordingly. it's also probably 5 volts, but also check to be sure.

a capacitor acts like a dead short when it's empty, and has zero (near zero) resistance when it's near full so it will be connecting the power button leads when it's empty but will quickly fill and be open as if someone pressed the button.

[mahuti]

Does the TV have a.menu option to power on after power cut?

If it does then the TV doesn't need anything but that option set. -sorry you mentioned that it doesn't

I've used the solder method myself as well.

[PL1]

Another option is an "IR Blaster" to send the TV power-on code.

Several people have used something like this in their build.

Pretty sure you can roll-your-own with an Arduino.

- A quick internet search showed several promising-looking instructables and GitHub repositories.

- Try an Arduino sketch that has a short delay (allows the TV to initialize) then sends the IR code in the initialization part of the sketch before the usual program loop.

- If that doesn't work, you may need to use a time-delay relay connected to 12v from your PC so the Arduino is only powered for a short time.
-- For a setup like that, the relay provides power for maybe 10 seconds and the Arduino firmware pauses for 3 seconds, sends the IR code, then pauses for 30 seconds.
-- This way, the relay deactivates before the program loop runs again and turns the TV off.


Scott

[mahuti]

time-delay relay

I've been trying to find something like this for myself (see this post). I've seen relays that operate on a timer, so they'll fire after say... 5 seconds or a minute and lock open, or they're timed to open at a specific time of the day, but I've been having trouble finding a relay that when triggered operates for only a limited amount of time.

Any idea what I should be searching for, because I've yet to run across something like this.

Anyway, in the past when working with a TV, the only problem I have run into with jumpering the power button was that with one of them, that made it impossible for me to use the TV menu. In that case I wired a 3 way toggle switch so that there's a neutral position available. Most of the time it's just left with the thing toggled to ON.

[Vocalitus]

Crack it open and find out what panel it is and buy the control board for it.  Odds are it is a generic panel and you can them cheap on amazon or ebay.

[PL1]

time-delay relay

I've been trying to find something like this for myself (see this post). I've seen relays that operate on a timer, so they'll fire after say... 5 seconds or a minute and lock open, or they're timed to open at a specific time of the day, but I've been having trouble finding a relay that when triggered operates for only a limited amount of time.

Any idea what I should be searching for, because I've yet to run across something like this.

I think this one will work for your Q-Bert knocker.
- Check out the description of mode 12 (or maybe 11?) in the manual.  ftp://ftp.tvnalber.com/NEARD560.pdf
- One potential problem is that the trigger requires a high pulse instead of a low pulse (LED controllers use ground to switch on LEDs) so you might need a logic inverter.

https://www.amazon.com/UCTRONICS-Programmable-Multifunction-Segment-Automatic/dp/B07BT32T1M/

It should also work for an IR Blaster for bsweet0us running Arduino power through the COM - NC contacts. (Mode 1: On Delay)
- The relay starts de-energized so power is applied to the Arduino.  After the delay, the relay is energized and the power is removed from the Arduino.


Scott
EDIT: There's also this one that has a low trigger, but I'm not sure what modes it offers.   
https://www.amazon.com/DROK-Controller-Delay-off-0-01s-9999mins-Switching/dp/B07DFT2WDS/

[newmanfamilyvlogs]

Crack it open and find out what panel it is and buy the control board for it.  Odds are it is a generic panel and you can them cheap on amazon or ebay.

Probably this.
Universal LCD controllers can be had as cheap as like $12. They can be a bit of an adventure to set up though, but possibly less than any sort of time-delay relay or IR blaster setup.

[P-chan]

I recently had this question for the TV I'm using for my cab, and luckily the TV I'm using powers back up when power is restored without me having to tape down the powerbutton.  Give it a shot!

[Seob]

On my cab i just measured the power button on the control panel, soldered a few wires that i connected to a arcade button on the back of my cabinet. If i power up the system and the monitor won’t come on for some reason i can hit the monitor power button on the back of the cabinet to switch it on.