How do i switch it to hdmi with universal remote???

That make model number is a mess. You need 'make' and numerical model number only.

Here are your codes

https://myuniversalremotecodes.com/onn-dvd-universal-remote-codes/

Usually you can but replacement remotes, but this is Walmart's own bargain basement brand from China, made at the lowest cost point and the highest profit. Quality is not a consideration!

https://www.google.com/search?q=ONN+ONA19DP005+remote

..

You are confused. The applicable code would be contained in a universal remote control Amazon com MALLCROWN 4 Port 1080p HDMI Splitter with Ac Power adapter...

Split one HDMI input signal to four HDMI output signals identical to the input signal Amazon com MALLCROWN 4 Port 1080p HDMI Splitter with Ac Power adapter...

Codes are in the remote. Use code search to find something that handles some or all functions of your DGM TV. If a search through all codes stored in the remote fails, you may have to try a different universal remote. All universal remotes do not store all possible codes. Amazon com MALLCROWN 4 Port 1080p HDMI Splitter with Ac Power adapter...

On your Visio TV remote control there will be a Source button or Input button. Press it & on your TV screen select HDMI 1 or HDMI 2. See the TV to see how the HDMI cable is connected from TV to Set Top Box. Now take the other remote control i.e. Sony Universal remote in your hand. Press mute & Select simultaneously. A blue light will blink twice, Immediately release the buttons & enter the code. You have to be extremely fast in doing this.
Following are few codes which you can try:
002, 000, 011, 080, 111, 006, 071, 128, 1904, 925, 0000, 0834, 0810, 1685, 1786, 1032, 1972.
Check the Visio TV manual for the make of your TV & model no & if code is printed. Then contact Visio TV manufacturer or retailer for the Visio TV code to enter & synchronize with the Sony Remote Control.

Use code: 0547.
I figured out this code mostly. Just took half an hour on auto-code. I have the GE 6-Device Backlit Universal Remote Control #47506.
The power will work.
HDMI 1 = #5
HDMI 2 = #7
HDMI 3 = #Unknown
HDMI 4 = #9
If you figure out a better code, or how to get to HDMI #3, let me know.
This appears to be a code for the following CD players:
Sears
Realistic
Teac
Marrantz
Sherwood

newer tvs need to know that HDMI is attached to give you signal also need to turn on device from where HDMI signal comes from.post the model of your tv ,or if universal remote has input try this,1.- connect hdmi ,2.- turn on device(dvd,ps3,blue ray, etc.) 3.- press input on remote ,or go to menu manually on tv and find input.hope it works.

Sometimes you can unplug the hdmi cable and power off the tv and unplug power to tv wait 10 sec plug tv back in and then insert hdmi cable. Some of the newer tvs will auto tune to the input if that dont work, try getting a universal remote program the remote to control tv if you can control tv volume, power , menu then you should be able to navigate to the input menu and select hdmi that way

Ive had the same problem with mine. I have a universal remote and a blu ray player separately installed on my tv. The only way i was able to play the ps3 without calling geek squad to reconfigure my tv was to unplug the blu ray and put the ps3 in its spot and push watch bluray. It worked great.