My hp 19e is stuck in a constant color loop. I can not make the menu work or any other button.

Seems the wifi controller in the printer is fried. This worked for me.
Power on
Press Home button repeatedly while the unit is powering up.
When the menu appears hit these items quickly
1. Wireless Menu Icon (wifi icon)
2. Wireless Menu Button
3. Turn Wireless On/Off Button
4. Off Button

You have about 2.5 seconds to do this so it likely will take a few tries. When you have successfully disabled the wifi, the printer menues will work and the initializing sequence will finally complete.

You will have to hardwire the printer to an ethernet network or use some sort of wifi to ethernet adapter if you want to print over the network but the printer still works.

use usb connection from your phone and your computer to upgrade your phone's operation system from the samsung website

press back button continously

have you tried to go in the bios menu and display that screen

Hello
Same problem for me. found a procedure to get back to Service Menu which works for HP 8600 :
https://h30434.www3.hp.com/t5/Printers-Archive-Read-Only/X476dw-doesn-t-boot-Help/td-p/5044674
1. Unplug the power cord (!)
2. Insert power plug while keeping power button pressed.
3. While the HP logo appears on the screen, keep the button pressed. The screen will go dark. KEEP THE BUTTON PRESSED for another 5-10 seconds.
4. Let go of the button. The screen remains black.
5. Push Home-Back-Home-Home button. The buttons are usually not visible, so refer to the manual, where they are on the touch screen. (Home is left of the upper left corner of the touchscreen, Back is left of the lower left corner)
6. A blue menu comes up, with four choices.
7. MENU on the lower right has a FULL RESET option.

Do a factory reset of the monitor
by pressing the menu button or auto select
the use the "-" / "+" button to select factory reset and select yes
you can also try this:
Press and hold the menu or autoselect button of the monitor for about 20secs without the VGA or DVI / HDMI cable connected to it from the tower
If the problem continues. Switch off the monitor and remove the power cable and connect it again
Hope it helps u
All the Best !!!

post back with your model #- if I see your post I'll try to help

could be that the tack switches are corroded and shorting
called windex syndrome
disconnect the buttons and then try just remote

What you are seeing is a test they use at the factory. Here are the instructions to reset the monitor:

1. Press the MENU button
2. Use the + and - buttons to choose Advanced Menu
3. Press the SELECT button
4. Select Factory Reset
5. Select Yes
6. Press MENU again to remove the onscreen menu

Hope that helps :)

Actually, the code is 0,6,2,5,9,6,MENU on the remote.