The buttons on the front of the monitor dont seem to work.

If none of the button are working then it could mean that one of the buttons is stuck or there is an issue with the board on the monitor itself.

Unplug the monitor from power and the computer. Make sure none of the buttons are stuck down, plug only power back in to the monitor and see what it shows. Plug it back into the computer and check to see if the problem returns

restore your settings to "Factory Settings" by

use the front panel buttons

Power Turns the monitor on and to standby or sleep mode.
? NOTE: The power button is located on the top or front of the monitor depending on the model.
- Menu Opens, selects, or exits the OSD menu.
-Adjusts the volume level.
-Opens the Quick View menu to quickly adjust settings for gaming, video, photo, and text.
? Navigates backward through the OSD menu and decreases adjustment levels.
+ Navigates forward through the OSD menu and increases adjustment levels.
Auto Auto-adjusts the display
Select Enters the selected option.

Sounds like one of the buttons on the monitor is sticking physically. Try:

• checking the buttons for dirt that might be holding it in
• cleaning the buttons with a soft brush

dirty switch. I took my 2009m apart and cleaned the switches with alcohol on a qtip and the problem's gone. Not too hard to do. Leverage the case gently with a putty knife or something and it will pop open. Then pop around the edge to remove the back completely.

Once you can try providing "reset" option from the menu .... This will solve most of your problems ..

this is not HP.com sorry, its a BULLsession blog, mostly guessing
QUESTION TO YOU.
no computer stated, 10000s exist, 1981 to now, endlessl....
we get you have a display connected to what>? who knows.
I hate guessing
but is display connected to a desk top PC?
that it.
so if you barrow and other display does it work ok?
it has 2 cable (not power) one is DVI other is VGA
which one are you using.

ok i see your confusiong
yes, the monitor has its one menu's and the bad designers
dont tell you that, all pop up windows need to say who is talking to you in this case "F2105" is not in the window.
geeks design it and this is what you get.
even windows 10 does this inane acts,, it pops up
and forget to say , I'm W10, only the blue color dark is the clue)
so dont feel bad, its the lame geek disease there.
what does this mean
that you need o learn the buttons on your monitor
one is to clear those screens its in the manual.
best is dont use those buttons. if possible. on side of monitor
the monitor has its own tiny computer brain that is helping you.
avoid it.

the button on most monitors (mine has 5)
menu button,. press one to get menu press again to exit
some have an exit button push it.
lost your manuals>? hp.com has them, ask.


http://support.hp.com/us-en


your monitor has speakers, those need to be connected. to the PC.



http://support.hp.com/us-en/product/HP-Pavilion-21-inch-Monitors/81806/model/461641/document/c00665777/



the screen box is called, clear it now using manuals above.
On-screen display (OSD)

§ Turn Off the Monitor.
§ Unplug all the Cables from the back of the Monitor.
§ After unplugging all the Cables press and Hold the Power Button at the Front of the Monitor for 20 Seconds.
§ Plug all the cables back.
§ Turn it on.
§ See if you get the Picture on the Monitor.
§ if you don’t get any Picture then.
§ Unplug the Cable which is connected at the Back of the CPU.
§ If you get the Message "No Input Signal” or "Check Video Signal" it means that Your Monitor is Fine.
§ Try doing the Factory Default settings from the menu Buttons at the Front of the Monitor.
§ If you don’t get any Message then it means you Monitor has Gone Bad and Needs to be replaced.

One of the buttons on the front of your monitor is probably stuck.
(Only one of the buttons work at a time on most monitors)

I cannot recommend taking it apart your self (have a tech do it)
But take off the front, check the buttons after you take off the front, and if it still occurs unplug the buttons from the monitor.
If it stops (which it should) replace or fix the controls)
If it doesn't, call an exorcist (just joking) or buy a new monitor.

cableman try this exactley to the "T" with the instructions in front of you. The procedure resets your monitor to factory settings. On step 13 use the factory setting on the right side menu block not the left. It may or may not work if you have a bad board or eeprom. 1. Using the Volume button (Remote or Monitor) turn the volume all the way down.
2. Hold the Menu button on the Monitor.
3. Press the Menu button on the Remote.
4. Press and hold the Volume button on the remote for 5 seconds and then release the Menu button on the Monitor. After this step the date will appear on the left side of the screen within 10 seconds.
5. Click the Menu button on the remote.
6. Click the Left Arrow button on the remote.
7. By using the Down Arrow button, scroll to Settings and then click the Left Arrow button.
8. Highlight "Eepreset" and click the Left Arrow button. (The monitor will turn off at this time)
9. Push the Power button on the remote, the unit will turn back on.
10. Click the Menu button on the remote.
11. Click the Left Arrow button on the remote.
12. By using the Down Arrow button, scroll to Settings and then click the Left Arrow button.
13. Highlight Factory and click on the Left Arrow button to select "Off"
14. Click Menu on the remote.
15. Click Menu on the remote.

sounds like maybe the remote contol is at fault.Do the front panel buttons work?