HP Compaq LA2405wg screen goes blank after half a second

[brilo]

Hi, I have a Compaq LA2405wg monitor. I am connected to it with a DisplayPort cable to my desktop computer. The monitor turns on (green power LED stays on) and my computer recognizes that it is connected. However, the monitor only shows the screen for half a second, and then goes blank. I can initiate this by turning the monitor on and off or unplugging and replugging the display port cable. I can't get the monitor to show the menu or respond in any way except by power cycling or unpluggin/replugging.

Is this likely an electrical problem, or is it something I can fix by communicating with it, or doing a hard reset?

[praveenbv]

Hi@brilo,

Welcome to the HP Support Community!

Don't worry I'll try to help you out.

Did you make any software or hardware changes on your PC?

We reviewed your post and I understand that the  Notebook is not Powering ON,

Don’t worry, I assure you I will try my best to get this sorted.

I recommend you follow the below steps and check if it helps

Do you see a light at the place where the charger connects to the laptop? If yes then it indicates that the charger is all fine.

I recommend you to perform the following steps to isolate the issue and arrive at a fix: 

• Remove the battery out. If the battery is integrated and does not have a latch to release it then leave the battery inside the laptop.
• Disconnected AC adapter from the laptop.
• Press and hold the power button for 15 seconds.
• Reconnect the battery and plug the AC adapter.

F6 + Power Button

• CMOS Rest ( combination of windows button and letter 'V' then push the power button ones and release the windows and letter 'V' after 5sec

If the laptop does not power on then please continue with the below steps:

• Disconnect the charger and remove the battery out.
• Connect only the battery and check if the laptop powers on.
• Likewise, remove the battery out (if removal battery ) and connect only the charger and check if that helps.

Hope this helps! Keep me posted.

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