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When I power up the HP m8457c desktop computer the monitor displays the error message "no communication from computer" and goes into a sleep mode.

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This is telling you you have no video signal. Now you need to figure out just what the problem is. Could be the video card or any other piece of hardware in your computer. My bet goes with video card or power supply. Unhook the other stuff and try to boot with a "bare bones" system--that is, using only your video card, CPU, and memory. If you get video, try hooking up the other stuff until you find the bad part.

Posted on Sep 11, 2010

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1 Answer

My monitor seems to be stuck in sleep mode


This happens when there is no communication with video card. Check cables, re-seat video card, make sure monitor is set to correct mode. VGA (15pin blue), DVI (white), or HDMI.

Aug 28, 2012 | Dell desktop and monitor- Inspiron 530...

1 Answer

When I turn on the monitor, I get an error message: "Warning PC entering power saving mode", then it turns off.


Unplug your dekstop from the electricity then press and hold the power button on your desktop for couple minutes with out no power cable attached to it then let go of the power button then connect your desktop back to electrical outlet and press power button once that should give you display once it turns back on you can go into your power saving options and turn off power saver mode as its conflicting with your LCD sometimes this can occur if you have Norton antivirus installed
if after doing the power drain and still get same message then you can try using a different monitor if you have one for a test.
this issue is not with your monitor but with the PC has been stuck in sleep mode but the power drain should solve your problem.

Mar 01, 2011 | HP Pavilion F1503 15" LCD Flat Panel...

1 Answer

HPL1506 The input signal from pc display foe few seconds and goes off error recommended setting - 1024 x 768 - 60Hz


It can be that your PC video resolution is set higher than 1024 x 768 @60Hz for the monitor to display correctly.
Spec: http://h20000.www2.hp.com/bizsupport/TechSupport/Document.jsp?objectID=c00485268&lang=en&cc=us&taskId=101&prodSeriesId=1130384&prodTypeId=382087



Try this per HP:
HP Business Monitors - What Do I Need to Do When the Message Sync out of Range Displays on the Monitor? ISSUE: What do I need to do when the message Sync out of Range displays on the monitor? When the video card signal exceeds the frequency allowed for the monitor, the following error message may occur: Sync out of Range SOLUTION: To avoid the message, lower the resolution or vertical frequency of the video card. Reboot the system and use the VGA mode to force the video card driver to lower its resolution. Follow these steps.
  1. Shut down and restart the system. For consumer systems such as HP Pavilion desktop PCs, push the Power button once. For commercial systems such as HP business desktop PCs, hold down the Power button for five seconds.
  2. Immediately after seeing the HP/Compaq logo screen, press F8 at system startup to initiate the bootup menu.
  3. Scroll down to highlight Enable VGA Mode , and press ENTER .
  4. After Microsoft Windows completes its bootup process, access the Display Properties and select a desired resolution, which is compatible to the connected monitor.

May 20, 2010 | HP L1506 15" LCD Monitor

1 Answer

Hello, I have a HP 22w LCD monitor, running


Can you try the monitor on another computer? Also, make sure the cable is tight on the monitor side. And you also may need to replace the cable between the monitor and the computer.

Jun 13, 2009 | HP dx2300 Monitor Personal computer Intel...

1 Answer

Monitor goes to sleep


go to control panel, display properties, screen saver, turn off,
than go to power options, turn off the "turn off display" option.

Jun 06, 2009 | HP Computers & Internet

1 Answer

Delay in Monitor display once the system goes in sleep mode


Instead of sleep mode, tyr hibernate. It is generally faster except the whole computer shuts down. When you power back up, you're exactly where you were. Mine takes about 30 seconds.

Feb 06, 2009 | Gateway Computers & Internet

1 Answer

Hp vs17e monitor says it's in sleep mode then goes blank


If you are running Windows Vista,do the following,

  1. Click start,Control panel,
  2. Double click Power options,
  3. On the left menu bar,Click Change when the computer sleeps,Change "turn off the display" to never,
  4. Go down to the botton and select "Change advance power settings,
  5. Scroll down to Display and click the + symbol,
  6. Click the + symbol beside "Turn off display after" change to never,
  7. Click on the next plug + symbol beside Adaptive display and change to off (You may or may not have the adaptive setting)
  8. Click apply ,click ok,
  9. Restart your computer.

If you are running windows Xp

  1. Right click on an open area on the desktop
  2. Click properties
  3. click the screen saver tab
  4. Click the power button at the bottom
  5. Change the "Turn off monitor settings"To Never
  6. Retart computer
if this doesn't fix your problem,please let me know


Please rate this a fixya

Feb 02, 2009 | HP Vs17 17" LCD Flat Panel Monitor

1 Answer

No DVi input, then computer goes to sleep


Hi publicworker,

I had a similar problem whereas my monitor went to sleep mode after a few minutes. I'm running an HP LP 2065 in dual mode with another HP flat screen. However, I did resolve the issue after resetting the output settings.

How to do that:
  • right mouse click on the desktop
  • select graphic options
  • output to
  • extended desktop
Maybe some changings/modification will help you too.

Stefan

Jan 31, 2009 | HP 2025 20.1" Flat Panel LCD Monitor

1 Answer

Monitor goes into sleep mode after a few seconds


This is normaly cause by incorrect power management settings.

check power management setting in both windows and your computers bios

you will not need to worry about the power management settings of the bios when an operating system such as windows is loaded.

Loch Hiam
Az.

Sep 18, 2008 | HP Pavilion a620n (PC028A) PC Desktop

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