Monitor reports no signal then goes to sleep.

I posted this problem 5 months ago and many, many other people have reported this since 2011. After 4 years, still no solution from HP. Not even a clue of a solution.
So HP, are you reading this?
My monitors goes to sleep for no appearent reason. Windows is running fine, I can RDP to the computer but my monitors are useless. This problem emerged in the first week of purchase and disappeared for some time. And today it is back again. If I reboot (kill) my system about 5 times the signals come back on, but my monitor 1 has a resolution of 640x480 and can not be changed.
This is obviously a hardware fault, a design fault of some kind. Why isn't there a recall for ALL HP monitors. It seems that all HP desktop systems with DVI connection to HP monitors have THE SAME ISSUE.
For me it is clear now that HP is not able to fix this or does not care about it. This was my first HP system, and my last. Ever.

Scott007,
First thing I would do is changed the monitor settings so that it NEVER sleeps or turns off. Next thing is to access the display menu and reset to factory defaults. The last consideration would be to adjust your opinion. I have never had these problems with any of my HP branded computer or monitor systems. I have also used DVI to VGA adapters, as my 24/7 monitors are lowly VGA units. I manually turn them OFF.
I re-read your previous commentary (2014). Did you read the entire post and comments? There was a reference to turning off hybrid sleep. I encourage you to try this remedy.
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Monitor turns on. Says it's not connected to anything then goes to sleep.

I was on my computer and monitor perfectly fine. Then I moved my desk un-plugged all of my equipment and moves that too.. I plugged my monitor in and my computer in just like it was 5 minutes prior. Now when I try to turn my computer on it works fine but when I turn my monitor on it says no connection then goes into sleep mode any tips?

UPDATE: I tried a different monitor and 2 more different cords and neither worked.. It's a computer problem

G5 startsup one in five times and then goes to sleep

Hi - I have late 2004 dual G5. Recently it completely boots up and shortly after, puts itself to sleep even while I am working on it. Then it sometimes does not turn at all and just has a black screen.
I have done everything I can think of. Reset the PMU numerous times, done an openfirmware boot - but after reset it doesn't turn back on. Tried to boot from Install disk, doesn't work. Tried to reset PRAM - doesn't work. I have reseated the RAM and now it soemtimes turns on with half a balck screen and the rest white and then nothing happens.
I have unplugged it over night, held the power button down 15 seconds unplugged, etc...nothing works. It does not chime and if I remember correctly has been working without the chime for awhile.
If I leave it unplugged long enough, it eventually turns on and then I can look in the console log (exit on exit code:6) but I cannot run the disk utility or do much of anything else.
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Thanks - I don't think it is the battery as I did replace it recently. I have tried to start up in openfirmware and never get past "cataloging file". I have tried Safe mode and can't get past the grey screen and I have tried C on startp - nothing. And finally, I have tried holding down option on startup and get to the right screen but it freezes when it gets to the watch. Guess I better give up and bring it to the shop and see if it is worth fixing.
It still turns on completely and goes through the whole start up process - it is just that it then goes into sleep mode. I can wake it 2 or 3 times and then I only get a black screen. I have to unplug the power from the back of the computer and let it sit at least 15 minutes for it to go through the startup process again.

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Someone have the same problem on Powerbook G4 15" ? : Power Management received emergency overtemp signal. Going to sleep.System Sleep ! (System.log)
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To other readers of JC_ASSE's happy outcome: be aware that the illustrations on this page, which he apparently followed, show a disassembled Aluminum, NOT Titanium Powerbook, and that a Tibook doesn't come apart the same way or have the same parts in the same places. I have no idea whether the trackpad heat sensor in a Tibook (if there is one) can be disabled, but it certainly can't be done following those instructions: the underside of the trackpad and the associated cabling are very different. Don't attempt the procedure shown on the page linked above unless your Powerbook is Aluminum.

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have a dual gig MDD and suddenly the thing just started going to sleep or powering down right after booting up.
i've taken everything out and unplugged eveything to bring it back to it's intial state; i've zapped pram; i've pulled the battery; nothing seems to help.
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An overheating proc can definitely make the thing go to sleep. But I don't know what would make the fan power stop working. I believe that's controlled by the PMU, but you've reset that.
I've seen some pretty strange PMU-related behavior, so nothing would really surprise me. Just today, I found that my firewire ports weren't working - they'd power peripherals, but I couldn't get either of my FW drives to show on the desktop. I booted to two different internal drives and had the same problem. I reset the PRAM, NVRAM, and the PMU and no improvement. Finally, I unplugged the PRAM battery, hit the PMU reset button, and let it sit an hour before plugging it all in again and viola - firewire worked!
It might seem redundant, but if I were in your shoes, I'd unplug that PRAM battery again, hit the reset button, leave it out for a couple of hours, and then plug it all in again to be absolutely sure. Also, be sure never to press the PMU button twice between starts.

IBOOK G4 Powers on then goes to sleep after loading, any help?

I have a 12 inch IBook g4 purchased less than a year ago. On power up, screen loads, Pop-up says date set prior to March 1, 2001, icons and wallpaper load and then book goes to sleep. All in a matter of 3-5 seconds. Help me please

I too am having problems with my ibook falling to sleep or quitting. It also sometimes loses the backlight of the display. I took it to an apple authorized dealer and they eliminated the possibility of the cause being the cord, the batter, the airport card, or the ram. I also get the message of it having the wrong time set in the clock before March 2000. The time is not set wrong.
I am also having an issue with the powercord. When pluged in so I can recharge it doesn't always sho that it recharges. I have to rearrange the cord to get it to register that it is charging. This ibook is only 18 months old and giving me unbeleivable problems. My imac is 8 years old and still running...slow but running. what gives? I make my livng on this little ibook so I really need answers and the dealer is not very helpful. Please help I'm desparate!

Wake Desktop Comes Up Then goes to Sleep Again

50% of the time when I open my MacBook Pro( late 2008 2.4) the desktop appears "briefly" and then screen goes black signifying sleep mode. I have to then tap on space bar to get it to wake up again. This only happens on startup, never, goes to sleep when machine is active.
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I reset PRAM and VNRAM as per:
Resetting PRAM and NVRAM
Shut down the computer.
Locate the following keys on the keyboard: Command, Option, P, and R. You will need to hold these keys down simultaneously in step 4.
Turn on the computer.
Press and hold the Command-Option-P-R keys. You must press this key combination before the gray screen appears.
Hold the keys down until the computer restarts and you hear the startup sound for the second time.
Release the keys.
Reseting PRAM and VNRAM made no difference. I have Apple Care if no one here has a solution I'll give Apple a call.

HI,
Try resetting the SMC.
http://support.apple.com/kb/HT1806
And try deleting this file.
com.apple.PowerManagement.plist
MacintoshHD/Library/Preferences/System Configuration
Move that file to the Trash and restart your Mac Pro.
Carolyn

External monitor reporting no signal despite detection in xrandr

I've installed Arch and xfce4 on my Macbook Pro retina 10,1 (2012). I'm trying to set it up with my Asus PB278Q external monitor.
When I run xrandr, I get this output:
Screen 0: minimum 8 x 8, current 4800 x 1800, maximum 16384 x 16384
DP-0 disconnected (normal left inverted right x axis y axis)
DP-1 disconnected (normal left inverted right x axis y axis)
HDMI-0 connected 1920x1080+2880+0 (normal left inverted right x axis y axis) 600mm x 340mm
1920x1080 60.00*+ 59.94 50.00 29.97 25.00 23.97 60.00 50.04
1680x1050 59.95
1440x900 59.89
1280x1024 75.02 60.02
1280x960 60.00
1280x800 59.81
1280x720 60.00 59.94 50.00
1152x864 75.00
1024x768 75.03 70.07 60.00
800x600 75.00 72.19 60.32 56.25
720x576 50.00
720x480 59.94
640x480 75.00 59.94 59.93
480x576 50.00
480x480 59.94
DP-2 connected primary 2880x1800+0+0 (normal left inverted right x axis y axis) 331mm x 207mm
2880x1800 59.99*+
DP-3 disconnected (normal left inverted right x axis y axis)
DP-4 disconnected (normal left inverted right x axis y axis)
So the external monitor is being detected by HDMI-0, but my external monitor is reporting no signal (and yes input is set to HDMI on the monitor). Also strange that xrandr is reporting it as 1080p but it's actually 1440p.
The wiki on multihead tells me to use the xrandr command along these lines:
xrandr --output HDMI-0 --auto --right-of DP-2
And this does move the external screen around, as in my mouse can move off my laptop screen where I've positioned the external screen, but there's no signal.
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I have some new information. I tested it on a Viewsonic 1080p monitor I had with a VGA-to-Thunderbolt adapter. This worked perfectly straight away. So I tried the same connection for the Asus monitor and it too worked perfectly.
So I know I'm lacking something with HDMI. I'd still like to solve this because the VGA connection is capping my resolution at 1080p.
$ lspci | grep VGA
01:00.0 VGA compatible controller: NVIDIA Corporation GK107M [GeForce GT 650M Mac Edition] (rev a1)
$ lspci | grep HDMI
01:00.1 Audio: NVIDIA Corporation GK107 HDMI Audio Controller (rev a1)
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HP2509 Stays on for 1 second then goes to sleep

I can repeat this over and over again by turning off and then back on. Or changing video settings from the computer. Anything that I'd normally do to wake it up still works but then it goes back to sleep in one second.
I think this happened a year ago and it had to do with the auto power off settings in the OSD set to like 1 or 2 seconds. I cant remember how i fixed it for the life of me. But the screen wont even stay on long enough to get to the OSD.
It doesn't matter if the computer is attached or any other video source... or none at all. The symptom is the same regardless.
Is there a factory reset that doesn't require the OSD? I unplugged and held power button for 90 seconds.... nada. PLEASE HELP!!
Thank you.

Okay - solved my own problem. Here's how in case anyone else runs into this...
The monitor was set to go to sleep in 3 seconds. Don't know how but it's the second time it fell into that setting.
That means that you have 3 second window to get to the factory reset through the OSD. It takes a few tries but you just have to learn the sequence "MENU UP UP UP OK UP OK" and do it in 3 seconds. Worked like a charm.
Hopefully this will help someone... but since I couldn't find anyone else with the same issue, probably not.

Every time my IMAC is unused for a period, then goes to sleep mode, it loses it's wireless connection and when I wake it up, it DOES NOT automatically reconnect. I have to go to systme preferences network and request that it reconnect.

My iMac is set up wireless. Everytime it's allowed to go in sleep mode, it loses wireless connectivity. Then, when I wake it up, I must go to System preferences, Network, and request it to reconnect to my home wireless network. It always does this successfully, but it's quite annoying that it seems unable to achieve this on it's own. My iPad 2 and kindle can do this, why not my iMac?

This appears to be a known issue, there are a couple of things both of you should do, first file a bug report in www.apple.com/feedback.
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HP w1907 monitor flashes briefly and then goes black. Catch a brief message of "No DV1 input"

Is this a monitor issue, cabling or computer problem? Thanks

Hello adaokie,
We won't know what kind of issue it is until we start ruling things out. Start with the cabling as it is generally the easiest to determine.
From there you can hook it up to another computer. If it does the same thing then we know it's a monitor issue.
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HP p6040d monitor going to sleep when starting

Hi our desktop does not start anymore. Everytime I turn it on, monitor says "no signal", and goes to sleep.
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By the way, the last 2-3 times I turn it on the cpu beeps(long beeps, for about 2 seconds each) multiple times.
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This pc is not that old, it's just 4-5 years old.

Any suggestions?

HP Monitor going to sleep on start up

Ok, I've dealt with this problem long enough. I have an HP pavilion Elite, hpe 400f. Monitor worked great on it, then one night while I was checking my email, the picture went scrabled, and ever since I am faced with a "Monitor Going to sleep" error on start up. I can not get into my settings or do anything.
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So what now? Nothing HP told me works. I am about to go crazy with this. I've begged HP to help me for a year off and on to no prevail.
Can you PLEASE help me?
This question was solved.
View Solution.

Hello @ddanh123,
Welcome to the HP Forums, I hope you enjoy your experience! To help you get the most out of the HP Forums I would like to direct your attention to the HP Forums Guide First Time Here? Learn How to Post and More.
I have read your post on how your monitor is faced with a "going to sleep" error message on startup, and I would be happy to assist you in this matter!
To restore the display on your desktop computer, I recommend following this document on Flat Panel Monitor Displays Message about No Signal, Signal out of Range, Sleep, or Power Save. This should help examine any possible steps that may have been missed.
If the issue persists, please call our technical support at 800-474-6836. If you live outside the US/Canada Region, please click the link below to get the support number for your region.
http://www8.hp.com/us/en/contact-hp/ww-phone-assist.html
I hope this helps!
Regards
MechPilot
I work on behalf of HP
Please click “Accept as Solution ” if you feel my post solved your issue, it will help others find the solution.
Click the “Kudos, Thumbs Up" on the right to say “Thanks” for helping!

HP 2309v Monitor goes into sleep mode

My monitor an computer have been working fine for three months (since i bought a new computer Packard Bell) all of a sudden my monitor stopped working correctly. It now says VGA : no signal and gives recommended settings - then goes into sleep mode. All cables are plugged in correctly, i have restarted the computer countless times (even taken it apart and removed the RAM as suggested on another post). To no avail. Please help.

Hello SEAN1982,
Welcome to the HP Forums, I hope you enjoy your experience! To help you get the most out of the HP Forums I would like to direct your attention to the HP Forums Guide First Time Here? Learn How to Post and More.
I understand that you are having issues with your computer display not working. Given your statement that you have tried plugging it into two TV's I am assuming it does not work on them either. This would indicate the problem resides on the computer itself. I am recommending that you review and follow the HP Support document: Windows 8 Safe Mode, which should enable you to boot. If you are able to boot into Safe Mode and see the computer again follow the steps set out in the HP Support document: Using Microsoft System Restore (Windows 8), which will walk you through restoring your computer back to before this became an issue.
***NOTE: Do not worry about the documents being Windows 8 and not Windows 8.1 the steps are the same.
If you cannot boot into Safe Mode the issue appears to be a physical issue and I think it would be best if you contact HP Technical Support for repair options.
I would like to thank you for posting on the HP Forums. Have a great day!
Please click the "Thumbs Up" on the bottom right of this post to say thank you if you appreciate the support I provide!
Also be sure to mark my post as “Accept as Solution" if you feel my post solved your issue, it will help others who face the same challenge find the same solution.
Dunidar
I work on behalf of HP
Find out a bit more about me by checking out my profile!
"Customers don’t expect you to be perfect. They do expect you to fix things when they go wrong." ~ Donald Porter

HPw1907 giving Monitor is going to Sleep

I just got a new desk! unhooked everything and hooked everything back up monitor is saying it is going to sleep and I have no Idea how to get this problem solved PLEASE HELP !! working on windows xp ! I am on my daughters computer now so please come to the none computer persons help!
This question was solved.
View Solution.

1) Turn off the computer tower
2) Unplug the black power cable from the back of the computer
3) While the cable is out of the tower, press and hold the power button in front of the pc for at least 10 seconds
4) Plug the power cord back in the pc
5) Make sure the monitor's power and video cables are connected properly
6) Turn on the pc and monitor and see if it works.

Monitor reports no signal then goes to sleep.

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