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Monitor not working, but showing power on when not connected to pc

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Your video card has a problem if you are using an after maket video card (if you got an upgrade) try unpluging it and connecting your monitor to your mainboard video card (vga slot) its the medium size blue port

Posted on Sep 08, 2008

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Posted on Jan 02, 2017

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How do I retrieve photos on my hp pavilion 325c? When I try to turn the desktop on a light blink under the power button


The light blinking under the power button is Hard Drive activity which is normal. Do you have the monitor plugged in and switched on?

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How to turn my 1080 hp monitor on connected to my computer


Look for the power button/switch on the monitor

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Why is my hp 23xi power led blinking with black screen?


I set the Default Source to HDMI and saved it an all has been good. Click the Main Menu button
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Oct 09, 2015 | HP Pavilion 23xi - LED monitor - 23"

1 Answer

My new moniter of aoc is not working and showing message that No Signal i cheacked power cod and cheacked other power cods but still showing same mssage


Hi,
Usaully when monitors show message that means the monitor is working fine what you have to check if the cable going to the computer is good and connected properly and if so you have to troubleshoot your pc.
Regards

Mar 07, 2015 | AOC Computers & Internet

1 Answer

PC SWITCHS ON BUT NO PICTURE


1. Check to make sure your monitor is on! Some monitors have more than one power button or switch - check to make sure they're all switched on.Check for disconnected monitor power cable connections. Your monitor might be working fine and your only problem may be a loose or unplugged monitor power cable.Note: A disconnected monitor power cable could be the cause of your problem if your monitor's power light is completely off.Check for disconnected monitor data cable connections. Again, your monitor might be turning on without a problem but no information can get to it because the cable that connects your monitor to your computer is disconnected or loose.Note: A disconnected monitor data cable could be the cause of your problem if your monitor's power light is on but is amber or yellow instead of green.Turn the monitor's brightness and contrast settings completely up. Your monitor might be showing information but you just can't see it because these display settings are too dark.Note: Most monitors today have a single onscreen interface for all settings, including brightness and contrast. If it turns out that your monitor isn't working at all then you'll likely not have access to this interface. An older monitor might have manual knobs for adjusting these settings.Test that your computer is working correctly by connecting a different monitor that you are certain is working properly to your PC. Your monitor may be working fine but your computer might not be sending information to it.If the new monitor you connected does not show anything either, proceed to Step 6.If the new monitor you connected does show information from your computer, proceed to Step 7.Important: When testing with the new monitor, make sure you use the data cable that came with it and not the one from your original monitor.Determine why your computer isn't sending information to your monitor. Since neither monitor works, you now know that the computer is not sending information to the monitor. In other words, you've proven that your computer is the reason that nothing shows up on your monitor.Chances are your original monitor is working fine.Test your original monitor with a monitor data cable that you know is working. It's possible that the monitor itself is working properly but it can't receive information from the computer because the cable that connects the monitor to the PC is no longer working.Note: If possible, test using the data cable from the monitor that you successfully tested with in Step 5. If not, purchase a replacement monitor data cable to test with.Note: The data cable on some older monitors are permanently connected to the monitor and are not replaceable. In these cases, you'll have to skip this step and proceed to Step 8 Replace the monitor.

Sep 27, 2011 | Mesh Matrix 6000+ DX PC Desktop

1 Answer

When I open HP MY DISPLAY software it doesn't work. It looks full black. There is no menu or option. It shows blank. So I can't tune display color or any other things. I uninstalled it. Then I...


HP W1707 LCD Monitor circa 2008 old. 10 years old NOW.
No PC stated or any OS at all. windows what?

connected to what? it must be connected to a working PC
or the monitor is useless as 3rd shoe.

i can only be 2 things, PC or screen bad.
  1. the test is child easy test the monitor on another PC.
  2. or test the dead PC on another good monitor.
the monitor has no software ever.
only the PC side does for the PCs video chip GPU driver.
but the PC always has one, even if, poor quality resolution.

Toss magic coin land on bad w1707
The screen, can fail for many reasons lets say it fails on a good PC. known good.
these old monitors have CCFL lamps that love to fail inside.
It has no LED back lamps , before 2010. it haS CCFL lamps.
The monitor all by its self, pc disconnected.
you power it on and it shows logo, HP or Compaq
then for seconds turned on the menu may work.'
if you see nothing the CCLF are dead.
The menu button works only with good running PC. but
might work for 1 second.
some do others dont but only for seconds does the OSD work
lacking a good PC connected.

the OSD is the menu from the monitor brain inside
the button is called select or menu.
PC turned off and Monitor now turned on the screen shows.
if the PC is dead the Monitors brain then shows.
NO SIGNAL , or NO sync.
or if PC is set up wrong the monitors shows, OUT OF RANGE.

CCFL love to fail.
the lamps turn yellow, blink or go DEAD.
as can the HV inverter seen here.

http://www.pcdied.com/monitors.html#Inverters-monitors

PAR:
i one uses the monitor 10 hours a day
on the 5th year, the CCFL goes dead. that is there normal life span.

Dec 27, 2017 | HP W1707 LCD Monitor

1 Answer

Samsung syncmaster225UW monitor suddenly not working on pc. Plugged into laptop works fine on analogue, on sons pc shows digital and wont let me change to analogue, any ideas, im not technically minded,...


Have you tried connecting the monitor then powering the PC on. at that point i would say it could be a problem with the PC.

When you connect the monitor and power on the PC, do you see anything on the monitor screen at all?

Has anything been modified on the PC right before it stopped?

Sep 29, 2017 | Samsung 215TW SyncMaster 21" LCD Monitor

1 Answer

My pc does not give display ? Why


Time Required: Testing a monitor could take from a few minutes to much longer depending on the cause of the problem Here's How:
  1. Check to make sure your monitor is on! Some monitors have more than one power button or switch - check to make sure they're all switched on.
  2. Check for disconnected monitor power cable connections. Your monitor might be working fine and your only problem may be a loose or unplugged monitor power cable. Note: A disconnected monitor power cable could be the cause of your problem if your monitor's power light is completely off.
  3. Check for disconnected monitor data cable connections. Again, your monitor might be turning on without a problem but no information can get to it because the cable that connects your monitor to your computer is disconnected or loose.
    Note: A disconnected monitor data cable could be the cause of your problem if your monitor's power light is on but is amber or yellow instead of green.
  4. Turn the monitor's brightness and contrast settings completely up. Your monitor might be showing information but you just can't see it because these display settings are too dark.
    Note: Most monitors today have a single onscreen interface for all settings, including brightness and contrast. If it turns out that your monitor isn't working at all then you'll likely not have access to this interface. An older monitor might have manual knobs for adjusting these settings.
  5. Test that your computer is working correctly by connecting a different monitor that you are certain is working properly to your PC. Your monitor may be working fine but your computer might not be sending information to it.
    • If the new monitor you connected does not show anything either, proceed to Step 6.
    • If the new monitor you connected does show information from your computer, proceed to Step 7.
    Important: When testing with the new monitor, make sure you use the data cable that came with it and not the one from your original monitor.
  6. Determine why your computer isn't sending information to your monitor. Since neither monitor works, you now know that the computer is not sending information to the monitor. In other words, you've proven that your computer is the reason that nothing shows up on your monitor.
    Chances are your original monitor is working fine.
  7. Test your original monitor with a monitor data cable that you know is working. It's possible that the monitor itself is working properly but it can't receive information from the computer because the cable that connects the monitor to the PC is no longer working.
    Note: If possible, test using the data cable from the monitor that you successfully tested with in Step 5. If not, purchase a replacement monitor data cable to test with.
    Note: The data cable on some older monitors are permanently connected to the monitor and are not replaceable. In these cases, you'll have to skip this step and proceed to Step 8.
  8. Replace the monitor.
    WARNING: A computer monitor is not a user serviceable device. In other words - do not open the monitor and attempt to repair it yourself. If you would rather have your dead monitor serviced instead of replaced then please let a professional do it.

Aug 02, 2010 | Dell Dimension 2400 PC Desktop

2 Answers

Compaq presario s5100nx won't power on


no monitor stated, ! wow. (hard to help this)
generic PC 101:
1: test this monitor on any other PC.(vga)
2: test this PC on any other VGA monitor .
either test above quickly proves which end is bad.
easy no?, just one simple test and 1/2 the causes go byebye...

if the PC goes dead the monitor goes to sleep mode. and HP monitor shows yellow power. lamp.

I will do simple monitor tests now
even with NO PC connected. (basics)

1: most monitors will even a sign on message, with no PC.
a HP logo graphic, Compaq logo shows. or some text.
newer monitors show logo message "energystar" every time.
then shows..... (the last means PC is setup wrong)
NO SIGNAL
NO SYNC
OUT OF RANGE.
errors. then goes black.

if it shows nothing ever, the monitors 15 year old
CCLF tubes inside are now dead, 99% are now.
the LCD back light lamps died long ago , on most.
if the back lamps are good from year 2003,.wow
then.... (like finding 1995 car that runs)

the monitors OSD screen on most will work now.
on demand !by YOU.
for a few seconds, lacking a PC connection.
power on and hammer the menu key see OSD.? even for 1second.
This works best with working PC, the OSD will not work at all with a dead PC but some screens can be tricked into showing the OSD for few seconds at power on, no PC conn., (it's super good to know these facts,when screen is dead or partly)

you asked about the magic batteries. (cake walk)
well sure, all 15 year old PC have bad RTC coin cell battery on the DESK top , inside mother board.
if never serviced for 15 years it is bad.
replace it, (below 2.9vdc is bad battery(metered)
remove it look at number and get one at walfart.
2032 cells are common

example

https://www.walmart.com/search/?cat_id=0&facet=pickup_and_delivery%3AFREE+Pickup&query=cr2032+battery&typeahead=cr2032#searchProductResult
(camera dept, or watches)


my nice test monitor (tech)
HP lE2000x (led) nice and small.
power on (no PC connected)
blue lamp power button glows every time it gets power.
Large menu pops UP, shows scanning VGA/DVI and more for 2 to 3 seconds
then a large white menu pops
and shows "monitor going to sleep" in clear English. (means PC is dead , this case missing)

the blue led power lamp goes from blue to yellow
and screen is now black. (all 100% normal)
these are what all LCD do powered on.

if the monitor is totally 100% dead all ways from Sunday, then it is. as all are now with CCLF tubes
99.9% are dead, if used.
the lamps last 20,000 hrs and DIE.913c8268-90a1-42b6-be05-ed78514f589e.jpg

Jan 08, 2018 | HP Compaq Presario S5100NX (DM172A#ABA) PC...

3 Answers

What does the red light mean next to the power button?


The red light next to the power button is usuall the hard drive led which should blink every time the hard drive is in use, there is normally a green or yellow light for the power that shoukld stay on constant when the computer is on.

Feb 09, 2010 | Intel Compaq EVO D500 (RBMDTCPQP42400) PC...

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