Connection problems?? Im building a new computer and i got this monitor to go with it. when i boot up it tells me no video input, check cable. Now i have tried reseating the video card, makeing sure everything is plugged in, trying both vga and dvi. and still nothing.

It could be the monitor or the graphic/video card.Try taking a cable from the computer to your dvi/hdmi input on TV or another monitor that would tell if the graphic/video card is still working.if you can't then try to connect a laptop to the input of the monitor.monitor usually give up the ghost due to failed capacitors/ dry joints.video cards will if they get overclocked.just some pointers that may help you.

is there power to the monitor? is the monitor in standby(yellow light on monitor)? is the monitor on (green light on monitor)? how is the monitor connected to the computer, VGA (square fat cable, the end may be blue) or HDMI cable? When you turn on the computer is the power light on and HDD light flashing / showing activity? this would indicate that the computer is booting up. If you have power light and activity on the computer, I would unplug the data cable to the monitor. If the monitor is plugged in, i would press the power button to try and turn on the monitor / take it out of standby. If the monitor is ok you should see a message like "no signal" or "no input". This would tell you that the monitor is fine, but you may have a problem with the video card or video port on the motherboard. If you have no activity light on the on the computer, you may have a problem with the OS not booting up. You really didn't provide much detail on what has been done, but this is how I troubleshoot out in the field when working on something like this.

old monitor 1280 x 1024
power light on?
OSD work?
if it said on the screen no input sig, then that is 100% true
the PC is not sending output.

check the video cable connections both ends
then if bad, boot PC to safe mode. does that work.
then maybe you set the PC graphic resolution too high for the monitor. use safe mode to set new , legal resolution
1280 x 1024 is max, do not exceed, the horz, vert, reso to the left here. if you do the monitor , will display, out of range. errors.

im confused, you show HP monitor then Sam.
why ?
my guess is HP question posted in SAM section.
so here is my HP answer
1280 x 768 @ 75Hz

if your PC or other device exceeds any of those. this old monitor
will go blank.
HOR, vert and refresh rates max.

to solve this riddle, set the PC to
1280 x 768
then connect monitor and bingo.
but there is a chicken and egg deal here.
if the display car is over this, as most new systems are.
then use safe mode to set the resolution to 1280 x 768
and reboot to normal mode.
boot and it F8 , safemode.

So either the computer isn't generating a video signal, the cable isn't carrying the signal to the monitor, or else the monitor isn't capable of receiving a video signal.To test this, first try a video cable that you know is good, in case your cable is bad, If it works with the other cable, the problem was your original video cable. If it still doesn't work, put your original cable back, and hook another computer up to the monitor. If the monitor makes the same message, the problem is with the monitor. If the other computer works when connected to this monitor, your problem was that the original computer isn't booting (which could be due to several reasons I will list below), or the video adapter is broken.Possible reasons for the computer not booting: bad power supply, bad power button, bad hard drive, bad memory, bad motherboard component. If you determine that it isn't booting, unplug everything except the keyboard mouse monitor and power cord, to see if that makes a difference. If it boots after that, something you unplugged was causing the problem, plug them each back in one by one, rebooting in between, and when it stops booting properly, the last thing you plugged in is causing the problem.

It sounds like the computer is sending a signal to the monitor, but the monitor is not happy with the signal.

First, I'd check the cables. Make sure they're all plugged in solidly to the right ports. If you have a spare cable, swap it out to see if it helps. Note that Component Video is not the same as RGB, so you can't just plug an RGB cable into Component jacks.

Did the monitor come with software that needs to be installed? Make sure that's installed.

Check the monitor manual for what kinds of input it can accept. Check your computer's manual for what kind of video output it can produce. Make sure you're using a protocol that both can work with.

Try connecting the monitor to another computer. Maybe the monitor is faulty.

Try using a different video protocol. If you were using your computer's HDMI port, does it have an RGB port? Can you use USB?

this usually means the monitor is not getting a signal

• i would check the hdmi/dvi/vga cable connections
  both on the back of the pc and on the back of the monitor.

• if the connections are tight, and plugged in well, maybe try and connect it to a second computer or laptop.
• If it works the problem probably lies with your gfx card in your computer (verify this by trying another monitor on it)
• If it doesn't work on those i would try and replace the aforementioned cable (usually pretty cheap)
• if the problem still persists the monitor would probably need to be replaced as its defective.

Possible causes:

1. Bad cable. Use another video cable that you know is good and test with it.

2. Input source on monitor incorrect. Check to make sure you've got it set to the correct input (VGA or HDMI)

3. Unplug/replug the video cable connections at both the monitor and computer...it could be just corrosion or dust.

4. Hook up the monitor to another computer that you know is working. If your monitor then works, then you know that the video output on your computer has failed. You can also test this situation by connecting a known good monitor w/known good cable to your computer to see if you get video.

Hope that's helpful.

When you power up the cpu check your smps is working?
Then check num lock key on key bord if it is on and off when you press numlock then your cpu gives dispaly to monitor ok.
but if it not constant on or off no change when you press num lock key then you have to open cpu cabinet.
Refix RAM memory .
Clean dust from motherbord chipset.
Pull out cmos cell for 15 minutes so bios settings are reset to defaults.
then check.
refix all connection to mothebord like ATX power supply from smps.

control panel
click power settings
set the monitor to never sleep or dim
same on all windows.
the monitor is totally programmable
why not tell OS?
windows 10?

or google
why does my windows 10 monitor go to sleep
10,000,000 hits
endless.
the defaults under windows, are always wrong,
it's to keep the FEDs happy with there Energy Star bs.
im on laptop now far far from USA
set it all to not use sleep etccetra.

1.there might be a problem with your signal cable. if one of the pin in the signal cable is open. it might also happens
2.adjust signal cable.
3.Check VGA video card is working properly. unplug the VGA card and Re-plug to its slot. if your mother borad has inbuilt video card. this process cannot be performed
4.Even problem with operating system might also happen.. problem with Video Ram memory
5.if you want to check whether your monitor is ok. just get Cpu Box alone frm friends for a while for a testing.
6. if your monitor have problem then contact service centre.