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Re: the pc does'nt send any signal
Ok, firstly do you see the bios screen at start up before windows starts?
If you do, try repeatedly pushing F8 during the bios screen to go to the advanced boot menu and try booting to safe mode. If you can boot to this then its a driver problem.
If not is the pc booting up? Can you hear the fans and hard drive going, is the hard drive light flashing etc?
If your sure the pc is starting correctly, you need to establish if your using built in graphics or an extended graphics card. Easy way to tell is if your monitor connector on the back of the pc is fairly low in one of the horizontal slots then it's an extended graphics card.
If it is, then unplug the pc and open the side or back, lay it on its side and check that it is seated in the slot correctly, even better remove it and reseat it, push firmly but not too hard, they can be a bit fiddly. Sometimes the cards or CPU's can creep out of the slot due to repeated heating up and cooling down, or can be jogged during transit etc.
If its onboard graphics, ie your monitor connector is higher up in amongst the other connectors etc then you will have to buy an extended graphics card PCI, PCIe or VGA as its difficult to fix onboard faults without replacing the whole motherboard.
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"no input" means that there is no signal from computer or the monitor cable is unplugged. When you first turn on monitor it usually does a self test and then looks for signal. Not connected to PC will give a no signal. If it is connected but PC is off (not unplugged) then it should go into standby as you vid card will be sending a standby signal to any monitor connected. Sometimes the Plug and Play monitors need to register before it will recognize a standby signal from PC, so plug it up and boot up PC. Then shutdown normally, your monitor should go into standby when the PC shuts down.
several reasons. first make sure all cables are corectly plugged in. make sure that monitor is working by testing it on another pc. if it turns on. most likely bad cables or the pc it self its not sending a signal to the monitor. ( which is bad the cause for it could be anything) try plugging it into another working pc and let us know.
If you dont get a signal to the monitor check these two situations: 1.check if the graphic card is properly inserted(pul it out and then back again) 2.check if the monitor in plug in if yes try to test the monitor maybe it's broken
Please do a monitor self test connect a monitor without a cpu or rather just connect a power cable to a monitor if u get check video cable or something lyk tht its wrkng if nt thn u l need 2 change the monitor
please test the power source that the computer is plugged into and confirm it is working with a lamp or something.
If power source is confirmed working and the computer is plugged in and it is turned on and there is still no signal to the monitor and the ethernet lights are not on when the cable is plugged into it. Also check that all cables from the monitor to the computer are connected properly and secure. if the above has been done and still no signal then there are some Possible Causes
1. Mother Board failure (video card on motherboard is defective)
2. Monitor Failure (computer is sending video signal but monitor can not process it)
3. Video Card failure (if the video card is not designed into the motherboard)
Troubleshooting and repair
See if you can get access to another monitor to test the computer with to see if it sends he video signal ok to that monitor. If you can not get access to one then the only option is to get a video card and either you can install it yourself, or have it installed at a repair station.
If you purchase the card and install it yourself most stores will let you return the cards if they do not work or they are not usable. If you do go that route just make sure to ask about return policies prior to trying it.
I would really consider replacing the video card first you can get them from 30.00 and up and there is ony a few screw to remove to install them. Most of the video card manufactures also have tech support for helping people with the installations of the cards.
I would not worry about the lights on the modem or network card until the monitor issue is resolved so you can then see if it is indeed making a connection to the internet.
If there's no signal on monitor. Try to check the cables connected to your monitor. To isolate the issue, test that cable to a different monitor, or test that monitor to a different computer using a different monitor. By doing those things I mentioned above, you would be able to determine the root cause of the problem "no signal on monitor".
This means the monitor believes it's not connected to the computer. Verify the cables first of all. Then try booting in safe mode (F8 key at PC startup) in order to verify that the PC is sending data to the proper video port (you might have a dual VGA / Digital output, for example, and the monitor might be connected to the wrong PC port). Quite often, a "bad signal" will be the same of "no signal"; and you can have a bad signal if the monitor resolution on the PC is set too high. This could happen if you installed a high-resolution capable monitor, and then replaced it with a not-completely-plug-and-play, lower resolution one. The PC would keep sending hi-res signals to a monitor which can neither interpret them, nor tell the PC "please slow down". To check this last possibility, reboot your computer while the monitor is ON. When PCs reboot, they usually drop back to standard VGA signaling, which all monitors understand. If the monitor abruptly comes to life and displays a boot screen, then goes No Signal again after several seconds, you've got a resolution issue; get in Safe Mode with F8 key at boot, and modify the screen properties (right-mouse button on the desktop, then Properties).
If everything else fails, try also connecting the monitor to another PC or laptop, to see if it works there.