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My screen is connect to the computer whith the blue cabel and to the screen as needed. i can't see any picture and on the screen write "no signal input" what should i do?

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In the future, please list a brand and model. I must assume this is a desktop computer. If it is a laptop, I am typing this all needlessly because you need to hit the external monitor button on the laptop keyboard to switch screen or use both. I can also assume that there are no beeps and the rest of the pc appears to boot up normally, the cd lights up, the hard drive access light flickers, etc. Most desktop pc's have become cheaper in that the video is integrated into the motherboard. Before you run out and attempt to change the motherboard, if the unit is under warranty, let the manufacturer honor the warranty. If it is not, proceed in a cost effective manner. Check the monitor with another computer or a tv with an SVGA output plug. This is the cheapest an most non-invasive solution besides checking the plug to make sure it is physically plugged in. If the monitor is tests good, ground yourself by touching the metal case before you open the case while it is plugged into the wall outlet. Unplug the rest of the wires and re-seat the RAM memory chips. Since desktop computers use shared memory, it is possible for one chip to go bad or chip creep to make a bad connection. Try one last time to boot up. You do not need anything bu the power and video cable plugged in to test the video and you do not need to replace the cover yet. If it still does not boot you have a choice. Either replace the motherboard or just add a video card with it's own memory. Which video card depends on two things. Which motherboard is in the unit determines whether you need a PCI, PCI-E, AGP, AGPx2, or in simple language, how the new card will plug into the slot. You cannot put a round peg in a square hole so buying the right card will give you cheap instant gratification. Written in the motherboard in small print is the name and model number of the motherboard. All units also must have an FCC id which identifies the manufacturer. Dell, nor HP makes the actual computer parts like the motherboards. They do keep a database of drivers and a few spare parts for units under warranty. I would check the manufacturer's web site for the motherboard specifications; however, if you check the two hyperlinks above, you can look at the pictures and buy the correct video card. I personally would not change the motherboard on an older unit because too much can go wrong and the unit will work faster and better with an add in video card with it's own memory. You can go into any Best Buy or shop online with Tiger Direct and get a video card with the proper interface. Once it arrives, ground yourself once again, and consider ordering an antistatic wrist strap too. Remove one screw or use a screw driver to twist and remove the cover where the video card goes, using two hands insert firmly. Replace one screw. plug it in and enjoy.

Posted on Apr 02, 2011

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