WARNING: Before you start troubleshooting remember that you
are dealing with electricity that can KILL.
http://www.kitchentablecomputers.com/static.php
- rules
Test all power and data leads that attach to your hard drive
IDE,SATA
the leads from your (motherboard to your hard drive) make
sure they have secure dust free connections and are not faulty
if its a 40 pin flat ribbon type it will be the first to
fail
make sure all leads that are attached to your drives dvd\cd
and floppy have secure connections and are not faulty
even something as small as a faulty electrical fan and its
lead can cause you problems
computers need all power and data to continue through every
working device and to have an end so any faulty leads will end up with a
computer error
Check your RAM.
The RAM is located in the middle of the
motherboard.
There are tabs that you can push to release the
RAM.
Remove it and put it back in place until the tabs
pop out.
Loose RAM can cause your computer not to start
properly where you want to see a video signal.
Make sure your graphics card is securely seated with no dust
built up or in the socket
if you remove your graphics check the socket to make sure its
dust free
Restart your computer then reinstall it this should activate
found new hardware wizard
Check the vga lead for secure dust free connection or try
another vga lead.
also
If you have used a desktop computer or have a dual-monitor
setup, you have likely seen the "No-input Signal" error message on
your computer monitor.
The error message may point to a number of culprits.
Accordingly, the solutions run from simple to complex.
Prior to attempting advanced troubleshooting methods, check
the connection first.
Power off the computer and the monitor.
Remove the cable that connects the monitor with the
computer, then reseat it.
Try a different port, if possible, then reboot the computer.
Connect the monitor to another computer if possible to eliminate the monitor as
the faulty hardware.
Shut down the computer.
Remove all cables and devices plugged into the computer.
Make a note of the port into which your monitor is plugged.
Remove the left side
panel when facing the front of the case.
Unscrew screws or manipulate latches to remove the side
panel.
This process varies according to the type of case you have.
Please consult your manual if you are unsure of how to
remove the side panel.
Attach the antistatic wrist bracelet's clip to a metal object, then ********
the bracelet.
Locate your video card.
(This will be the card that contains the port with which
your monitor interfaces.)
Remove the slot cover screw that secures the card into the
slot.
Remove any power cables that connect the video card to the
power supply.
Pull the card out of the slot.
Examine the gold pins to check for any damage.
Reseat the card if it physically appears to be undamaged.
You should hear a click once the card is secure in the slot.
Screw in the slot cover screw.
Attach the power cable from the power supply unit, if
applicable.
Leave the case open for now.
Reconnect only the monitor, power cable and any devices
required to boot the computer, then restart the computer.
Shut down the computer again if you receive the
"No-input Signal" error message again.
Remove any cables and devices you plugged in to restart the
machine.
Remove the video card with a spare or replacement by
following the instructions above.
Connect necessary cables and devices to reboot the
computer, then restart it.
Shut down the computer and remove cables and devices if
the display still won't work.
Unplug the power supply's cables from all devices on the
motherboard.
Make a note of each plug-in so that you can correctly
connect all devices with the new power supply.
Remove the screws that mount the power supply.
Fit the new power supply into the mounting area, and screw
in all screws.
Attach all required power cables to devices connected to
the motherboard.
Attach the cables and devices required to start the
computer.
Reboot.
http://en.allexperts.com/q/PC-hardware-CPU-1023/input-signal.htm
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